Michael211_2000
Well-Known Member
Well I took my 2006 RXT to the lake this afternoon and though the lake is getting low I was able to walk it out past the boat launch and piers to deeper water and take off (by next weekend, it's going to be too shallow to launch even PWC's anymore, we're so DRY here!). The water at the boat launch was about knee deep, deep enough to float the hull without touching bottom but not deep enough for me to get on and start the engine so I walked it out to chest deep water about 30 yards out.
So the water was absolutely perfect today, almost no wave action at all (and no boats on the lake either, just a few other PWC's). I decided to try opening her up to full speed finally, got up past 60 mph, then to 65 mph, then 67 mph, and suddenly NO POWER! I thought the engine had completely died, but as it slowed back into the mid 30's I felt the engine was still running but very erratically and no power whatsoever. WTF?
Since it was still running and not making any bad mechanical sounds, I pointed it to the boat launch and made a B line back there (stopping far out, before the water got too shallow). The whole way back the engine was surging badly and it was taking WAY too much throttle to get it to go... it felt like either it wasn't getting enough fuel, or 1 or more cylinders was cutting out. It never died though and there were no alarms or codes on the display (so the sensors all think everything is peachy I guess). Before walking it thru the shallow water to the launch, I killed it and floated around for a few minutes in 6 feet of water then re-started it (it started right back up easily!) and tried a big power circle.. it was still missing and surging and all, something is definitely wrong here! I killed it and put it back on the trailer.
I got it back home on the trailer and before sunset I checked the Supercharger and it's fine the air impeller wheel cannot be turned by fingertips and there is no oil residue in the intake hose. I also removed the seat bridge, pulled all 3 ignition coils and all 3 spark plugs... everything looks fine, the plugs are not fouled or anything and none of the electrodes appeared "wet". I put them back in and put the coils back on and that's how she sits tonight.
What next? I started it on the trailer and it is evident to me that the engine is running rough and surging a little at idle on the trailer. I'd guess the timing chain isn't broken or else it wouldn't run at all. It didn't drop a valve, that would make noise and alot of it I'd think. So what's wrong here? I'm not sure what to check next guys. The fuel is fresh, it ran just fine for almost 30 minutes until I opened it up for that high speed run... that was the first time I've gotten it into the upper 60's and it was still accellerating before whatever it was happened. I'm mystified.
Could the timing chain tensioner have failed possibly letting the chain have slack throwing the timing off randomly? I'm thinking of pulling the valve cover in the morning and checking the chain for tension unless somebody has a better idea. The surging and missing is not consistent, it's like random and comes and goes and she starts with just a bump of the Start button but idles rough like it's missing. IDK. I'm thinking this isn't a catestophic failure but it's not obvious what it is either. At least it got me back to the launch safely! LOL!
Help?
- Michael
So the water was absolutely perfect today, almost no wave action at all (and no boats on the lake either, just a few other PWC's). I decided to try opening her up to full speed finally, got up past 60 mph, then to 65 mph, then 67 mph, and suddenly NO POWER! I thought the engine had completely died, but as it slowed back into the mid 30's I felt the engine was still running but very erratically and no power whatsoever. WTF?
Since it was still running and not making any bad mechanical sounds, I pointed it to the boat launch and made a B line back there (stopping far out, before the water got too shallow). The whole way back the engine was surging badly and it was taking WAY too much throttle to get it to go... it felt like either it wasn't getting enough fuel, or 1 or more cylinders was cutting out. It never died though and there were no alarms or codes on the display (so the sensors all think everything is peachy I guess). Before walking it thru the shallow water to the launch, I killed it and floated around for a few minutes in 6 feet of water then re-started it (it started right back up easily!) and tried a big power circle.. it was still missing and surging and all, something is definitely wrong here! I killed it and put it back on the trailer.
I got it back home on the trailer and before sunset I checked the Supercharger and it's fine the air impeller wheel cannot be turned by fingertips and there is no oil residue in the intake hose. I also removed the seat bridge, pulled all 3 ignition coils and all 3 spark plugs... everything looks fine, the plugs are not fouled or anything and none of the electrodes appeared "wet". I put them back in and put the coils back on and that's how she sits tonight.
What next? I started it on the trailer and it is evident to me that the engine is running rough and surging a little at idle on the trailer. I'd guess the timing chain isn't broken or else it wouldn't run at all. It didn't drop a valve, that would make noise and alot of it I'd think. So what's wrong here? I'm not sure what to check next guys. The fuel is fresh, it ran just fine for almost 30 minutes until I opened it up for that high speed run... that was the first time I've gotten it into the upper 60's and it was still accellerating before whatever it was happened. I'm mystified.
Could the timing chain tensioner have failed possibly letting the chain have slack throwing the timing off randomly? I'm thinking of pulling the valve cover in the morning and checking the chain for tension unless somebody has a better idea. The surging and missing is not consistent, it's like random and comes and goes and she starts with just a bump of the Start button but idles rough like it's missing. IDK. I'm thinking this isn't a catestophic failure but it's not obvious what it is either. At least it got me back to the launch safely! LOL!
Help?
- Michael
