Installation manual

90-898305
2-8
O–Ring Cylinder Head
2001 MY
The cylinder head O-ring seals have a new profile/ design. The purpose of this
new design is to fill as much of the O-ring groove as possible. This pre-vents
oil from accumulating around the O-ring and breaking down the O-ring
material.
2.5 Litre
P/N 25-859772 SST
P/N 25-859772-1
3.0 Litre
P/N 25-818573 SST
P/N 25-878453
NOTE: Model Year 2000 – Cylinder head o-rings are oval shaped and are not
directional in their installation. O-rings should not be damaged or twisted.
Replace as required.
Model Year 2001 – Cylinder head o-rings are directional in their installation.
The grooved side faces the cylinder block. The pointed side faces into the
cylinder head. Failure to install the o-rings correctly may result in cylinder
head leakage. O-rings should not be damaged or twisted. Replace as
required. The 2001 style o-rings supercede and backfit to 2000 Model Year
outboards.
Also see “Service Bulletin 2002-13” for more information.
Notes
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