I bought a basically abandoned 94 gtx as a project, it would run on pre mix so I decided to rebuild the carbs (including new fuel pump body), replace the spark plugs, and replace the fuel system. After doing all of the above it started easily and ran great. I had to remove the carbs again to replace the oil injection e clip that I lost and decided to not put back on just while testing to see if it would start and run. I also had to replace the rotary valve cover o ring as it had stretched. I unbolted the carbs, laid them against the side of the hull and was going to wait for an o ring to be delivered to me. I found a local jet ski shop that had an o ring out of a kit and I put it on and put it all back together. It would then not start without cracking the throttle open via the linkage and pouring a small amount of fuel in the top of the carbs. It will start like this and run, but then die when I let go of the throttle. My main concern is that it will not start without fuel being introduced through the top of the carbs, cracking the throttle is probably just the idle. I have changed nothing besides the o ring so I am at a loss as to why it will not start normally now. It has perfect 150psi compression on both cylinders. Any help would be appreciated. *A couple things that I think are insignificant: I did have to use a good amount of grease to get the rotary valve cover o ring to stay in place and I did reposition the rotary valve, but I put the front piston at tdc and lined it up within about 5 degrees of 130.
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94 GTX only starts with throttle open and fuel sprayed into carbs
- Thread starter Alexh886
- Start date
I’m thinking the new rotary valve cover o ring is leaking ( sucking air ) what kind of grease did you use? I would only use silicone grease or di electric grease in it
Motorcraft silicone di-electric. I tried the one from the local shop and I threw the one I ordered in as well. Same result.
Pain in the ass, but the only way to know for sure if that prong is leaking would be to pressure test the crankcase
IF the o-ring was leaking you would get a runaway ski where the rpm goes full throttle and you can't stop it if it was leaking and you got it running.
Did you hook the pulse line back up to the carbs?
Are you sure you got the rotary timing correct? Did you use a degree wheel?
Make sure you follow the manual as it is set at 130 degrees opening and 65 degrees closing.
Did you hook the pulse line back up to the carbs?
Are you sure you got the rotary timing correct? Did you use a degree wheel?
Make sure you follow the manual as it is set at 130 degrees opening and 65 degrees closing.
It’s a little difficult to figure out exactly where tdc is but I am pretty sure I got the rotary timing right. I lined it up with the machined in mark which seems to be 130°, verified with timing wheel. I don’t seem to be getting any pulse when cranking. Fuel is trickling out of the return line fitting when I remove the line and crank.
Update: I ended up buying a running xp which I think I will like better. I’m a decent mechanic but I’m going to be traumatized from that experience with the gtx lol
