GENERAL INFORMATION
1-40
6. Incorrect float level adjustment.
7. Plugged carburetor jets.
NOTE
If a warm or hot engine will start with the choke on, or if a
cold engine starts and runs until the choke is turned off.
The pilot jet is probably plugged.
8. Contaminated or stale fuel.
9. Clogged air filter.
10. Intake pipe air leak.
11. Plugged exhaust system. Check the silencer or muffler, especially if the utility terrain vehicle was
just returned from storage.
12. Faulty ignition system component.
Engine Backfires, Cuts Out or Misfires During Acceleration
A backfire occurs when fuel is burned or ignited in the exhaust system.
1. A lean air/fuel mixture can cause these engine performance problems. Check for the following
conditions:
a. Incorrect float level adjustment.
b. Plugged pilot jet or pilot system.
2. Faulty accelerator pump.
3. Loose exhaust pipe-to-cylinder head connection.
4. Intake air leak.
5. Incorrect ignition timing or a damaged ignition system can cause these conditions. Perform the Peak
Voltage Tests to isolate the damaged ignition system component. Check the ignition timing as
described.
NOTE
The ignition timing is controlled by the ICM and cannot
be adjusted. However, checking the ignition timing can
be used to diagnose problems.
6. Check the following engine components:
a. Broken valve springs.
b. Stuck or leaking valves.
c. Worn or damaged camshaft lobes.
d. Incorrect valve timing due to incorrect camshaft installation or a mechanical failure.
Engine Backfires on Deceleration
Summary of Contents for UTV 700 2009
Page 1: ...HUANSONG UTV 700 SERVICE MANUAL 2009 ...
Page 96: ...GENERAL SPECIFICATIONS 2 23 HYDROGRAPHIC CHART Hydrographic chart Pressure splash ...
Page 97: ...GENERAL SPECIFICATIONS 2 24 LUBRICATION OIL WAY ...
Page 246: ...5 31 BRAKE SYSTEM No Part Name Qty Remarks 26 Caliper piston seal 1 27 Bleed screw 1 ...
Page 330: ...CHARGING SYSTEM 6 18 CHARGING SYSTEM CIRCUIT DIAGRAM Ignition coil C D I Magneto Rectifier ...