1988 "CC" Colt / Junior thru 8 Models Service Manual, P/N 507659, Page 199Get this manual
Installat ion of PowerheadDeluxe and 4.5 1Remove gearcase from exhaust housing 1381 2Hold the water tube to the exhaust tube with rubber band
to simplify water tube positioning 3Lubricate end of water tubeAssemble the powerhead to the exhaust housingTighten the screws to torque of 60-84 in Ibs(7 -9 N'm), starting with the center screw4Coat driveshaft splines with GMC Moly LubeDo not coat top surface of shaft as lubricant here may prevent seating of driveshaft in crankshaft
5Install the gearcase on the exhaust housing, making sure the water tube enters grommet of the water pumpApply GMC Gasket Sealing Compound to the threads of the gearcase screwsInstall he screws and tighten to torque of 60-84 in Ibs(7-9 Nm)6Install ignition system components as described in Section 37Install fuel system components as described in Section To avoid permanent powerhead damage, instruct operator to repeat the original engine break-in procedure, as described in Section 1, before putting engine back into normal service