Cylinder Compression Test - Kohler SFGLD480 Operation & Maintenance Manual

Gas and Ethanol Engines: Insert the tool washer in the place of the spark plug,
to ensure adequate cylinder sealing (Fig. 1).
Fig.1 - Special tool
Mount the compression pressure gauge on the tool in the cylinder.
Rotate the engine with the starter, until the line marking on the pressure-recording card stops (normally this
-
takes 4 to 6 seconds). If unsure, repeat this step. We recommend writing down the number of the cylinder
tested.
- Press the discharge valve of the pressure gauge until the pointer indicates zero.
- Test the remaining cylinders similarly, in correlative order.
ATTENTION
The table below shows compression test values for Kohler engines: These values are for guidance only, since
compression checks differ if performed on a hot or cold engine; therefore what really matters is the reading
variation among all the cylinders. So, if the compression pressure difference of one cylinder is 2-3 kg/cm
than for the rest of cylinders, then this cylinder needs servicing.
GAS ENGINES
ETHANOL
DIESEL
DUALFUEL ENGINES
PRODUCT INFORMATION
IO-C-M-00-006e
KOHLER ENGINE

CYLINDER COMPRESSION TEST

RG ¼" – 19 threads
LCR
FGLD
SFGLD
SFGM
HGM
SFE
TA Y TAB
F180
5.2.20
INDEX DATE
A
February 2012
O&M_2.002211.810_A_10_2016
) with a copper
12-15 kg/cm
14-18 kg/cm
21-24 kg/cm
14-18 kg/cm
19-23 kg/cm
Dep.2
2
lower
2
2
2
2
2
2/3