1995 Johnson/Evinrude Outboards 25, 35 3-Cylinder Service Repair Manual P/N 503147, Page 135Get this manual
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4 Use Gel Seal and Gasket Remover to remove all
feeler gauge set
Cylinder head warpage must not exceed 0.004 in(0,10end to end Resuface replace head if warpage exceeds this dimensio