Troubleshooting - Arctic Cat 2012 DVX 90 Service Manual

FOR ARCTIC CAT ATV DISCOUNT PARTS CALL 606-678-9623 OR 606-561-4983
8. Connect the gasline hose (A) to the carburetor; then
connect the crankcase breather hose (B) to the air fil-
ter housing.
9. Connect the gear shift position switch connectors to
the main harness and secure to the frame with a
nylon tie.
10. Install the left-side footwell mounting plate to the
frame; then install the left and right footwells and
secure to the mountings and fenders. Tighten all
hardware securely.

Troubleshooting

Problem: Engine will not start or is hard to start (Compression too low)
Condition
1. Piston rings worn excessively
2. Cylinder bore worn
3. Spark plug seating poorly
4. Starter motor cranks too slowly - does not turn
5. Valves burned - tappets adjusted too tight
Problem: Engine will not start or is hard to start (No spark)
Condition
1. Spark plug fouled
2. Spark plug wet
3. Magneto defective
4. CDI unit 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 carburetor)
Condition
1. Gas tank vent hose obstructed
2. Carburetor inlet needle defective
3. Fuel hose obstructed
4. Fuel screens obstructed
Problem: Engine stalls easily
Condition
1. Spark plug fouled
2. Magneto defective
3. CDI unit defective
4. Carburetor jets obstructed
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
www.mymowerparts.com
11. Pour the recommended quantity of engine oil into the
crankcase; then install the level stick and fill the
transmission with the recommended amount of gear
lubricant. Install the level plug and fill plug.
YT004A
12. Start the engine and check for any fluid leaks. After a
short "test-ride," shut off the engine and check the
fluid levels. Add fluids as required.
Remedy
1. Replace rings
2. Replace - rebore cylinder
3. Tighten plug
4. See Electrical System section
5. Replace valves - adjust tappets
Remedy
1. Clean - replace plug
2. Clean - dry plug
3. Replace magneto
4. Replace CDI unit
5. Replace ignition coil
6. Replace high tension lead
Remedy
1. Clean vent hose
2. Replace needle
3. Clean - replace hose
4. Clean - replace inlet screen - valve screen
Remedy
1. Clean plug
2. Replace magneto
3. Replace CDI unit
4. Clean jets
Remedy
1. Replace - service piston - cylinder
2. Clean chamber
3. Replace - service pin - bore
4. Replace rings - piston
Manual
Table of Contents
TR028A
43