I’ve been having issues with my 787 rotax RFI. Top end was rebuilt has 152 compression on both cylinders. Oil pump was deleted and running premix 40:1. Injectors are not clogged and put new strainers, fuel pump, and regulator has great fuel pressure. Has a new impeller and jet drive. It wasn’t starting while in the water at all only until I ran it for awhile on the hose. Could there be something in the cooling system being clogged? It didn’t bog down and die until I hammered down for 10 seconds.
1999 Seadoo GTX RFI ran great for 30 minutes then bogged
- Thread starter N1GHTR1D3R0411
- Start date
Now it seems it’s fouling plugs immediately and doesn’t run at all.
I would say that your injectors May have a bad spray pattern. Have you had them professionally cleaned and tested lately?
I bought new ones and they didn’t work at all, do you think I’d have to have them programmed? I reinstalled the old ones because they seemed to have an okay spray pattern just from cranking.
No, they don’t require any programming
I wasn’t too sure, so the new ones were bad out of the box. Is it a possibility the crank seals could be bad too?
I would doubt the new ones were bad out of the box, I had only mentioned the injectors because I’ve had issues before with fouling plugs and the injector cleaning resolved it.
You could try running a fuel pressure gauge while your riding and see what your fuel pressure does when you hammer down on it
What’s the best way to attach a gauge while riding it?
You would need to get the proper fittings maybe from a parts machine or maybe they are available at OSD marine, but unhook the fitting from the fuel rail and hook a brass T fitting there with a hose going up to a fuel pressure gauge that you can see while riding
DaddyLoafin
Active Member
they will, but only for a limited time lol
You got that right
DaddyLoafin
Active Member
lol i learned that one the hard wayYou got that right
Yeah I’m going to hook back up the oil pump. I ended up buying an engine from SBT because the crank seals are bad and the rotary valve was shot. Now I’m trying to source an alignment tool to rent so I don’t have to spend $400 on a tool to use once.
DaddyLoafin
Active Member
you can go the route of the home made one. not super accurate but works good enough
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