Kawasaki STX-15F service manual Cylinder Head, Cylinder Compression Measurement

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.

•Installter). the spark plugs (see Periodic Maintenance chap-

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).