Mercury Mercruiser GM V-8 305 CID / 350 CID Engines Service Manual., Page 761Get this manual

Mercury Mercruiser GM V-8 305 CID / 350 CID Engines Service Manual., Page 761

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CLOSED COOLED MODELS
CAUTION
Avoid seawater pickup pump impeller damageDO NOT operate engine without cooling water being supplied to seawater pickup pump1 Remove thermostat housing and gas