Part III Fault Judgement and Repair
11
If gasoline engine is still unable to be started, please send it to authorized dealer of the Company for
overhaul.
Spark detection
(During the spark-over test of the spark plug) Ensure that there is no spilled fuel outside the gasoline engine
and the spark plug is not soaked by fuel.
In order to prevent fire, keep sparks away from spark plug hole.
When doing testing to the spark plug, it is strictly prohibited to hold the spark plug HV wire with wet hand.
When operating, put the fuel switch in the "OFF" position, and drain
off the fuel in the carburetor.
Remove the spark plug cap and spark plug.
Pull the starter handle to release unburned gas out of the cylinder.
Assemble spark plug cap.
Turn the generator switch to the "ON" position.
Ground the negative electrode (threaded part) of spark plug via the
cylinder cover, pull the starter handle to observe the spark condition.
3-1-2 Underpower
Phenomenon
Cause
Remedy
When raising the
throttle, the speed
increases slowly, and
the speed decreases
or the engine shuts
down when it is
serious
Fuel supply
system
There is air in oil way or the oil way
is blocked
Exhaust and dredge oil way
The main measuring hole is
improperly adjusted
Adjust the main measuring hole again.
Needle valve hole and the main hole
are blocked in the carburetor
Clean, and blow through
Fuel tank switch is clogged
Clean and replace damaged part
There is carbon deposit in the
combustion chamber.
Clear carbon deposit
Blockage of air filter
Clean filter element
Poor
compression
Wear of piston, cylinder and piston
ring
Replace worn parts
Air leakage of joint face between the
cylinder body and the cylinder cover
Replace the cylinder pad
Valve clearance is too large (too
small)
Readjust
Valve seal is not tight.
Repair
Compression pressure inspection
