OK here's a story. I bought a 95 xp almost 7 years ago, it was a good runner, but hesitated a bit, then gradullly got worse, as well as hard starting. So I thought I'd go through the carbs and when I did that I found the throttle plate on one of the carbs was way loose, which made the other carb come on about a 1/4 throttle after the other. So when reinstalling them I tightend the nut on that one carbs throttle shaft, and re-synced them, and it ran great for several years. Then one day I hit a wake and probably caughtover 8' of air, needless to say I came down pretty hard and right then my exaust had a louder throatier sound and the machine realy didn't want to run well, idle at best, enough to get me to the shore. I thought I may have spun the crank on impact and susainted some exhaust damage. I got it to shore and was trying to restart it, but it turned over slow like the crank was binding, only slightly poping and trying to start but only got worse. I must say that a week or 2 prior to this I had a problem with when starting it aftr it had not run for a while it was loaded up with alot of oil, so bad that I would create a heck of a smoke screen for the first several minutes, but after that it was fine. So back to my stranded craft, I had someone tow me about a 1/2 mile back to my dock, not knowing about pinching off the water inlet line. So I got back and pulled the plugs and turned over the the motor and shot the water out after putting in a freshly charged battery, and yes lots of water came out, put the plugs back in attempte to restart, it only poped and was again loaded up with water?? And ran tight. So I knew it needed more attention than just the attention. So I towed it over to the ramp again without pinching the water inlet, took it in my garage and found water in the intake when I removed the carbs. So I pulled the motor, pulled the cylinders and found one cylinder was scorded terribly, but before all of this it ran so well. I proceded to take the intake off and found the rotory valve was bent maing the engine turn over hard and eventually tight. So I found this place in California that rebuilt short blocks, and after months of stories, I basically lost my block to some halfas* shop out there, but they had a great webpage. I wrote the block off, found one from a guy in Tennisee, and picked it up, he told me it ran great?? Put it in the ski, rebuilt my carbs and I thought all was good. But I got to start it in the garage pops right off so I take it down to the river and the ski starts but wouldn't come off idle, I pulled it from the water, took it back to garage where it would start but not come off idle, just hesitated when I gave it gas. So then I learned about the gray fuel line, replaced all of that, rebuilt the carbs again, blew out the lines and fule switch, restarted and exact same thing, choked it and no difference, and shut the fule off so it would runout of fule and same thing, would not come off idle until it ran out of fuel and it never came off idle beforeit ran out of fuel. Because it was so consistant with its idle RPM no matter what it did with the fuel (rich and lean) I started to think that it was no a MPEM issue with the ignition. So thats where I am right now. Has anyone ever heard about the MPEM causing this type of problem. The motor I got has around 130 PSI of compression. I have replaced all fuel, oil and tested fuel flow to carbs and oil flow to injectors on intake. Removed exhaust and tested all for flow restrictions. Is there a limp mode on these? Any insite would be great to me at this point, thanks to all who have read this to this point.
-
This site contains eBay affiliate links for which Sea-Doo Forum may be compensated.
95 720 XP won't come off idle its astory for all
- Thread starter chantyr
- Start date
- Status
- Status
