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We used to display the EFI at the PJS booth at the Nautical Inn.

I still think the green, purple and orange X2 was a great color
scheme.


Bill M.

It has been a lot longer than 3 years since I worked on a Kawasaki
trim problem. Kawasaki's were less popular in So Calif.

What model are you working on, and does it have a trim gauge?

Trim...

The return line restriction is a small ~.020" hole drilled into the rev limiter casting.
So long as the (return) fuel lines are in place and routed from the carb, to the rev
limiter, and from the...

The return line from the carb, is connected to the rev limiter,
and from the rev limiter to the fuel tank?

It was important that the rev limiter was still in place because
there is a restrictor...

That is up to you. Depends on your budget.

There is a very real possibility that you will spend $300 on a new sbn,
and still have a 550 that the engine will die after you fall off, and will ...

Try Watcon.com (Wisconsin)


High performance Mikuni SBN44 carb, with primer fittings installed. Can jet per application for an extra fee, please ask.

You will also need a spacer.


Bill M.

A compression test and a pressure/vacuum test (leak down test) are two completely different
tests. The latter checks the main seals and a few gaskets for pressure or vacuum leaks. The...

Did that carb come off a running 440 or 550?

If the carb came from a ski that was sitting, it is possible the diaphragm
is stiff. That is why I recommended that you rebuild your carb.

But as...

LA Sleeve is another old supplier that says they bore outboard engines.


Bill M.

Try to find an impeller that works with the stock nozzle, instead of the Aluminum
PJS Rip Turn.



The rip turn nozzle ID is huge compared to a stock nozzle, and was designed
a straight pitch...

+1

Tuners used to bend impellers to put a kick on the trailing edge.


Bill M.

Reliability is important to me. That means the ski must be easy to start,
no poor tuning problems at idle or while goofing around, and no engine
seizures.

Another definition of a reliable ski,...

Q&E in Anaheim, CA have been around, seems like, forever.

A couple blocks south of where Westcoast was.



Bill M.

Call and ask, about blind cylinders. I have not needed that kind of work...

It will increase the load, and your engine that is already running lean,
it will run leaner with the 16.5 and no amount of jetting is going to fix it.
The 16.5 will greatly increase the chance of...

563946

This guy was dumb as a rock. I kept sending him pictures of what
I wanted and he sent me pictures of intake manifolds and regular
updraft exh manifolds.

He would text me between in...

563839

Are you using a translator program?

I used this wrench for dual 38's on the X2. Snap-On 13 mm Metric Four-Way Angle Head Open-End Wrench

Regarding the weather, I thought it was really hot and...

The common cause for a runaway engine on any ski is a leaking carb
base gasket. I used to use special Snap-On open end wrench with
(I believe) a 15 degree offset open end on one end, and a 30...

Green gaskets are the thick aftermarket gaskets.

How high? The 550 reed came with 175psi stock.


Bill M.

I think you should try to rebuild the stock carb first.

There is a good chance that any carb you get a hold of, will have a stiff
float diaphragm (including your stock carb), and it will need...

Test your crank case for low spots where the connecting rod slammed against the
cases. If you do not have a flat plate you can use, I can help you make one from
3/16" glass from your local...

The 1986 has more starting problems than any other Jet Ski. But first place
is closely followed by the 87', 88', and 89' JS550's.

When the needle and seat doesn't open, the carb appears to have...

42mm id (not 50mm) PJS side draft exhaust manifold


Thanks


Bill M.

Show us a picture of the piston skirts


Bill M.

Or, perhaps it has a .040" composite head gasket?


Bill M.

The stock 650 pipe is a big POS. It needs a large amount of water
to make the short pipe length work at a decent rpm range (6000 to
6500 rpm). Dried out (if memory serves me) it is tuned for ~7500 ...

I would like to see pictures of the rings (still in the piston). Good shots
of the rings on the exhaust side. Other pics of piston skirts (in & ex),
head & cylinder gasket surfaces.

Thanks
...

There is supposed to be a 1/2 circle (square ring) that locates the
crank shaft into the proper position inside the crank case.

Lots of chatter marks from the crank flexing. That doesn't help, ...

Both PJS and R&D had a similar pipe. But that one is missing the
embossed lettering of both companies.




Which pipe was installed before the FPP?


Bill M.

What I am concerned with is the transition from low speed to high speed.
The low jet, needle & seat and spring combine together to help the carb
transition from low to high speed circuits.
...

As I recall, you are using John's jet specs:

135M
115L
2.3 seat
95gr spring

Did John sell you the Jets, or did you get them somewhere else?

I like those specs, but I prefer a different...

Are you power tuning this in the creek?

The need to jet richer than normal is a sign that there is a problem. You
should resist the urge to jet richer, and take another look at what you
have...

What is the condition of your stock aluminum impeller?

You resealed the pump and the silicone was dry.



Bill M.

Impellers can cavitate through out the entire rpm range.
And even if there...

I will keep a lookout for one.

After you prime the engine, it only runs for a few seconds,
then the engine quits running? I think it is important that
the engine only runs on a prime because that indicates that
the float...

That was a common problem for all 650's in Kawasaki service
departments. Our diaphragm carbs are adversely affected by
problems that barely effect float bowl carbs.

The most common problem is...

An over-pitched impeller accelerates out of the hole, then levels off.

Have you modified the stock exhaust? does it have less water going
into the pipe?

The stock pipe is too short, but it...

It will need to be machined to fit a 650 pump.



That isn't necessary. All of the ski's with a rubber mounted carrier bearing
come without engine shims.



I have never used anything but...

What impeller is installed? A steep pitched impeller will make jetting difficult.

Please test the compression with someone else's compression gauge.
The stock compression is 165psi, but because...

Glad to hear it!


Bill M.

As I recall, that part was a sealing ring, possibly made of carbon and (since it
is missing), may have led to the rubber bellows failing.

I think it would be a good, to try and find one used,...

If our watercraft had a regular float bowl style carb, a fuel pump would
be a good starting point. But the diaphragm carbs watercraft use have
a complicated way of opening the needle and seat. So...

What part #


552803

These parts are on the front or rear E-box on many SeaDoo's 1996 and down.
I will take other parts too.

I also need an overheat buzzer.

Grommet (4 Ways) (Red)
570026800

Grommet (3...