Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 138Get this manual
37 Ro tate crankshaft several times (using powerhead st and) to ass ure free operati on (no bind or catching )38Th roug hly remove all oil from mating su rfaces of crankcase cover and cyli nder block with solvent39lnstal gasket strips into grooves in rankcase coverTrim en of each gasket strip lush with edge of cover 42.After torguing crankcase cover to powerheadrotate crank shaft assembly to ve rify smooth ness of operation If crankshaft bind s, remove ran kcase cover and check sealing rings for proper alignment43Clean OW ER END CAP BOLTS with LOCQUIC PRIMER (92-593271) and apply LOCTI TE GRADA" (92-32609-' )Torque bolts to 150 lb in (16.9 Nm)
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40Apply th ineven coat of Loctite 514 on mating surfaces crank case cove and cylind er block after surfaces have been cleaned wi th Locquic Primer 41 Place rankcase cover in osi tion cy linder blockIMPORTANT: Add light oil to bolt threadsBolts thru should be tightened lirst in three progressive steps until torque of 30 lbIt(40.7 Nm) Is achievedTighten remaining bolts Sthru 141n sequence in three progresNm) Is