Engine Principles And Operating Requirements; Starting The Engine - Hisun HS700UTV-4 Maintenance Handbook

By following a systematic approach, the possibility of unnecessary parts replacement can be avoid,
always start with the simple and most obvious checks when troubleshooting, This would include the
engine stop switch, fuel quantity and condition, fuel vale position and spark plug cap tightness
Proper maintenance as described in Chapter Three reduces the necessity for troubleshooting.
Even with the best of care, however, the motorcycle may develop problems that require trouble
shooting.
If the problem cannot be solved. Stop and evaluate all conditions prior to the problem. If the
motorcycle must be taken to a repair facility, the mechanic will want to know as many details as
possible.
For removal, installation and test procedures for some components, refer to the specific chapter.
When applicable, tables at the end of each chapter also provide specifications and service limits.

ENGINE PRINCIPLES AND OPERATING REQUIREMENTS

An engine needs three basics to run properly:
Correct air/fuel mixture
Compression
A spark at the right time
If one basic requirement is missing the engine will not run.
When experiencing engine-starting troubles, it is easy to work out of sequence and forget basic
starting procedures. The following sections describe the recommended starting procedures.
Several special faults and countermeasures of EFI engine system
1.Special fault：
Idle speed is too high at starting moment。
The engine start normally, the engine speed will be a little higher than normal idle speed
(1400rpm) within the first 10 seconds. According to different temperature of engine coolant, the
process will continue from several seconds to tens of seconds.
Finally, the engine speed will decrease to normal idle speed automatically.
Reason: The intelligent control function of EFI automatically forces to complete the engine
warm-up process and enhance the oil pressure to correct level at the same time.
Result: Ensure the engine can work with steady idle speed and conducive to complete the
engine warm-up process quickly after start engine in low temperature.
GENERAL INFORMATION

STARTING THE ENGINE

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Engine runs