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| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_genc_IncometaxestableTable_519113" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_519117" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_519118"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_519117" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_519118" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_IncometaxesLineItems" xlink:label="loc_genc_IncometaxesLineItems_519114"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_806550"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_genc_IncometaxesLineItems_519114" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_806550" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
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| <presentationLink xlink:type="extended" xlink:role="http://www.gencor.com/role/RevenueRecognitionAndRelatedCostsDisaggregationOfCompanysNetRevenueByMajorSourceDetail"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_238"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis" xlink:label="loc_srt_ProductOrServiceAxis_241"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_240" xlink:to="loc_srt_ProductOrServiceAxis_241" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_242"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ProductOrServiceAxis_241" xlink:to="loc_srt_ProductsAndServicesDomain_242" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_EquipmentSalesMember" xlink:label="loc_genc_EquipmentSalesMember_246"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ProductsAndServicesDomain_242" xlink:to="loc_genc_EquipmentSalesMember_246" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_PartsAndComponentSalesMember" xlink:label="loc_genc_PartsAndComponentSalesMember_247"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ProductsAndServicesDomain_242" xlink:to="loc_genc_PartsAndComponentSalesMember_247" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_FreightRevenueMember" xlink:label="loc_genc_FreightRevenueMember_248"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ProductsAndServicesDomain_242" xlink:to="loc_genc_FreightRevenueMember_248" use="optional" order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_OtherRevenuesMember" xlink:label="loc_genc_OtherRevenuesMember_249"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ProductsAndServicesDomain_242" xlink:to="loc_genc_OtherRevenuesMember_249" use="optional" order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_243"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_240" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_243" use="optional" order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_244"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransferredOverTimeMember" xlink:label="loc_us-gaap_TransferredOverTimeMember_250"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_244" xlink:to="loc_us-gaap_TransferredOverTimeMember_250" use="optional" order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransferredAtPointInTimeMember" xlink:label="loc_us-gaap_TransferredAtPointInTimeMember_251"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_244" xlink:to="loc_us-gaap_TransferredAtPointInTimeMember_251" use="optional" order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_239"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_240" xlink:to="loc_us-gaap_DisaggregationOfRevenueLineItems_239" use="optional" order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_245"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_239" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_245" use="optional" order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_253"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_257"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_253" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_257" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_258"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_257" xlink:to="loc_srt_RangeAxis_258" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_259"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_RangeAxis_258" xlink:to="loc_srt_RangeMember_259" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_254"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_257" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_254" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_255"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_254" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_255" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_CurrentLiabilitiesMember" xlink:label="loc_genc_CurrentLiabilitiesMember_260"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_255" xlink:to="loc_genc_CurrentLiabilitiesMember_260" use="optional" order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_256"/> |
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| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_IncrementalCostsAmortizationPeriod" xlink:label="loc_genc_IncrementalCostsAmortizationPeriod_261"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_256" xlink:to="loc_genc_IncrementalCostsAmortizationPeriod_261" use="optional" order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_CostsAndEstimatedEarningsInExcessOfBillingsOnUncompletedContractsCurrent" xlink:label="loc_genc_CostsAndEstimatedEarningsInExcessOfBillingsOnUncompletedContractsCurrent_262"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_256" xlink:to="loc_genc_CostsAndEstimatedEarningsInExcessOfBillingsOnUncompletedContractsCurrent_262" use="optional" order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
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| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_256" xlink:to="loc_genc_ExpectedPeriodForContractAssetsBillingAndCollection_263" use="optional" order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_ContractWithCustomerAccountsReceivable" xlink:label="loc_genc_ContractWithCustomerAccountsReceivable_264"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_256" xlink:to="loc_genc_ContractWithCustomerAccountsReceivable_264" use="optional" order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiability" xlink:label="loc_us-gaap_ContractWithCustomerLiability_265"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_256" xlink:to="loc_us-gaap_ContractWithCustomerLiability_265" use="optional" order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
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| <presentationLink xlink:type="extended" xlink:role="http://www.gencor.com/role/LeasesSummaryOfOtherInformationConcerningTheCompanySOperatingLeaseDetail"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeDisclosureAbstract" xlink:label="loc_us-gaap_LesseeDisclosureAbstract_771319"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_781888"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_781889"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_781888" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_781889" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_781890"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_781889" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_781890" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_BlawKnoxProductLineFromVolvoCeMember" xlink:label="loc_genc_BlawKnoxProductLineFromVolvoCeMember_781891"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_781890" xlink:to="loc_genc_BlawKnoxProductLineFromVolvoCeMember_781891" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LeaseContractualTermAxis" xlink:label="loc_us-gaap_LeaseContractualTermAxis_781892"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_781888" xlink:to="loc_us-gaap_LeaseContractualTermAxis_781892" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LeaseContractualTermDomain" xlink:label="loc_us-gaap_LeaseContractualTermDomain_781893"/> |
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| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_NewLeaseAgreementMember" xlink:label="loc_genc_NewLeaseAgreementMember_781894"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_781895"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_775670"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781895" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_775670" use="optional" order="9" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_775671"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_775672"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781895" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_775672" use="optional" order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_771324"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781895" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_771324" use="optional" order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_771325"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781895" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_771325" use="optional" order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | </presentationLink> |
