Mercury D4.2L D-Tronic Service Manual

ENGINE MECHANICAL SERVICE MANUAL NUMBER 22
Page 3A-116 90-860074--1 FEBRUARY 2002
Rear Oil Seal
IMPORTANT: The later, D2.8L D-Tronic - serial number 0L098204 and above and D4.2L
D-Tronic - serial number 0L099525 and above, engines had dimensional changes to
the crankshaft, rear main bearing, rear main bearing carrier, thrust washers, O-ring
seal, thrust plate (flywheel spacer) and flywheel seal. Ensure by serial number that
the specifications and parts are the correct ones for the engine.
The rear main oil seal rides on both the flywheel and the crankshaft thrust plate (flywheel
spacer).
Removal
1. Remove the flywheel housing rear portion.
2. On Sterndrive (MCM) Models: Remove the engine coupler.
3. On Inboard (MIE) Models: Remove the drive plate.
4. Remove the six flywheel retaining bolts and the flywheel.
5. Remove the thrust plate (flywheel spacer)
IMPORTANT: Do NOT damage main bearing carrier or thrust washers, in the following
step.
6. CAREFULLY pry out the old seal using a suitable device.
70301
a
b
c
d
74305
a
a-Flywheel Housing (Rear Portion)
b-Flywheel Housing (Cylinder Block Portion)
c-Rear Main Bearing Carrier
d-Rear Oil Seal

Mercury D4.2L D-Tronic Specifications

General

Brand	Mercury
Model	D4.2L D-Tronic
Category	Engine
Language	English