Sea doo 3d problem need help

[20043d]

Hi there I am new here and I have a sea doo 3d that is running rough has good spark, compression new plugs and rotary valve, it does not want to rev up just Bogs

 

[mikidymac]

What model there were 787 and 951 3D's.

 

[20043d]

787 RFI been trying to figure this out for months lol

 

[20043d]

Just took it out on the lake today and still only nuns at 1/8 throttle then bogs out. Are coils a comman problem

 

[20043d]

Pic of head off

 

[Dogger]

So it looks like you need to flush that motor with more than just water some sort of Sullivan that gets rid of all the corrosion next you're going to want to check all your cooling hoses water routes make sure it's venting properly out of the eyelets at the back engine compartment highest and make sure your oil is clear lines next you're going to want to turn your carburetor low screw all the way in and then turn it out one full out turn in your idle till you're hitting 1800 RPM relatively fast idle

 

[20043d]

So it looks like you need to flush that motor with more than just water some sort of Sullivan that gets rid of all the corrosion next you're going to want to check all your cooling hoses water routes make sure it's venting properly out of the eyelets at the back engine compartment highest and make sure your oil is clear lines next you're going to want to turn your carburetor low screw all the way in and then turn it out one full out turn in your idle till you're hitting 1800 RPM relatively fast idle

It’s a 787 rfi engine no carb

 

[20043d]

Hi there any updates for what I should do next

 

[burtshaver2021]

Not sure how much this will help but since you don’t have a lot of replies I will put my 3 cents in. I would first make sure you have a real good battery, have it checked at an auto parts store. I believe the RFI’s require a real good battery. Next I would check your voltage regulator/rectifier, I’ve heard they can cause all sorts of of weird issues. 3rd, I would check your fuel pressure, if it still isn’t running correctly having the injectors cleaned and tested. Theres a really good long thread on here about RFI, I will see if I can find it.

 

[20043d]

Thanks so much, where can I get a good fuel pressure testor

 

[burtshaver2021]

G

Post in thread 'The RFI (Rotax Fuel Injection ) Spot'

Feb 13, 2013

no, its just a fuel pressure test set up, you got all that pressure, and alot of volume also, its just a tool if you have a problem, its to eliminate a fuel problem, then move on with diagnostics --- i wouldnt want that kinda leak in the gulf of mexico where we ride ... lol

• griz400

See if this works

 

[20043d]

Will do thanks very much will
Update after testing

 

[burtshaver2021]

Thanks so much, where can I get a good fuel pressure testor

I’m not 100 percent sure, I’ve never had a need to buy or make one but I would think OSD marine would be a good place to look first.

 

[burtshaver2021]

Does it rev up to 4500 rpm? If that’s were it’s having trouble you should check the rave valves

 

[20043d]

Does it rev up to 4500 rpm? If that’s were it’s having trouble you should check the rave valve

 

[20043d]

Found the problem my long pipe from the front pipe to the water bock is collapsed internally if anybody on here can get access to one I will buy thanks so much

 

[burtshaver2021]

Nice catch, glad you found that before sinking money into it

 

[20043d]

Thanks man I was thinking the motor was shot but I recheck compression and it was 155 each side let me know if u come across a pipe for it I know there hard to find

 

[burtshaver2021]

I’m browsing marketplace all the time, where about are you? That’s different than any pipe I’ve seen on a Seadoo before.

 

[mikidymac]

You could give Westside Powersports Seadoo a try.