11-2
Engine
Problem: Engine will not start or is hard to start (Compression too low)
Condition Remedy
1. Valve clearance out of adjustment 1. Adjust clearance
2. Valve guides worn - seated poorly 2. Repair - replace guides
3. Valves mistimed 3. Replace camshaft
4. Piston rings worn - broken 4. Replace rings
5. Cylinder bore worn 5. Replace - rebore cylinder
6. Starter motor cranks too slowly - does not turn 6. See Electrical in this section
Problem: Engine will not start or is hard to start (No spark)
Condition Remedy
1. Spark plug fouled 1. Clean - replace plug
2. Spark plug wet 2. Clean - dry plug
3. Magneto defective 3. Replace magneto
4. CDI unit defective 4. Replace CDI unit
5. Ignition coil defective 5. Replace ignition coil
6. High-tension lead open - shorted 6. Replace high tension lead
Problem: Engine will not start or is hard to start (No fuel reaching the carburetor)
Condition Remedy
1. Gas tank vent hose obstructed 1. Clean vent hose
2. Carburetor float valve defective 2. Replace valve
3. Fuel hose obstructed 3. Clean - replace hose
4. Fuel screens obstructed 4. Clean - replace inlet screen - valve screen
5. Fuel pump defective 5. Replace fuel pump
Problem: Engine stalls easily
Condition Remedy
1. Spark plug fouled 1. Clean - replace plug
2. Magneto defective 2. Replace magneto
3. CDI unit defective 3. Replace CDI unit
4. Carburetor jets obstructed 4. Clean jets
5. Valve clearance out of adjustment 5. Adjust clearance
Problem: Engine noisy (Excessive valve chatter)
Condition Remedy
1. Valve clearance excessive 1. Adjust clearance
2. Valve spring(s) weak - broken 2. Replace spring(s)
3. Rocker arm - rocker arm shaft worn 3. Replace arm - shaft
4. Camshaft worn 4. Replace camshaft
Problem: Engine noisy (Noise seems to come from piston)
Condition Remedy
1. Piston - cylinder worn 1. Replace - service piston - cylinder
2. Combustion chamber carbon buildup 2. Clean chamber
3. Piston pin - piston pin bore worn 3. Replace - service pin - bore
4. Piston rings - ring groove(s) worn 4. Replace rings - piston
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FOR ARCTIC CAT ATV DISCOUNT PARTS CALL 606-678-9623 OR 606-561-4983
www.mymowerparts.com
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