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108
MAINTENANCE
Oil Pump Adjustment Procedure
400 Engines
1. Before adjusting the oil pump, check
engine idle RPM and carburetor ad-
justments which are found in the own-
er’s manual supplement.
2. Remove electronic throttle control
(ETC) cover.
3. Loosen throttle cable jam nut and turn
adjuster in or out until there is 1/16″
(.16 cm) of throttle lever travel before
throttle slide starts to open.
4. Place very slight pressure on the
throttle lever until all freeplay is re-
moved from throttle cable (to the point
where the carb slide is just starting to
rise).
5. Lift boot up off adjuster sleeve. Re-
move 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.
6. Tighten the locknut.
7. Recheck adjustment. If correct, slide boot all the way down over the upper por-
tion of the bottom nut to ensure good sealing against water entry. Reinstall oil
pump cover gasket.
8. Reinstall the ETC cover removed in step 2, making sure cover gasket is proper-
ly seated. If not, moisture will enter the ETC and damage the switch.
Jam Nut
Adjuster
Oil Pump Adjustment 400
D
Boot
Adjuster
Sleeve
Upper Portion
of Bottom Nut
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