Arctic Cat 2013 Prowler XT Service Manual page 30

Troubleshooting
Problem: Engine will not start or is hard to start (Compression too low)
Condition
1. Valve clearance out of adjustment
2. Valve guides worn
3. Valves mistimed
4. Piston rings worn - broken
5. Cylinder bore worn
6. Starter motor cranks too slowly - does not turn
Problem: Engine will not start or is hard to start (No spark)
Condition
1. Spark plug(s) fouled
2. Spark plug(s) wet
3. Magneto defective
4. ECM defective
5. Ignition coil defective
6. High-tension lead open - shorted
Problem: Engine will not start or is hard to start (No fuel reaching the fuel injector)
Condition
1. Gas tank vent hose obstructed
2. Fuel hose obstructed
3. Fuel screens obstructed
4. Fuel pump defective
Problem: Engine stalls easily
Condition
1. Spark plug(s) fouled
2. Magneto defective
3. ECM defective
4. Fuel injector obstructed
5. Valve clearance out of adjustment
Problem: Engine noisy (Excessive valve chatter)
Condition
1. Valve clearance excessive
2. Valve spring(s) weak - broken
3. Rocker arm - rocker arm shaft worn
4. Camshaft worn
Problem: Engine noisy (Noise seems to come from piston)
Condition
1. Piston - cylinder worn
2. Combustion chamber carbon buildup
3. Piston pin - piston pin bore worn
4. Piston rings - ring groove(s) worn
Problem: Engine noisy (Noise seems to come from timing chain)
Condition
1. Chain stretched
2. Sprockets worn
3. Tension adjuster malfunctioning
Problem: Engine noisy (Noise seems to come from crankshaft)
Condition
1. Main bearing worn - burned
2. Lower rod-end bearing worn - burned
3. Connecting rod side clearance too large
4. Centrifugal clutch loose
5. Rotor/flywheel loose
Problem: Engine noisy (Noise seems to come from transmission)
Condition
1. Gears worn - chipped
2. Splines worn
3. Primary gears worn - chipped
4. Bearings worn
5. Bushing worn
Remedy
1. Adjust clearance
2. Repair - replace guides
3. Retime engine
4. Replace rings
5. Replace cylinder
6. See Section 5
Remedy
1. Clean - replace plug(s)
2. Clean - dry plug(s)
3. Replace stator coil
4. Replace ECM
5. Replace ignition coil
6. Replace high tension lead
Remedy
1. Clean vent hose
2. Clean - replace hose
3. Clean - replace inlet screen - valve screen
4. Replace fuel pump
Remedy
1. Clean - replace plug(s)
2. Replace stator coil
3. Replace ECM
4. Replace fuel injector
5. Adjust clearance
Remedy
1. Adjust clearance
2. Replace spring(s)
3. Replace arm - shaft
4. Replace camshaft
Remedy
1. Replace - service piston - cylinder
2. Clean cylinder head and piston
3. Replace - service pin - bore
4. Replace rings - piston
Remedy
1. Replace chain
2. Replace sprockets
3. Repair - replace adjuster
Remedy
1. Replace bearing
2. Replace crankshaft assembly
3. Replace crankshaft assembly
4. Tighten - replace clutch
5. Tighten - replace flywheel - crankshaft
Remedy
1. Replace gears
2. Replace shaft(s)
3. Replace gears
4. Replace bearings
5. Replace bushing
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