GENERAL INFORMATION
- 43 -
2. ECU program error or damage
Lean Mixture
The following conditions can cause a lean air/fuel mixture:
1. The injector is clogged
2. The pump pressure is not enough
3. ECU program chaos
4. ECU
damage
5. The pressure sensor, oxygen sensor, solar term door position sensor fault
ENGINE
Engine Smoke
The color of engine smoke can help diagnose engine problems or operating conditions
Black smoke
Black smoke is an indication of a rich air/fuel mixture
Blue smoke
Blue smoke indicates that the engine is burning oil in the combustion chamber as it leaks past worn
valve stem seals and piston rings. Excessive oil consumption is another indicator of an engine that is
burning oil. Perform a compression test to isolate the problem.
White smoke or steam
It is normal to see white smoke or steam from the exhaust after first starting the engine in cold
weather. This is actually condensed steam formed by the engine during combustion. If the UTV is
ridden far enough, the water cannot collect in the crankcase and should not become a problem. Once
the engine heats up to normal operating temperature, the water evaporates and exits the engine
through the crankcase vent system. However, if the UTV is ridden for short trips or repeatedly started
and stopped and allowed to cool off without the engine getting warm enough, water will start to collect
in the crankcase. With each short run of the engine, more water collects. As this water mixes with the
oil in the crankcase, sludge is produced. Sludge can eventually cause engine damage as it circulates
through the lubrication system and blocks off oil passages.
Large amounts of steam can also be caused by a cracked cylinder head or cylinder block surface
that allows coolant to leak into the combustion chamber. Perform a Coolant System Pressure Test.
Low Engine Compression
Problems with the engine top end will affect engine performance. When the engine is suspect,
perform the leak down procedure in this chapter and make a compression test . Interpret the results as
described in each procedure to troubleshoot the suspect area. An engine can lose compression
through the following areas:
Содержание HS700UTV-4
Страница 95: ...SPECIFICATIONS 82 HYDROGRAPHIC CHART Hydrographic chart Pressure splash...
Страница 96: ...SPECIFICATIONS 83 LUBRICATION OIL WAY Hydrographic chart Pressure splashing oil...
Страница 149: ...ENGINE 136 No Part Name Qty Remarks 13 Thermo switch 1 1 For installation reverse the removal procedure...
Страница 242: ...CHASSIS 229 No Part Name Qty Remarks 25 Dust seal 1 26 Caliper piston seal 1 27 Bleed screw 1...
Страница 291: ...CHASSIS 278 No Part Name Qty Remarks 12 Spring washer 8 4 13 Washer 8 16 1 6 2 14 Washer 10 20 2 2...
Страница 293: ...CHASSIS 280 No Part Name Qty Remarks 11 Cross large plate head screw M6 16 4 12 Nut clip M6 4...
Страница 380: ......
Страница 381: ......
Страница 382: ......
Страница 383: ......
Страница 384: ......
Страница 385: ......
Страница 386: ......
Страница 387: ......
Страница 388: ......