| <presentationLink xlink:type="extended" xlink:role="http://www.gencor.com/role/LeasesSummaryOfFutureAnnualMinimumLeasePaymentsDetail"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract" xlink:label="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_771341"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_771375"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_771341" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_771375" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_771379"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_771341" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_771379" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_771381"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_771341" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_771381" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_771346"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_771341" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_771346" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_771348"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_771341" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_771348" use="optional" order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_771349"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_771341" xlink:to="loc_us-gaap_OperatingLeaseLiability_771349" use="optional" order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | </presentationLink> |
| <presentationLink xlink:type="extended" xlink:role="http://www.gencor.com/role/LeasesAdditionalInformationDetail"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LeasesAbstract" xlink:label="loc_us-gaap_LeasesAbstract_518897"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_781875"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_518897" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_781875" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_781876"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_781875" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_781876" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_781877"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_781876" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_781877" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_BlawKnoxProductLineFromVolvoCeMember" xlink:label="loc_genc_BlawKnoxProductLineFromVolvoCeMember_781878"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_781877" xlink:to="loc_genc_BlawKnoxProductLineFromVolvoCeMember_781878" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LeaseContractualTermAxis" xlink:label="loc_us-gaap_LeaseContractualTermAxis_781879"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_781875" xlink:to="loc_us-gaap_LeaseContractualTermAxis_781879" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LeaseContractualTermDomain" xlink:label="loc_us-gaap_LeaseContractualTermDomain_781880"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeaseContractualTermAxis_781879" xlink:to="loc_us-gaap_LeaseContractualTermDomain_781880" use="optional" order="6" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_NewLeaseAgreementMember" xlink:label="loc_genc_NewLeaseAgreementMember_781881"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeaseContractualTermDomain_781880" xlink:to="loc_genc_NewLeaseAgreementMember_781881" use="optional" order="7" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_EventBasisAxis" xlink:label="loc_genc_EventBasisAxis_1264879"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_781875" xlink:to="loc_genc_EventBasisAxis_1264879" use="optional" order="8" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_EventBasisDomain" xlink:label="loc_genc_EventBasisDomain_1264880"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_genc_EventBasisAxis_1264879" xlink:to="loc_genc_EventBasisDomain_1264880" use="optional" order="9" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_RenewalEventMember" xlink:label="loc_genc_RenewalEventMember_1264881"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_genc_EventBasisDomain_1264880" xlink:to="loc_genc_RenewalEventMember_1264881" use="optional" order="10" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_SquareFootageLeasedEventMember" xlink:label="loc_genc_SquareFootageLeasedEventMember_1550407"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_genc_EventBasisDomain_1264880" xlink:to="loc_genc_SquareFootageLeasedEventMember_1550407" use="optional" order="11" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_781882"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_781875" xlink:to="loc_us-gaap_LesseeLeaseDescriptionLineItems_781882" use="optional" order="12" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_771302"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781882" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_771302" use="optional" order="13" preferredLabel="http://www.xbrl.org/2003/role/definitionGuidance"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseExpense" xlink:label="loc_us-gaap_OperatingLeaseExpense_771303"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781882" xlink:to="loc_us-gaap_OperatingLeaseExpense_771303" use="optional" order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseTermOfContract" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_781883"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781882" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_781883" use="optional" order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeasePayments" xlink:label="loc_us-gaap_OperatingLeasePayments_814975"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781882" xlink:to="loc_us-gaap_OperatingLeasePayments_814975" use="optional" order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220630.xsd#genc_DecreaseInLeasingArrangementsRightOfUseAssetAndLeaseLiability" xlink:label="loc_genc_DecreaseInLeasingArrangementsRightOfUseAssetAndLeaseLiability_1550406"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781882" xlink:to="loc_genc_DecreaseInLeasingArrangementsRightOfUseAssetAndLeaseLiability_1550406" use="optional" order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | </presentationLink> |
| <presentationLink xlink:type="extended" xlink:role="http://www.gencor.com/role/SegmentInformationAdditionalInformationDetail"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_814956"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_814957"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_814956" xlink:to="loc_us-gaap_NumberOfReportableSegments_814957" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | </presentationLink> |
| <presentationLink xlink:type="extended" xlink:role="http://www.gencor.com/role/SubsequentEventsAdditionalInformationDetail"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="loc_us-gaap_SubsequentEventsAbstract_771397"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_775652"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventsAbstract_771397" xlink:to="loc_us-gaap_SubsequentEventTable_775652" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_775653"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_775652" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_775653" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_775654"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_775653" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_775654" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_775655"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_775654" xlink:to="loc_us-gaap_SubsequentEventMember_775655" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_1568289"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_775652" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_1568289" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_1568290"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_1568291"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_1568290" xlink:to="loc_us-gaap_CommonStockMember_1568291" use="optional" order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_775656"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_775652" xlink:to="loc_us-gaap_SubsequentEventLineItems_775656" use="optional" order="8" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_1568294"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_775656" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_1568294" use="optional" order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
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