Arctic Cat 2018 ZR 200, Service Manual

Page: 29 / 70

28
Troubleshooting Engine
Problem: Engine Does Not Start (No Spark at Spark Plug)
Condition Remedy
1. Ground connections dirty — loose
2. Wiring harness shorting — disconnected
3. Emergency stop switch in DOWN position — malfunction-
ing
4. Spark plug fouled — damaged
5. RPS/idle switch — malfunctioning
6. Ignition key switch in the OFF position
1. Check all ground connections — clean and tight
2. Repair — replace — connect wiring harness
3. Move switch to UP position — test/replace ignition key
switch/emergency stop switch
4. Clean — replace spark plug
5. Fully seat cable in control housing — adjust throttle cable
tension — replace faulty switch
6. Turn ignition key switch to the ON position
Problem: Engine Does Not Start (No Fuel at Cylinder)
Condition Remedy
1. Gas tank empty
2. Gasoline contaminated
3. Fuel hose broken — pinched
4. Gas-tank vent — hose obstructed
5. Compression absent
1. Fill tank
2. Replace gasoline
3. Replace — service hose
4. Remove obstruction — replace vent — hose
5. Repair — replace damaged — worn engine components
Problem: Engine Does Not Start (Fuel Does Not Ignite)
Condition Remedy
1. Valve clearance poor
2. Spark absent
3. Compression low
4. Engine flooded
5. Gasoline contaminated
1. Inspect valves
2. Check for spark — see No Spark at Spark Plug sub-section
3. Service engine
4. Clear engine (using a shielded safety stand, elevate the rear
of the snowmobile and hold throttle full-open)
5. Clean tank and entire fuel system
Problem: Engine Does Not Idle
Condition Remedy
1. Throttle stop screw turned out too far
2. Idle fuel adjuster screw out of adjustment
3. Air silencer obstructed
4. Drive clutch dirty
1. Adjust throttle stop screw
2. Adjust idle fuel adjuster screw
3. Clean air silencer
4. Clean drive clutch
Problem: Engine Loses Power
Condition Remedy
1. Spark plug fouled
2. External coil faulty
3. Gas tank vent — hose obstructed
4. Compression low
5. Muffler restricted
1. Replace spark plug
2. Service — replace coil
3. Service — replace vent hose
4. Service engine
5. Inspect muffler
Problem: Engine Overheats
Condition Remedy
1. Drive system adjusted incorrectly — worn — damaged
2. Rings/grooves carboned
3. Exhaust obstructed
4. Compression low — absent
5. Engine shroud obstructed
1. Troubleshoot — adjust drive system
2. Clean — replace rings — pistons
3. Remove obstruction
4. Repair — replace damaged — worn engine components
5. Clean shroud
Problem: Engine Backfires
Condition Remedy
1. Spark plug fouled — damaged
2. RPS/idle switch — malfunctioning
1. Clean — replace spark plug
2. Fully seat cable in control housing — adjust throttle cable
tension — replace faulty switch
Problem: Engine Stops Suddenly
Condition Remedy
1. Gas tank empty
2. Spark absent
3. Fuel filter obstructed
4. Fuel hose obstructed — broken — pinched
5. Ignition coil faulty
6. Engine seized
7. Oil level low
8. RPS/idle switch — malfunctioning
9. Wiring harness shorting — disconnected
1. Fill tank
2. See No Spark at Spark Plug sub-section
3. Replace filter
4. Remove obstruction — repair — replace fuel hose
5. Replace ignition coil
6. Overhaul engine
7. Add recommended oil
8. Fully seat cable in control housing — adjust throttle cable
tension — replace faulty switch
9. Repair — replace — connect wiring harness