MAINTENANCE
2.18
Arrow Indicates Direction
of Flow
To Carburetor
5. Install clamps on fuel line.
6. Turn fuel valve ON.
7. Start engine and inspect for leaks.
CARBURETOR DRAINING
The carburetor float bowl should be drained
periodically to remove moisture or sediment from the
bowl, or before extended periods of storage.
Drain tube
attached
here
Drain Screw
NOTE: Thebowldrainscrewislocatedonthebottom
left side of the float bowl.
1. Turn fuel valve to the off position.
2. Place a clean container beneath the bowl drain
spigot or bowl drain hose.
ON
OFF
RES
Fuel V alve
3. Turn drain screw out two turns and allow fuel in
the float bowl and fuel line to drain completely.
4. Inspect the drained fuel for water or sediment.
5. Tighten drain screw.
6. Turnfuelvalveto“ON”.
7. Start machine and check for leaks.
NOTE: If there is a tube attached, it must be
reattached as this will effect engine performance.
COMPRESSION TEST
NOTE: ThisPolaris 4-Stroke engineis equippedwith
an automatic decompressor. Compression readings
will vary in proportion to cranking speed during the
test. Average compression (measured) is about
70--90 psi
during a compression test.
Smooth idle generally indicates good compression.
Low engine compression is rarely a factor in running
condition problems above idle speed. Abnormally
high compression can be caused by a decompressor
malfunction, or wornor damaged exhaust camlobes.
Inspect camshaft and automatic decompression
mechanism if compression is abnormally high.
A cylinder leakage test is the best indicationof engine
condition on models with automatic decompression.
Follow tester manufacturer’s instructions to perform
a cylinder leakage test. (Never use high pressure
leakagetestersas crankshaft seals maydislodgeand
leak).
Cylinder Compression
Standard70--90 PSI
Cylinder Leakage
Service Limit: 10 %
(Inspect for cause if leakage exceeds 10%)
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