Kawasaki STX-15F - Manual (Page 198)

6-20 ENGINE TOP END
Cylinder Head
Cylinder Compression Measurement
NOTE
○
Use the battery which is fully charged.
•
Thoroughly warm up the engine, while checking that there
is no compression leakage from around the spark plugs
or the cylinder head gasket.
CAUTION
Do not run the engine without cooling water supply
for more than 15 seconds, especially in high revolu-
tionary speed or severe engine and exhaust system
damaged will occur.
•
Stop the engine.
•
Remove the front storage pocket (see Hull/Engine Hood
chapter).
•
Disconnect both two connection on the ignition coil pri-
mary lead connectors [A].
•
Remove:
Spark Plugs (see Periodic Maintenance chapter)
•
Attach the compression gauge [A] and adapter [B] firmly
into the spark plug hole.
•
Using the starter motor, turn the engine with the throttle
fully open until the compression gauge stops rising; the
compression is the highest reading obtainable.
Special Tools - Compression Gauge, 20 kgf/cm²: 57001-221
Compression Gauge Adapter, M10 × 1.0:
57001-1317
Cylinder Compression
Usable Range: 1 185 ∼ 1 795 kPa (12.1 ∼ 18.3 kgf/cm²,
172 ∼ 260 psi) @430 r/min (rpm)
•
Repeat the measurement for the other cylinders.
•
Install the spark plugs (see Periodic Maintenance chap-
ter).
Torque - Spark Plugs: 13 N·m (1.3 kgf·m, 113 in·lb)
•
Reconnect the primary ignition coil lead connectors, not-
ing the #1,#4 [A] and the #2, #3 [B] coil connectors. the
#1, #4 coil connector has a red/yellow and a green/blue
leads from the main harness. The #2, #3 coil connec-
tor has a red/yellow and green/black leads from the main
harness.
NOTE
○
The service codes (COIL1 and COIL2) caused by this
procedure are stored in the ECU. If necessary, these
service codes can be erased by using the Kawasaki
Diagnostic System (KDS).