CFMoto UTV Terracross CF625-3, CF500-6, CF625-6. Service Manual - part 9

Engine Backfires

Possible Cause

Solution

Weak spark from spark plug

Inspect, clean and/or replace spark plugs

Incorrect spark plug gap or heat range

Set gap to specs or replace plugs

Old or non-recommended fuel

Replace with fresh recommended fuel

Incorrectly installed spark plug wires

See your dealer

Incorrect ignition timing

Mechanical failure

See your dealer

See your dealer

Loose ignition connections

Check all connections and tighten

Water present in fuel

Replace with fresh recommended fuel

Engine Pings or Knocks

Possible Cause

Solution

Poor quality or low octane fuel

Replace with recommended fuel

ncorrect ignition timing

See your dealer

Incorrect spark plug gap or heat range

Set gap to specs or replace plugs

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Engine Runs Irregularly, Stalls or Misfires

Possible Cause

Solution

Fouled or defective spark plugs

Inspect, clean and/or replace spark plugs

Worn or defective spark plug wires

See your dealer

Incorrect spark plug gap or heat range

Set gap to specs or replace plugs

Loose ignition connections

Check all connections and tighten

Water present in fuel

Replace with new fuel

Low battery voltage

Recharge battery to 12.8 VDC

Kinked or plugged fuel tank vent line

Inspect and replace

Incorrect fuel

Replace with recommended fuel

Clogged air filter

Inspect and clean or replace

Other mechanical failure

See your dealer

Low or contaminated fuel

Add or change fuel, clean the fuel system

Low octane fuel

Replace with recommended fuel

Clogged fuel filter

See your CFMOTO

 

dealer

Fuel is very high octane

Replace with lower octane fuel

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Engine Stops or Loses Power

Possible Cause

Solution

Out of fuel

Refuel

Kinked or plugged fuel vent line

Inspect and replace

Water is present in fuel

Replace with new fuel

Fouled or defective spark plugs

Inspect, clean and/or replace spark plug

Worn or defective spark plug wires

See your dealer

See your dealer

Incorrect spark plug gap or heat range

Set gap to specs or replace plug

Loose ignition connections

Check all connections and tighten

Low battery voltage

Recharge the battery to 12.8 VDC

Incorrect fuel

Replace with fresh recommended fuel

Clogged air filter

Inspect and clean or replace

Other mechanical failure

verheated engine

Clean radiator screen and core, clean

 

engine

 exterior, see your dealer

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