Rato R80, Maintenance Manual, Page: 30 / 79

Part IV Disassembly and Maintenance
26
Phenomenon Cause Remedy
Cylinder
compression
is poor
Fuel
supply
system
is
normal
Normal
ignition
Normal
spark
of the
spark
plug
system
Piston ring wear exceeds the
limit
Replace it with complete set of new ring
Piston ring is broken Replace it with complete set of new ring
Piston ring is stuck Clear carbon deposit
The spark plug is not provided
with sealing gasket or is not
tightened
Mount the gasket and tighten it
Air leakage of joint face
between the cylinder body and
the cylinder cover
Check the flatness of joint face of cylinder pad
and cylinder body and cylinder cover
And tighten cylinder cover bolts according to
specified torque and sequence
Valve leakage
Check valve clearance and valve tightness,
repair when necessary
If gasoline engine is still unable to be started, please send it to authorized dealer of the RATO
Power for overhaul.
⚫
Spark detection
 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.