Polaris 2005 Sportsman MV7, Service Manual

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MAINTENANCE
2.18
VENT LINES
Check fuel tank, oil tank, carburetor, battery and
transmission vent lines for signs of wear,
deterioration, damage or leakage. Replace every two
years.
Be sure vent lines are routed properly and secured
with cable ties. CAUTION: Make sure lines are not
kinked or pinched.
FUEL FILTER
The fuel filter should be replaced in accordance with
the Periodic Maintenance Chart or whenever
sediment is visible in the filter.
Arrow Indicates Direction
of Flow
To Carburetor
Filter Located Between Pump and Carb
1. Shut off fuel supply at fuel valve.
2. Remove line clamps at both ends of the filter.
3. Remove fuel lines from filter.
4. Install new filter and clamps onto fuel lines with
arrow pointed in direction of fuel flow.
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.
NOTE: The bowl drain screw is located on the bottom
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.
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. Turn fuel valve to “Rear Tank” or “Front Tank”.
7. Start machine and check for leaks.
NOTE: All tubes attached to the carburetor must be
check for pinching or blockage, as this will effect
engine performance.
Drain tube
attached
here
Drain Screw
Ill. 1
COMPRESSION TEST
NOTE: This engine does NOT have decompression
components. Compression readings will vary in
proportion to cranking speed during the test. Average
compression (measured) is about 150-170 psi during
a compression test.
A 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 carbon deposits
in the combustion chamber or worn, damaged
exhaust cam lobes. Inspect camshaft and
combustion chamber if compression is abnormally
high.