1979 Johnson 2HP Outboards Service Repair Manual, P/N JM-7902, Page 35Get this manual
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5-2 DESCRIPlON
COMPRESSION STROKE -UP
outboard motors requi'e two ist effect cl'a nksh aft revolution to cO ll1pl ete tl1e ex l1a ust-i nta ke-coll1pl'ession-ignition sequenc