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Old 03 July 2011, 13:59   #1
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9.9 Yamaha

I have a Yamaha 9.9 (15hp), and I've been noticing that the amount of water exiting from the outboard has reduced, its not coming out with pressure. the impeller has been replaced recently but the problem still persisted.

what could be the fault?
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Old 03 July 2011, 14:35   #2
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It's possible you have a blockage up there. Try running a hose up it the other way. I've done it a few times in the past and it's sorted the issue
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Old 03 July 2011, 17:15   #3
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Thermostat....

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Old 04 July 2011, 01:03   #4
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Quote:
Originally Posted by benc View Post
It's possible you have a blockage up there. Try running a hose up it the other way. I've done it a few times in the past and it's sorted the issue
what do you mean? i put a hose pipe from near the propeller? (the vents where it sucks the water) and switch the motor on or

thanks
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Old 04 July 2011, 03:09   #5
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Get a tiny pipe (like off the WD40 or lighter refuelling can) and stick it in the pipe where the water exits. Suck on the pipe and although it may taste revolting you should clear the blockage if there is one

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Old 04 July 2011, 04:07   #6
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I was suggesting getting a normal hose, turning the water on, and placing it over where the water tell tail comes out.
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Old 04 July 2011, 05:24   #7
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same happen to me after a dirty river day bit of dirt blockage ... I used the inside cable of a bike cleard the blockage a treat
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Old 04 July 2011, 13:13   #8
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thanks for your fast replies

tried with the compressor and now its working ok

got another question about another outboard but will open a new thread since its a different brand + different problem
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