be performed with extreme caution. Improper or careless actions on the
part of the person performing maintenance on your boat or engine could
result in severe personal injury, property damage and or death. Before
performing any operating or maintenance procedure covered in this
manual, be certain to read the entire manual in be certain you fully
understand the procedure. Proceed only when you determine that you
may do so in complete safety. Contact your Correct Craft/PCM dealer
for any maintenance service which you are unable to perform in
complete safety.
Note: The GM 8.1 Liter engine’s timing is fixed and can not be changed and
the firing order is 18726543. Cylinder numbering is the same as in the above
illustration.
PCM Python Engine Note:
Caution: The PCM Python is a high-
performance engine and may use more oil per engine hour of operation than
other engines. Be sure to check the oil on a very regular basis, at least every
two or three hours of operation. Failure to remedy an engine with insufficient
oil could cause severe engine damage.
8.18
FIRING ORDER
1 - 3 - 7 - 2 - 6 - 5 - 4 - 8
FORD BASED ENGINES
LEFT HAND ROTATION
FRONT
FIRING ORDER
1 - 8 - 4 - 3 - 6 - 5 - 7 - 2
GM BASED ENGINES
LEFT HAND ROTATION
FRONT
Cylinder Number Locations
Ski 10.qxd 9/1/00 2:43 PM Page 8.18
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