03-11-2010, 09:03 PM #1
- Join Date
- Feb 2008
07 15f low EVEN compression , 11hours 190psi
2007 stx 15f with 11hours on it.. just bought it from a dealer. it was pulled out of the crate in 2009 and used barely for 3 months then winterized... the dealer PDI report shows compression was tested 2 days ago and is 190 dead even on all cylinders. ski seems to run good... ive never owned one to compare it too but it hit 61mph, im a 200 pound guy and it had a full take of gas... it went from 0-about 54 pretty quick just a few seconds..
what would cause low EVEN compression... service manual said 170-260psi..im guessing at 11hours i should be near 260!
03-11-2010, 09:35 PM #2
It's fine-mine does exactly the same, always has. I'm a fat little prick too at about 200 pounds What could cause the compression to be higher-maybe carbon build up on the pistons. You could do another test and get a slightly different number (battery condition throttle position etc), another method could arrive at a variance.
If you want to fully satisfy yourself check the valve clearance quickly.
03-11-2010, 11:51 PM #3
03-12-2010, 12:09 AM #4
I have alot of work to my motor and im hitting 280 PSI. I would be satisfied with 190 with a stock motor.
03-12-2010, 01:09 AM #5
03-12-2010, 02:38 AM #6
260# number is on a 12F I believe, not a 15.
03-12-2010, 09:28 AM #7
- Join Date
- Mar 2008
03-12-2010, 10:13 AM #8
- Join Date
- Feb 2008
i appreciate all the responces... makes me feel better about this.... seems to run fantastic. very very fast machine... impressive.
03-12-2010, 01:03 PM #9Kawasaki 15F specs:
6-20 ENGINE TOP END
Cylinder Compression Measurement
○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.
Do not run the engine without cooling water supply
formore than 15 seconds, especially in high revolutionary
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 primary lead connectors [A].
•Remove: Spark Plugs (see Periodic Maintenance chapter)
•Attach the compression gauge [A] and adapter 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:
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.Torque - Spark Plugs: 13 N·m (1.3 kgf·m, 113 in·lb)
•Install the spark plugs (see Periodic Maintenance chapter).
•Reconnect the primary ignition coil lead connectors, notingthe #1,#4 [A] and the #2, #3 coil connectors. the
#1, #4 coil connector has a red/yellow and a green/blue
leads from the main harness. The #2, #3 coil connector
has a red/yellow and green/black leads from the main
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).
03-12-2010, 02:43 PM #10
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