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geoffc

Monsoon running hot at Idle.

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geoffc

I have a 03 VLX with the 340 monsoon. It's running hot at idle. Has a new thermostat and changed the impeller 4 months ago. Just started running hot at idle the last couple of time we've been out on the water. Runs at 161 at full speed, but when at idle it starts going up slowly. I get a few warning beeps at 170, then goes into limp mode at 180. I'll shut it off, let cool for 15 minutes, then it's fine as long as I keep going fast. I guessing it's the water pump. Anyone ever have this problem.

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greg2vlx

Did you check to see if the transmission cooler is clogged? I would look there before doing anything else.

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tvano

i'd check the trans cooler for debris and if it's clear replace the impeller, again, to see if that helps.

that impeller replacement is a ton less work than the water pump and if it's not the cure then you will have a spare impeller for the toolbox.

edit: post #2 just didn't register. my bad.

Edited by tvano

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geoffc

Will do. If the trans cooler is clogged whats the fix. Just clear it or do they typically need to be replaced.

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Truekaotik

Just pop the hose off and stick your finger in there to see if there's debri on the screen. If there is alot (weeds) then pop it off down by the impeller to make sure there isn't still some down stream.. Better safe than sorry... If there's any chunks of rubber, it's your impeller :( now that will need replaced as well... Good luck.

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electricjohn

Make sure the clamps are tight on the hose before the raw water pump too. This would cause purge problems at low RPMs.

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tvano

if you have not pulled the hoses from the trans cooler you should realize that over-tightening the hose clamps can crush it!

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geoffc

Pulled the hose off and sure enough, the bottom of the trans cooler was packed with chunks of rubber from a bad impeller from 2 years ago. Cleaned it all out as well as the hose and it should be good to go. I checked the current impeller and it's in perfect condition. I never knew to check that area for debris. Y'all saved me a ton of stress. What could have been a major headache turned into a super easy quick fix. Thanks.

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Wake N Bake

Hi, I have a 350 monsoon with the same problem I have done everything you have done. New impeller, pulled the seaweed from transcooler. But I haven't replaced the thermostat. Should I try that next?

Thanks

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