There Is Abnormal Noise When Engine Running - DUROMAX XP7HPE Owner's Manual

NOTE: the gasoline should run under certain temperature. Generally, permitting temperature at the
flow guard outlet is between 80-110℃, while the temperature of the crankcase is about 60℃ under
the magneto. If temperatures surpass the limits, it is an indication that the gasoline engine is
excessively hot.
VI. THERE EXISTS ABNORMAL NOISE WHEN ENGINE RUNNING
TROUBLE
Abnormal noise
There is an abnormal
noise during
combustion
The other
Dirt or something like this fill up
among air cooling fins
Cooling fan is loosen, losing
function
The rod deformation makes
piston and cylinder bushing side
wear
Cylinder or piston or piston ring
is worn, resulting in air flow
between cylinder and crankcase
Improper adjustment of engine
speed produces
rotational speed
Crankshaft main bearing is burnt
out
CAUSE
Piston, piston ring or cylinder is
worn
Tie rod or piston pin and piston pin
hole is worn
Crankshaft main bearing is worn
Piston ring is broken
Too much carbon deposit in
combusting chamber
Too small electrode clearance of
spark plug
Engine is flooded with fuel
Improper fuel brand
Engine is excessively hot
Improper valve clearance
Fly wheel is not connected with
crankshaft tightly
Clear away dirt or something like
this
Reinstall well
Replace tie rod
Replace the worn
Readjust engine speed to proper
excessive value by speed regulator
Replace main bearing
Replace the worn
Replace the worn
Replace
Replace
Clear away carbon deposit
Adjust
properly
Check relative parts such as
carburetor
Replace fuel
Find a cause and eliminate it
Readjust
properly
Connect tightly
21
REMEDY
electrode clearance
calve clearance