Subaru Robin EA190V User Manual
Page 21
18
Cylinder pressure check
· Drain the gasoline in the fuel tank into the container.
·Drain the gasoline by loosening the fuel drain bolt of the carburetor
·Remove the spark plug cap and spark plug and install the cylinder pressure meter.
·Forcibly pull the recoil starter several times and measure compression force（Cylinder pressure：0.2Mpa at
500rpm）
4-1-3 Speed unstable
TROUBLE
CAUSE
REMEDY
Piston, cylinder or piston ring is worn excessively.
Replace the worn parts
Piston pin and piston pin hole are worn excessively.
Replace piston or piston pin
Connecting rod small head is worn excessively.
Replace tie rod
Knocking sound
Bearing for crankshaft main shaft is worn.
Replace roller bearing
Engine is too hot
Better ventilation
Too much carbon deposit in combustion chamber
Clear away
Abnormal combustion
Improper gasoline brand or low gasoline quality
Replace with qualified gasoline
There is water in float chamber
Clean
improper spark plug electrodes clearance
Adjust
Spark lacking
Something wrong with ignition coil, and so on
Check and replace damaged parts
Pressure meter