Crankcase Front Cover Oil Seal (Without Removing Front Cover); Removal; Installation - Mercury MerCruiser Service Manual

Description
Screw

Crankcase Front Cover Oil Seal (Without Removing Front Cover)

Removal

1. Remove the belt and crankshaft pulley.
2. Remove the crankshaft harmonic damper.
3. Pry the seal out of the front of the cover with a seal removal tool. Be careful not to distort the front cover or damage the
crankshaft.
Description
Seal removal tool

Installation

1. Apply sealant to the crankshaft front cover mating surface of the seal.
Tube Ref No.
Loctite 5900 Ultra Black
128
RTV Silicone Sealant
2. Lubricate the rubber sealing surface.
Tube Ref No.
Mercury 25W-40
Synthetic Blend 4-Stroke
139
Engine Oil
3. Install the new seal with the open end of the seal facing inward. Using the crankcase front cover aligner and seal installer,
drive the seal in until it seats.
IMPORTANT: Do not use excessive force to drive in the seal.
Description
Crankcase front cover aligner and seal installer
4. Install the crankshaft harmonic damper.
IMPORTANT: Use Loctite 598 RTV Sealant on the crankshaft harmonic damper keyway to prevent oil migration past the
key.
Tube Ref No.
Loctite 598 RTV Sealant
142
5. Install the crankshaft pulley and belt.
90-8M0099748 eng DECEMBER 2015
Description
Crankshaft front cover mating surface of the seal
Description
Crankcase front cover aligner and seal installer
Description
Engine Inspection and Assembly
Where Used
Where Used
Rubber sealing surface
30311
Where Used
Keyway
© 2016 Mercury Marine
Nm lb‑in.
31.1 –
Part Number
J45000
Part No.
92-809826
Part No.
92-8M0078629
Part Number
J35468
Part No.
Obtain Locally
Page 3B-67
lb‑ft
23