1996 SPI Cooling

[gengljer]

Ok, briefly I've came here after frantically searching the internet for assistance. Local shop is 3 to 5 weeks behind..as usual..and you can't tell that to 2 young boys..anyway..

1996 See Doo SPI cooling issue. With the flush hose attached, I do get back pressure through the block and through the one cooling indicator hose on the back, but nothing through the one on the exhaust housing. The problem exists with the craft in the water as well.

I have checked all hoses for any possible clogs etc. The service manual isn't real clear on the operation of the cooling system. I do not believe there is a so called water pump and am not sure of what to check next. I have taken the complete exhaust system off and verified nothing is clogged there.

What's next? Any help would be greatly appreciated.

 

[kustomkarl]

Welcome to the seadoo forum gengljer. The cooling problem might be in one of the elbows might be clogged or it cold be in the water jacket in and around the head of the engine. If you pulled off all of the lines and fittings and replaced and it is still overheating it might be in the passages in the head or cylinder itself. Do you have a seadoo shop manual? If not here’s an idea for you. You could join as a "premium member". As a premium member you can down load a authentic seadoo manual from the seadoo manual library. In the library is a variety of manuals for almost all years and models. You can view as many as you like on line as a PDF file, or download it and print it for your personal and private use. There are operator manuals and repair manuals for you to do your own repairs on your seadoo. The repair manuals have everything from troubleshooting, repair procedures to winterizing. It contains wire diagrams torque specs and pictures for disassemble and assemble instructions. In the spec sheets it tells everything needed to maintain oil changes, spark plug gaps, carburetor rebuilds and impeller wear ring tolerances. Click on the "Seadoo Manuals" link at the top of the page for more details. If you need any help or get in a jam, we are always here to answer your questions too. Premium members get priority when it comes to getting quick detailed answers.


Karl

 

[RX951]

th ejet pump is the water pump also. there is a port in the jetpump that supplies water to the motor. under a flush, if water comes out of the jet pump, then that supply is clear. you must have some other sort of plugging taking place in the cooling system. Has the ski been run aground in some mud? that can easily clog the system. Have you tried pinching some hoses under the flush to see if it will force and unplug the other line(s)? pinch the outlet leaving the cylinder head while on a flush

 

[seadoosnipe]

If I understand....

If I understand you correctly, your not getting water from your "tale-tell" line that leads from your exhaust....is that correct?

If so, you'll notice the elbows coming from the tuned pipe. Well, these are calibrated for water flow. If you notice the number stamped on the side, you'll be able to determine the flow rate........anyway, remove that elbow and check for sand grit or any other debris.

The water to your engine "t's" off when it comes in thru the hull. One of the lines supplies water to the tuned pipes preheat section before it goes into your engine, the other line is for direct cooling water injection. You need to make sure this like and elbow is free of foreign matter too.

It's very important that you have cooling water flowing from the exhaust. This will directly have an impact on the performance of the craft.

 

[RX951]

Here is your cooling system. Check every port, elbow. Blow with compresses air if needed. especially the two at the rear

 

[gengljer]

To all that have replied in help...

Thanks for the assistance..

I've taken off every hose and every connection and have been able to blow through them all with no problem. Using my own blow power...not compressed...

The engine block could be the part I need to look at. I'm actually going to float test it again tomorrow and see, I'll keep you posted.

To answer a few of the questions...

With the backflush hose attached to the garden hose and pinched between the connector and the flush hose, I can force water back through the block and out of the hose leaving the top of the block.

I think that is clean.

I get absolutely zero water coming from the exhaust indicator hose.

I have checked everything clean here, and am gaining more confidence in looking at it, and I will hopefully add more tomorrow.

Sorry for the late replies to everything. Lighting strike took out Power Supply on computer...fortunately....

 

[gengljer]

Update

Good News, by taking apart the entire system, and blowing everything out, I have cooling. I don't think it is what it once was, but it certainly under power in the lake gets plenty of cooling.

It used to give adequate cooling idleing, so I'm going to take it apart one more time and clean and flush the system again.

As a note, the lake I run in, is very dirty, so the idea of possible mud/muck looks to be the cause.

Thanks for all the assistance.