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**Bryan Glynn** · 09-21-2002, 10:15 PM

You may have several issues...

First, what is your exact flushing procedure step by step?

Second, please verify that gauge on another ski, or try another guage on yours. The odds of having both cylinders exactly 25 spi low is very unlikely.

Some condensation on the plugs after sitting is normal under some circumstances - i need your answer to #1 before commenting.

Forth, speedometer readings are completely meaningless. RPM is the measure of an engine's performance. You should see at least 6800 RPM from yours.

**h1dave** · 09-22-2002, 11:17 AM

my flushing procedure use to be , hook up hose, turn on hose 1/2 turn, the two outlets would spray about 4 feet. within a minute i would start ski and run for 5 mins. i would then turn off hose and run for 10 more seconds.
now i start ski first and then turn on hose and repeat as above!
i always blip the gas a few times after i turn off the hose.
i will buy a new compression tester today!
thanks for your quick reply bryan [img]smile.gif[/img]

**DRL** · 09-22-2002, 07:01 PM

h1dave
Dosen't stock the 951 have a 6.0:1 compression ratio?
At 125 psi you are showing 7.25:1?
I have read in some of these post that a
2 cylinder should have 140-150psi how can
this be with a 6.0:1 cp.
Sea-Doo says that you can run 87 octane
unleaded regular gas that would seem to be about right with a 6.0:1 motor. It would also
seem to me that 91 or 93 octane would run
rich in a stock motor.
Help me out here Bryon.
Doug
PS: love the site

**Bryan Glynn** · 09-22-2002, 07:13 PM

H1 - your 'new procedure' is correct, as long as you follwed that you should be alright. If you followed your first procedure, I would expect water in your engine as you described, and low compression from possible scoring.

Let us know what your new gauges says.

DRL - I'd have to check the CCR of the 951 against the manual, I don't know it off the top of my head - but 150+ cranking compression is normal.

**h1dave** · 09-23-2002, 12:15 AM

hey guys
i checked out my compression gauge on my h1
race bike. it showed 170 psi. the gauge is correct!
would sbt send me a rebuild with 125 psi ???
if i do have a small water leak what is the likely place to check.
is there a water pressure check i can do??
thanks in advance!!!
dave

**Bryan Glynn** · 09-23-2002, 12:35 AM

No, 125 is below the standard. Call me Monday and I'll lookup the specs it shipped out with. Either way we need to swap that with you, it has damage.

**Bill O'Neal** · 09-23-2002, 10:42 AM

Brian,
A 951 stock normally blows 140 psi on a calibrated guage, at sea level, not 150.

Water can intrude into the clyinder that has the exhaust port open when the engine is shut off from condensation of moisture in the exhaust system/muffler. Droplets will form on the chamber and sparkplug.

It is important to blow as much water out as possible after riding, then fog the motor before you store it, even for one day.

**DRL** · 09-24-2002, 07:29 PM

Sorry all
But I still don't under stand how a 6.0:1 motor
can have 140 psi.
140 is 8.0:1
Doug

**Bill O'Neal** · 09-24-2002, 09:05 PM

Doug,
You cannot calculate ccompression ratios by using pumping numbers. Pumping numbers are relavent to cranking speed and many other factors.....

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new sbt compression??

new sbt compression??

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