Rob Dog
Member
Please read to end prior to replying....
I have been chasing an issue with our 96 GTX 787 for a couple of years. Here is the background.
A couple of years ago I was riding it for about 5 - 10 minutes and it all of a sudden lost power. It did not die. I idled it back to shore and that was it. I rebuilt the carbs and it still would not run.
This Spring I found a local guy that still works on old model SeaDoo's. He rebuilt the carbs again with a Mikuni OEM kit. He set the low end to 1 1/2 turns on both and zero on the others. He sent a video to me showing it running and said "good smoke" It was revving well. When I picked it up he told me that he had drained the fuel and put in premix.
We took it to the lake and ran it. It had trouble getting "out of the hole" but top end was GREAT. The next day I let the mechanic know what was going on and he backed off the low end a 1/4 turn each. Next time out was a lot better. The ski was blowing smoke but seemed pretty normal.
Now the fun starts.... he then said I could run straight ethanol free premium. So I drained the tank and filled it with straight premium.
My wife got on the ski and made a lap around the lake and then she lost power. Just like the original problem. No it will start but will not go more than 2800 RPM. When I got the ski home I started it in my shop and noticed NO smoke. I shut it down. My thought is that the engine is not getting enough oil and it is getting hot then shutting down. I am NOT sure if there is a sensor for that, but that is how it is acting.
There are a lot of posts here saying not to run pre-mix but it seems like that is the main thing that changed. I just pulled the carbs and made sure the low end adjustments are at 1 3/8 turns and it starts and revs fine now. I do not want to run it until I get some feedback.....
I am under the impression that running a little too much oil would be a lot better than running with no oil... If you are still reading THANK YOU in advance!!
I have been chasing an issue with our 96 GTX 787 for a couple of years. Here is the background.
A couple of years ago I was riding it for about 5 - 10 minutes and it all of a sudden lost power. It did not die. I idled it back to shore and that was it. I rebuilt the carbs and it still would not run.
This Spring I found a local guy that still works on old model SeaDoo's. He rebuilt the carbs again with a Mikuni OEM kit. He set the low end to 1 1/2 turns on both and zero on the others. He sent a video to me showing it running and said "good smoke" It was revving well. When I picked it up he told me that he had drained the fuel and put in premix.
We took it to the lake and ran it. It had trouble getting "out of the hole" but top end was GREAT. The next day I let the mechanic know what was going on and he backed off the low end a 1/4 turn each. Next time out was a lot better. The ski was blowing smoke but seemed pretty normal.
Now the fun starts.... he then said I could run straight ethanol free premium. So I drained the tank and filled it with straight premium.
My wife got on the ski and made a lap around the lake and then she lost power. Just like the original problem. No it will start but will not go more than 2800 RPM. When I got the ski home I started it in my shop and noticed NO smoke. I shut it down. My thought is that the engine is not getting enough oil and it is getting hot then shutting down. I am NOT sure if there is a sensor for that, but that is how it is acting.
There are a lot of posts here saying not to run pre-mix but it seems like that is the main thing that changed. I just pulled the carbs and made sure the low end adjustments are at 1 3/8 turns and it starts and revs fine now. I do not want to run it until I get some feedback.....
I am under the impression that running a little too much oil would be a lot better than running with no oil... If you are still reading THANK YOU in advance!!
