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Old 11 June 2008, 11:46   #1
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Country: UK - Scotland
Town: Edinburgh
Boat name: Sula / Mingulay
Make: Ribcraft 7.8/4m avon
Length: 7m +
Engine: 300 hp outboard
Join Date: Oct 2005
Posts: 79
Yamaha 225 loss of power

Just a quick note in case anyone has the same problem. We have a yamaha 225 which has always run perfectly but then over the winter developed a problem. Basically, it would run fine up to around 3600 revs, then it would lose power gradually and drop down to about 3200.

We had a yam engineer look at it a number of times and he couldnt find the fault - v frustrating given the great weather up here. Eventually he found it - we inherited the engine with a fuel flow sensor attached and it turns out on inspection that it was dry. We removed it and engine now happily runs at 5200 revs.

Probably pretty rare, but thought i would post it just in case anyone has the same quandary.
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Old 12 June 2008, 10:59   #2
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Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
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What do you mean dry? Plugged, maybe?

The sensors I've seen are an inline tube with a small paddlewheel inside; if it was dry, it would mean that no fuel could be getting to the motor.

jky
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