1978 Johnson 175, 200, 235 HP Outboard Service Repair Manual P/N JM-7810, Page 69Get this manual
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CRANKCASE AND CYLINDERS provide equal fuel vapol' distributiol1 to tll six cylil1ders, tl1e cra!1kcase is divided il1tO six equal vlus, al1d each is sealed off tl1e otl1ers tl1rough tl1e use of ssiI1