1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 53Get this manual

1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 53

T he pa be tw ee theF'uU" andAddmarks represent one quart Add oil if th Icv 1i.s at or 101'0 thAddmark When an engine is
rox imat Iy 100 ho urs operationA 4-cyli nd engi ne ca co nsume ne quart oil in to 14 hours of wide-open throttle operationHig
her engi ne peratin empe rature in automotive engine cause even highe oil COl umptionA break-in additive (E ngine il upplemcntC-9233365-1)
added to the initi al [ill of ilLe ave this oil in th en gi ne for th co mme nded 20 hour60 days, whi hever co mes firstAfter
the injlial fill of oil has becn drainedre fill with Qui cksilver Fo rmul or 4R ilaccordingto th oil specifications Modern
engin arC equipped with hardhrome-fa ce pis on rings, whi ch cxe rl lo press ur between ring and cy linder wa lland take
more time to "seathis may result in so me oil consum ptio but it be more thaIl offse by noti cea le reduced rate of engine
wr.arThiis the rca that current model nglll ei; run for ma ny hours before re-rillgin is necessary Propcr oil level is important