Mariner Mercury 105/140 JET, Service Manual

Page: 423 / 797

4A-52 - POWERHEAD 90-824052R3 JUNE 2002
Powerhead Installation on
Driveshaft Housing
1. Install Lifting Eye (91-90455) into flywheel.
WARNING
BE SURE that Lifting Eye is threaded into
flywheel as far as possible BEFORE lifting
powerhead.
2. Using a hoist, lift powerhead high enough to allow
removal of powerhead from repair stand.
Remove powerhead from repair stand, being
careful not to damage drive shaft housing gasket
surface of powerhead.
3. Place a new gasket around powerhead studs and
into position on base of powerhead.
IMPORTANT: DO NOT apply lubricant to top of
driveshaft as this will prevent driveshaft from
fully engaging into crankshaft.
4. Apply a small amount of 2-4-C w/Teflon Marine
Lubricant (92-90018A12) onto driveshaft splines.
5. Use hoist to lower powerhead onto driveshaft
housing. It may be necessary to turn flywheel
(aligning crankshaft splines with driveshaft
splines) so that powerhead will be fully installed.
a
51804
a - Lifting Eye (91-90455)
6. Install 10 flat washers,and10 locknuts which
secure powerhead to exhaust extension
plate/driveshaft housing. Torque locknuts in 3
progressive steps until secured.
7. Disconnect hoist from Lifting Eye and remove
Lifting Eye from flywheel.
8. Reinstall plastic cap into center of flywheel cover.
a
a
51846
a - Powerhead Attaching Locknuts and Flat Washers – Torque
Nuts to 20 lb. ft. (27.0 N·m)
9. Standard Models – Connect water hose to fitting
on exhaust adaptor plate.
b
a
51851
a - Water Hose
b - Fitting