Sea Doo compression question

Jim · Joined: 18 Aug 2007 Posts: 2

I'm sure this question has been asked a couple of hundred times, but I
couldn't seem to find an answer ........ so I'll ask it again. What's
should be the normal compression readings (new engine ? .... engine with
average wear ? .... and an engine in immediate need of a rebuild ?) for the
infamous 1999 Sea Doo 947. I've been blessed with owning a '99 GSX Limited,
and a '99 GTX Limited, both of which seem to be lacking a bit of compression
lately. We must have left some of it out on the lake.

Thanks for the info ........ Jim

Archived from group: rec>sport>jetski

Tim · Joined: 18 Aug 2007 Posts: 5

My 02 XP reads 135psi and has about 30 hours on it. I think gauges seem to
read different depending on what you have.

"Jim" wrote in message$Jw6.6644109@news1.news.adelphia.net...
> I'm sure this question has been asked a couple of hundred times, but I
> couldn't seem to find an answer ........ so I'll ask it again. What's
> should be the normal compression readings (new engine ? .... engine with
> average wear ? .... and an engine in immediate need of a rebuild ?) for
the
> infamous 1999 Sea Doo 947. I've been blessed with owning a '99 GSX
Limited,
> and a '99 GTX Limited, both of which seem to be lacking a bit of
compression
> lately. We must have left some of it out on the lake.
>
> Thanks for the info ........ Jim
>
>

Bill O'Neal · Joined: 18 Aug 2007 Posts: 27

140-145 psi at sea level with a calibrated guage.

When you have lost 10 psi, it's time to rebuild.......

Bill O'Neal
WCM
"Tim" wrote in message$9t2.520@newssvr17.news.prodigy.com...
> My 02 XP reads 135psi and has about 30 hours on it. I think gauges seem to
> read different depending on what you have.
>
>
> "Jim" wrote in message
> $Jw6.6644109@news1.news.adelphia.net...
> > I'm sure this question has been asked a couple of hundred times, but I
> > couldn't seem to find an answer ........ so I'll ask it again. What's
> > should be the normal compression readings (new engine ? .... engine with
> > average wear ? .... and an engine in immediate need of a rebuild ?) for
> the
> > infamous 1999 Sea Doo 947. I've been blessed with owning a '99 GSX
> Limited,
> > and a '99 GTX Limited, both of which seem to be lacking a bit of
> compression
> > lately. We must have left some of it out on the lake.
> >
> > Thanks for the info ........ Jim
> >
> >
>
>

Scottspjs · Joined: 18 Aug 2007 Posts: 7

oh man,Bill if George sees this one he will blow a gasket."how many times have
i told you a compression gauge is no good" blah blah blah blah

Bill O'Neal · Joined: 18 Aug 2007 Posts: 27

Yeah, I have one attached to my phone. Can't wait for the call.

Bill O'Neal
WCM
"Scottspjs" wrote in message@mb-m13.news.cs.com...
> oh man,Bill if George sees this one he will blow a gasket."how many times
have
> i told you a compression gauge is no good" blah blah blah blah

Jim · Joined: 18 Aug 2007 Posts: 2

It doesn't sound like this is a question of a good gauge or a bad gauge, I'm
using a relatively new Snap-On gauge .... however I'm only getting 96 out of
one cyl, and 92 out of the other, but on my neighbors boats it reads a happy
138. Sounds like its time for this GSX to go into the shop for a while.
Thanks again for the confirmation.

Jim
"Jim" wrote in message$Jw6.6644109@news1.news.adelphia.net...
> I'm sure this question has been asked a couple of hundred times, but I
> couldn't seem to find an answer ........ so I'll ask it again. What's
> should be the normal compression readings (new engine ? .... engine with
> average wear ? .... and an engine in immediate need of a rebuild ?) for
the
> infamous 1999 Sea Doo 947. I've been blessed with owning a '99 GSX
Limited,
> and a '99 GTX Limited, both of which seem to be lacking a bit of
compression
> lately. We must have left some of it out on the lake.
>
> Thanks for the info ........ Jim
>
>