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MAINTENANCE
Oil Pump Adjustment Procedure
400 Engines
1. Before adjusting the oil pump,
check engine idle RPM and
carburetor adjustments which
are found in the o wner ’s
manual supplement.
2. Loosen throttle cable jam nut
and turn adjuster in or out until
there is 1/16″ -1/8″ (.16 - .32
cm) of throttle lever travel be-
fore thro ttle slide starts to
open. See Owner ’s Manual
Supplement.
3. Place very slight pressure on the throttle lever until all freeplay
is removed from throttle cable (to the point where the carb slide
is just starting to rise).
4. Lift boot up off adjuster sleeve. Remove the oil pump cover.
Loosen the cable adjuster locknut. Adjust oil pump cable until
marks align (D) when the throttle slide just begins to raise.
5. Tighten the locknut.
6. Recheck adjustment. If correct, slide bootall theway downover
the upper portion of the bottom nut to ensure good sealing
against water entry. Reinstall oil pump cover and gasket.
Oil Pump Adjustment 400
D
Boot
Adjuster
Sleeve
Upper Portion
of Bottom Nut
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