Installation Guide

Common Faults and Repair Methods of Engine
Number Fault Check
8 Pressure of engine
oil is low
1. Not enough oil in the oil pan
Dealing method: add oil to the selected level
2. Damage of oil pump gear
Dealing method: replace the oil pump
3. Blockage in the oil strainer or the oil lter
4. Damage or blocking in the relief valve or the pressure
stablizer spring
5. Blockage or leakage in the oil line
Dealing methods for Item 3, 4 and 5: replace parts.
9 Temperature of
engine coolant is
too high
1. Water thermostat is stuck, method; check and replace
thermostat
2. Coolant; test and replace if necessary
3. Engine load if too much; Reduce load
4. Check for proper ventilation around radiator air intake vent
10 Starter fault 1. Starter will not engage.
2. Week starter engagement.;
3. Starter disengagement is slow or delayed;
Prevention method; Check battery connections and voltage.
11 Mufer with black
smoke
1. Check air lter for blockage or obstructions.
2. Pressure regulating valve does not work normally
Prevention method: Adjust the screw on the valve
3. Ignition timing too early, adjust ignition timing
4. The spark plug does not function normally
5. Ignition wires do not function normally
6. High pressure fuel line does not work normally
Project 4, 5, and 6 handling method: replace the related
accessories
12 Mufer with blue
smoke
1. Check engine oil level, if too much, drain excess oil
2. Replace piston ring
3. Overhaul or replace piston and ring.
13 Mufer with white
smoke
1. Engine preheating
2. Water in the cylinder, check head gasket, overhaul the
engine cylinder if needed
14 Mufer with are
up and backre
1. Carburetor oater oil level is too high, adjust the oater
2. Exhaust valve is not totally sealing, polish the valve
3. Ignition timing too late, adjust the ignition timing
15 Load speed, drops
too much
1. Clogged fuel line (check and clean fuel line)
2. Dirty air lter (clean the air lter)
3. Improper valve clearance (repair and adjust)
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