Mercury Mariner Outboards 2.2 / 2.5 / 3.0 Service Shop Manual, Page 50Get this manual
Powerhead and Engine Component Installation Reinstall powerhead and new gasket to drive shaftApply Perfect Seal to threads of powerhead mounting bolts and secure powerhead to drive shaft housingTorque bolts to 50 lbin(6 Nm)Install electrical components, flywheel and rewind starter to engine as described in Section 2Install carburetor, fuel shut-off valve and fuel tank as described in Section 3
When engine is started, IMMEDIATELY check that water pump is operatingOperation of water pump is indicated by water discharging from "tell tale
ACAUTION
While test running engine, check powerhead cylinder block, cyli nder block cover and exhaust cover for water leaksIf powerhead leak(s) is detected, repair powerhead BEFORE placing el"'gine in serviceReinstall cowl