1974 Johnson 135 HP Outboard Motors Service Repair manual P/N JM-7412, Page 50Get this manual

1974 Johnson 135 HP Outboard Motors Service Repair manual P/N JM-7412, Page 50

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DESCRIPlON
Two-cycle engines used outboard motors require only two piston strokesoneone down, to effect crankshaft revolution and to plete the exhaust-intake-compression-ignition sequence that p