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This is what you can do I think, c I have done this to test lanyards or fess postd Jump wire the post and lanyard from the working machine to the one with issues, if you get 2 beeps and it starts, you know it’s the post or lanyard or . I use retractable set 14 gauge wire that is on a wheel...

For all the readers, before I pull a seadoo motor, I clean each motor mount area and bolt. Then I take scribe, and carefully scribe around the bolt as close to the bolt as possible, and as far “around” the bolt as possible. I then take pictures of the bolts and mounts. I do not normally touch...

GPS is the only way to determine correct speed on any kind of watercraft. These speedometers are quite “ happy”

If you have even a slightly warped cylinder you will have all kinds of water intrusion issues.

Probably the lanyard, I usually replace them in pairs, however the lanyard needs to be reprogrammed.

The return line has a “t” above the carb, The pulse line snakes thru between the rear and front carb to the pulse inlet at the front of the front carb.

You need to test the fuel pressure under load in the water ….old saying,, “ champ on the trailer, chump in the water!” Those plugs never come out looking clean,,, I learned that the hard way,,, the DI’s shut off a cylinder during idle to save fuel, The milk you are seeing comes from the...

Sounds like you have a “current” draw somewhere? I believe you can check this by putting a meter in line between the positive cable and the positive post on the battery? I usually put a text light in series. Turn you can systematically pull fuses, connections to see which one closes the test...

Load test the battrery.

Here’s what we do, pull the rear plug, rotate to just below Tdc, put 1/4 inch rope in there, zRotate pto by hand to put pressure on the rope. Remove grease fitting on the pto. Put a pipe wrench on the pto. Get a long pipe that will fit on the arm of the pipe wrench. Use the leverage of the pipe...

Lol, I am not a newbie, I have been at this since 1996. But DI’s are a PTA to work on,

Try that see what happens.

If the battery passes a load test, then it could be that the rotary valve clearance is too large, This happened to me many many moons ago with a 580, thru the dealer I went thru 2 starters before it was diagnosed by a racer.

Avoid any DI’s at all cost. Getting a working aftermarket fuel pump is very very difficult.

I would load test the battery,,, I experienced similar issues many moons ago!

If you pour some premix into the cylinders does it momentarily start up?

I’m with big dog, pull the motor, split the cases, check the centre brass gear on the crank. Retime your rotary valve, Replace top end parts as needed Go through the carbs while they are out.

Or ,,, just replace the accordion boot, they cannot be that expensive?

Pull the motor Reseal the engine Retime the stator Replace the brushes on the starter while you have it out Replace top end parts as/if needed Retime the rotary valve Measure the rotary valve disc clearance Service the carbs That should put you on the right track.

You are either cavitating, Are over propped Have compression issues I would also check that it is charging properly Load test the battery Change the plugs.