100
MAINTENANCE
Oil Pump Adjustment Procedure
250 Engines
1.Before adjusting the oil pump,
check engine idle RPM and car-
buretor adjustments which are
found in the owner’s manual sup-
plement.
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 before throttle
slide starts to open. See Owner’s
Manual Supplement.
3.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).
4.Loosen locknut. Turn adjuster in or
out until all freeplay is removed
from oil pump cable (the point
where the oil pump arm is just
starting to move off of its stop).
The pump stop keeps the pump
arm from rotating any farther
down than the idle position so no
visual alignment of marks is nec-
essary. Tighten the locknut
Oil Pump Bleeding Procedure
1.Fill the oil reservoir with Polaris injector oil.
2.Loosening the bleeder screw is only necessary when the oil supply line has been
disconnected from the pump or the oil reservoir and supply line have been
completely run out of oil. In these cases, loosen the pump bleed screw one full
turn. Allow oil to flow from the bleed screw for five to ten seconds. Tighten
bleed screw.
CAUTION:
Never run the engine with the bleed screw loose.
Loss of oil will cause serious engine damage.
3.Start the engine and rotate the oil pump lever to its full open position. With the
engine at idle, hold the lever up for thirty seconds to make sure all air is out of
the system.
Lever
Locknut
Cable Adjuster
Locknut
Lever Arm
