Arctic Cat 350 2011 Service Manual page 29

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Problem: Engine noisy (Noise seems to come from crankshaft)
Condition
1. Bearing worn - burned
2. Lower rod-end bearing worn - burned
3. Connecting rod side clearance too large
Problem: Engine noisy (Noise seems to come from transmission)
Condition
1. Gears worn - rubbing
2. Splines worn
3. Primary gears worn - rubbing
4. Bearings worn
5. Bushing worn
Problem: Engine noisy (Noise seems to come from secondary bevel gear and final driven shaft)
Condition
1. Drive - driven bevel gears damaged - worn
2. Backlash excessive
3. Tooth contact improper
4. Bearing damaged
5. Gears worn - rubbing
6. Splines worn
7. Final driven shaft thrust clearance too large
Problem: Engine idles poorly
Condition
1. Valve clearance out of adjustment
2. Valve seating poor
3. Valve guides defective
4. Rocker arms - arm shaft worn
5. Magneto defective
6. CDI unit defective
7. Spark plug fouled - gap too wide
8. Ignition coil defective
9. Float out of adjustment (350)
10. Jets obstructed (350)
11. Pilot screw setting improper (350)
12. Idle Step Control (ISC) malfunction (425)
Problem: Engine runs poorly at high speed
Condition
1. High RPM "cut out" against RPM limiter
2. Valve springs weak
3. Valve timing incorrect
4. Cam - rocker arms - tappets worn
5. Spark plug gap too narrow
6. Ignition coil defective
7. Float level too low (350)
8. Air cleaner element obstructed
9. Fuel hose obstructed
10. Fuel pump defective (425)
3-4
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Manual
Table of Contents
Remedy
1. Replace bearing
2. Replace crankshaft
3. Replace crankshaft
Remedy
1. Replace gears
2. Replace shaft(s)
3. Replace gears
4. Replace bearings
5. Replace bushing
Remedy
1. Replace gears
2. Adjust backlash
3. Adjust contact
4. Replace bearing
5. Replace gears
6. Replace shaft(s)
7. Replace thrust washer(s)
Remedy
1. Adjust clearance
2. Replace - service seats - valves
3. Replace cylinder head
4. Replace arms - shafts
5. Replace magneto
6. Replace CDI unit
7. Adjust gap - replace plug
8. Replace ignition coil
9. Adjust float height
10. Clean jets
11. Adjust pilot screw
12. Replace ISC
Remedy
1. Shift into higher gear - decrease speed
2. Replace springs
3. Correct timing - check chain, sprockets, and cam chain
tenstioner
4. Replace cam - arms - tappets
5. Adjust gap
6. Replace ignition coil
7. Adjust float height
8. Clean element
9. Clean or replace hose
10. Replace fuel pump
Section
Table of Contents