Recent content by jakknz

The idle screw is located on the forward top section of the carbs. You should make sure that the throttle cable has slack in it too. If the cable is too tight it will rev out of control or "run-away". Best thing to do when this happens is pull the choke and it should cut it off. The throttle...

I did some surgery yesterday to figure this out. There isn't anything in there, just a VERY small hole for fuel flow. Will try to post some pics of the carnage soon. All I can say is to make sure you clean this fitting properly, it can clog very easily. Thanks for the help guys :-)

It's not one you can see though, it's internal and would be inside right around the area my arrow is pointing to. Using your link, the parts catalog includes what I pictured above as an assembly - P/N 270500405 - and that's as far a breakdown as I can get. I think the only way to check it...

Exactly! Right where the hose connects is the barb that's inserted into the cover. I think there is a check feature there. I'm sure Seadoo put it there for a reason, and running without it seems to not be a good idea. I just wanted to know if anyone else had first hand experience with it...

Exactly. So on the one set of carbs, the "FUEL" fitting flows only in the direction of the arrow in my pic. On the other set, the fitting is free flowing which would allow a backflow. Again thanks for the help, I couldn't come up with much info on any of my searches. When you did the write...

Thanks for the response! 1998 GTX Ltd 2000 GTX Both are mostly the same plumbing wise. It’s not the fuel inlet on the mag carb - I’ve attached a picture for clarification showing the one I’m talking about.

For TLDR summary, see bottom So 951 carbs have a "PULSE" cover plate with a barb attached on the mag carb and a "FUEL" cover plate with a barb attached on the PTO carb - both located on the fwd side of their respective carbs, you can see"PULSE" or "FUEL" words in raised letters on each. The...

Excellent write up. I want to thank you for your time making this post and let you know that it will help several people even if they don't post about it here. It's helped me as I will be cleaning/rebuilding them prior to the riding season. You forgot to mention what your beverage of choice...

Honestly, there are so may variables in the fuel system that it's hard to pin it down to the turn of a screw and I'm not very familiar with your carb set up. We've given some good suggestions of things to check here. I would recommend going through your fuel system as indicated in the posts...

You need to do the basics first in this order: 1) compression test with valid compression tester to determine the health of your top end 2) rebuilding carbs with genuine Mikuni parts and going through and cleaning/replacing all fuel lines, fuel selector valve, and testing pop off pressures...

What you've listed is a great start. Do all of those things (in addition to the "Should I also..."). Ride and have fun. Keep in mind without opening up the engine you may have a ticking time bomb on your hands. It may run but none of us know how long it will be because you don't know the...

Oil injection is the best, but you need to test the system to insure it's working properly and is varied throughout the RPM range to give the engine what it needs. Less oil at idle, high output at full throttle. You will save money in oil. My personal opinion - if you're the only one to be...

https://osdparts.com/index.php?main_page=advanced_search_result&search_in_description=1&keyword=420837392+&x=18&y=12 is another good place to order the part.

No problem. I've recently rebuilt a 951 engine with a pto side piston seizure that looked very similar to the pictures you posted. I found the internal carb filter clogged and also found that the fitting on the carb that the fuel line attached to was clogged. The ski had been sitting for a few...

I wanted to add but couldn't edit for some reason: As for the head, we may need more pictures to assess the damage. For the piston failure, I'm sure most of the debris was blown out the exhuast but there is more than likely contamination of the crankcase and it needs to be cleaned and inspected.