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12.7 when not running doesn't sound like a dead battery. Did the starter engage? With beeping it may be a DESS problem. Check the service manual for DESS beep codes.

Are you sure you fully resolved the fuel pressure issue? Can you monitor fuel pressure while it is happening? Steady fuel pressure confirms performance of the air + fuel system so that is why it is so important in DI troubleshooting. Are you getting a Maint light?

Your earlier post about seeing 65 PSI with key on and engine off points to a regulator problem. Not too expensive or hard to replace so thats what I would do next.

The 2nd time i needed one I had success searching Facebook Marketplace. Then I resold it the same way when I was finished.

Sent you a PM of a guy in NE Houston that had one in 2022.

My solution was to buy a spare and cut it in two.

Looks aftermarket. You will need to trace it and see where it goes and why it is there. From memory, my 2000 GTX DI only has 1 solid red wire coming off the positive terminal.

I dont remember the specs but the service manual for your model should have a test procedure and specs. SeaDoo Manuals - FREE PDF Download!

In theory either the fuel pressure or air pressure regulator could be bad, but it is far more likely that the pump is the issue. DI pumps have a pretty high failure rate, especially as they age. It may be possible to clean it by running it in a bucket of solvent. Search for prior threads on...

Regardless of fuel pressure, which you absolutely need to check, sending off the fuel injectors for testing and cleaning is a good move. I used Yamaha Fuel Injectors a few years ago for my DI injectors. It may be a clogged injector or poor fuel pressure that led to the engine failure in the...

Check out PDF page 349 of the manual here: https://seadoomanuals.net/download/pdf/service/manuals/2002/2002-seadoo-shop-manual-2.pdf I think you are referring to the hose that connects to the throttle body, which is on the other side of the engine. And you have my prayers for taking on a...

That is the air supply line to your RAVE solenoid. Without it, the RAVE valves will not function at high RPM's. See page 06-03-30 of the 2001 Service Manual.

SeaDoo Manuals - FREE PDF Download!

I would suggest starting with fuel pressure. It requires air pressure to be in spec to measure properly, so you can somewhat test both at the same time.

This question has been asked before if you search around. I have a DI and they are amazing when they run well, but age is catching up to them (especially the complex fuel system) and I would recommend staying away for short term use. They are fun to own and maintain if you are capable and...

I believe the 1st and 2nd connect together. See this discussion for reference: 2004 sportster 951di, line routing on compressor question The 3rd picture is for fogging the engine. Nothing connects there in normal operation.

The image you posted is from an aftermarket Quantum pump. It has a different design from OEM. If you have the same pump, you need to contact Quantum for parts.

I have no data or experience to support this comment, but I would only feel comfortable dragging a ski by the front hook. The rear just seems less robust.

There is a procedure for running the engine on a garden hose. If you turn on the hose before you start the engine (or turn the engine off while still on hose pressure) you will fill the cylinders with water. Which is why the question was asked. You may not have nearly the big issue you suspect.

My unprofessional opinion from doing my own SeaDoo with a similar stack of shims... you are close enough. I was similarly shocked how many shims were needed. Only thing I can figure is those mounts must really sag/compress over time.