1968 Evinrude Big Twin, Lark 40 HP Outboards Service Repair Manual P/N 4483, Page 20Get this manual

1968 Evinrude Big Twin, Lark 40 HP Outboards Service Repair Manual P/N 4483, Page 20

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LEAF VALVES The leaf valves time the injection of the fuel mixture into the crankcase opening only when the pressure in the crankcase has dropped to predetermined point the compression strokeFuel is d

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