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Did you remove the fuel canister and replace both filters in the fuel tank? I often wonder if anyone does this. These filters can deteriorate and break into small flakes. I'd send off all 4 injectors, fuel and air and have them cleaned. fuelinjectorman.com Good Luck !!

Man you know your shiznit. :D Good Stuff !!

I'm still breaking in rebuilt engines on a 1996 and I can tell you that in a sharp turn the boat will slow down a lot but what boat would not when changing direction. My son's 1996, which he bought new would increase engine RPM if you were at low speed and turned the steering wheel all the way...

Ski should blow through 47mph like nothing. As a few have mentioned, the wear ring is bad or you could be cavitating. Check wear ring first and make sure you have the correct impeller. Good Luck !

Rev limiter on the MPEM. I had a RFI do the same thing at 4170 RPM. I'd play with the throttle and coax it. One out of 20 times I could get it past 4200 and it would shoot up to 6900 and run great. Soon as I let it drop off below 4000 it had the problem every time. I try swapping MPEMs. Or...

Accelerator pump system. You can delete that by installing larger jets. I have never deleted it but sometimes it is difficult process to clear the problems and get good flow and pressure retention. There are good thread on the forum concerning this. For instance there is a small orifice in...

Did you check your fuel pressures? If you have not done it previously it might be time to replace the filters on the fuel canister. First, check the fuel pump pressure with key insertion, then check pressure with the engine running. Make sure the air lines re connected to the rave solenoid...

On a side now the "old" fuel injector guy was very hostile to any type of injector cleaners for injectors. He said all that did was damage the injectors. For the money I send all of mine out and I have spares as well. $25 each it's just worth it to me every time. I'm sure they are good with a...

I know not everyone works on these skis but I know some do or have done so. :D I want to buy a few Connecting Rod Bolts that secure the connecting rod onto the balance shaft. I was told by an engine builder those bolts are 6mmX1.0mmX30mm "hardened." I'm having issues identifying the hardness...

CANDOO The information you seek is on the site. Good Luck !

Rave valves will not stop the ski from starting. By removing them you are creating a situation that is allowing the engine to start. I'm not an engine guru but if it starts with the raves out than the engine is overly rich. I'd check the shot on the injectors. I had a MPEM once that kept the...

I don't have a link but I found a page that told the inside diameter to the corresponding number on the fittings.

Send the injectors to fuelinjectorman.com for a good cleaning and test.

Yep, I've deglazed using 120 grit emery. Go in at a 45 degree in both directions and you are making the cross-hatch. Even a hone doesn't do good cross-hatch. All we do is move the hone quickly through the bore a few times at the end of the process. When my friend bores cylinders, and he has...

The Candoo works on pretty much all the Seadoos. I've used mine on a 2018 Spark. Dennis and Jeff provide terrific support. If you plan on accessing more than a few skis you'll have to purchase the Unlimited plan. My Candoo is more for my own convenience as I don't do much work for other people.

Nah... that's fine. I'm trying to imagine where you are measuring the pistons. The skirt size is very important, at the bottom of the piston. That is the only place we measured the pistons back in the day. The hone is not a big deal at all. You are only breaking the glaze on the cylinder...

Doesn't matter what it says, measurement matters. Measure the piston skirt at the bottom. I think max is .008" I mic everything but generally they always get new pistons and a complete top end. I've only taken one engine apart that was in spec and it was at the very top of the spec. Most...

Find a better ski to restore. LOL I would take it if you paid me to take it. :D :D

Without looking at the engine it may utilize another path. The only thing "not having the check valve" would have done for performance was give you an air leak and the ski would run lean. Lean is always fast until it melts parts. :) The check also provides crankcase ventilation which removes...

Left side is not reading low RPM. It is surprising how much you need the tachs so balance power deliver.