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RXT215 Exhaust Overheat/Reduced Power

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Loudtrend

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Hi,
First time here. I have a 2009 RXT215 that was running perfect until now. Was riding and everything was great. On flats was WOT when the exhaust overheat sensor alarmed. Shit it down immediately and had buddy tow me in. Opened up seats and looked for any trouble signs. I know they run hot but it did seem hotter than normal. So I let her cool down. We were in a remote area so I decided to try again and it started up fine and ran fine for about 10 minutes when I decided to open it up again to see if it was truly okay. Well that was a mistake I guess because this time it lost power/MPH even though the RPMs stayed high. When I saw that I let go of the throttle and it shut of on its own. The weird part this time is it did not alarm until I took the key off and put back on. Only then did it show high exhaust temp warning. I got towed rest of way and brought it home and flushedit out. It didn’t have it’s normal sound though. I know they rattle but this was a little louder than what I’m used to hearing from this machine. I inspected the impeller and pump for weeds or damage. The wear ring was pretty beat up so I replaced it. Other than that no visible damage. I also checked the supercharger which was rebuilt about 10 hours ago to see if it was loose but that felt fine. Took to the ramp and put in. Immediately I heard an on/off squealing noise followed by an abrupt stop of the engine almost as if someone stuck a 2x4 in the pump. I figured the impeller must be jamming on the new wear ring. So I took it out and sprayed silicone spray on the impeller and wear ring. I was then able to run without that problem. This time I backed it in but didn’t disconnect it from the trailer. Started it up but it didn’t sound right and also would not go past 4000 except for one second it hit 5000. But it definitely doesn’t sound right. Decided to drop it in anyway to see if I could clear it out but it sounded so bad with a weird rattling noise I decided against it and put back on the trailer. Hard to pinpoint the rattle but clearly something is wrong. So now I’m at a loss because I’m not a Sea Doo expert and I don’t trust the shops because of all the horror stories I’ve heard of throwing parts at the machines until they finally find the problem. I would appreciate any help. Thank you in advance,
TJ
 
Run compression tests on all 3, if their good then listening at idle for a rythmic knocking (rod) and if it's normal and no other odd noises _inside_ the hull then you may have blown something out of one of the mufflers. Never opened one up but I know there is some limited baffling inside and with an over heat you may have blown one loose. This can turn around and plug the outlet. If it gets a lot quieter as far as exhaust bark goes under full throttle then you may have a severe restriction in there. Pretty free exhaust on these, bark is consistent right up to redline.
 
Run compression tests on all 3, if their good then listening at idle for a rythmic knocking (rod) and if it's normal and no other odd noises _inside_ the hull then you may have blown something out of one of the mufflers. Never opened one up but I know there is some limited baffling inside and with an over heat you may have blown one loose. This can turn around and plug the outlet. If it gets a lot quieter as far as exhaust bark goes under full throttle then you may have a severe restriction in there. Pretty free exhaust on these, bark is consistent right up to redline.

Thank you, I will run the compression test tomorrow and let you know the results. I did pull the plugs right after the initial problem and all three were clean and dry. I also checked the oil for any contamination but it’s very clean.
 
I did the compression test and all three cylinders 90. Don’t know what that tells me other than I know that’s too low. All the plugs are clean and dry and it does run so I know it’s not seized. No water in the oil or coolant overflow.
 
That sounds like a cheap compression test tool that won't go above 90 if they are all reading 90. Usually All the cylinders don't lose compression at the same rate and end up all low at the exact same PSI. If it's cheap tool (harbor freight is known to have this issue) retest with a good compression tester.
 
Actually was just thinking the same thing. I did have a nice craftsman one but lent it out and never got it back. You guessed right on the harbor freight special. I will return and buy a good one. Should have known better. Thanks for the reply.
 
It could be right, if you jumped a tooth on the cam it would lower your compression evenly. I assume you held throttle wide open when you tested..
 
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