Question about Yamaha Waverunner Xl 800 / Xlt 1200 Jet Ski Pwc Cover

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I have a Yamaha 1100 2008 waverunner. I am concerned about the water flow at the back. It is rather slow. I check the inlet and impeller and see no obstruction and the impeller turns with no pressure. Help

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Run on hose adapter and check engine is cooling by feeling the engine and exhaust system ! if ok then check intake water pipe is clear ! 2 or 4stroke?

Posted on Jun 09, 2014

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Starts and runs and RPMs are good but it won't go above 5 MPH. Checked intake and I have the rooster tail of water but no speed


you may have to check the pump unit for obstruction
the impellers are known to wear from abrasion from sand in the water and not operate efficiently.

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What is the thread on coupler to midshaft left or Right? this is on a yamaha waverunner 1200xl limited


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1 Answer

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1 Answer

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Nevermind those other answers, if its running on all 4the cylinders but just real sluggish and missing top speed then listen up, let's first rule out the possibility of a damaged impeller, now locate your airfilter box and remove the filter, just throw it away because last I checked dirt really doesn't settle on top of water, now locate your throttle body and remove the intake tube from it, now take out the 4 bolts that hold it on and find your flame arrestor element. I've dealt with this problem many times only to find out that the geniuses at Yamaha had installed this screen right after the butterfly which accumulates airfilter material and clogs

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1 Answer

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The water flow from my pump slows to almost nothing after 5 or 10 minutes. I change the filter and it has a great flow for a few minutes then slows to a trickle.


There are screens at the hose connections to the pump and at the inside pool outlets and inlets. Check to make sure their clear. Also be sure your using a New filter not one you have cleaned off.

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I have a 2003 yamaha 700 waverunner. It starts


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