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Old 19 April 2005, 11:57   #1
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Country: UK - England
Town: Hertfordshire
Boat name: Enfield Explorer
Make: Ribcraft
Length: 6m +
Engine: 2x115HP Optimax
Join Date: Apr 2003
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Yamaha 90 Cutting Out

Had the small boat out over the weekend (Ribcraft 5.85 with a Yam 90 2 stroke). As a bit of background, this boat has always seemed a little under powered / over-propped as with a decent load of divers and kit on board, we only get 4400 at WOT and approx 25 knts.

Anyway, 3 or 4 times over the weekend, the engine cut out whilst running flat out at full throttle. The cut out was instantaneous, no spluttering, as if someone had thrown a swith (so suspect electrical). Fortunately, and slightly oddly, the the engine would start back up and run completely normally as soon as the ignition switch was turned, making a diagnosis of the problem difficult.

Anyone had anything like this before?

David
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Old 19 April 2005, 12:09   #2
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Country: UK - England
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It may be worth checking the main fuse in the engine to see if it or the holder is corroding and the vibration causing a break in the circuit? We had a problem on our club's old Yam and I seem to recollect it was an in-line glass fuse/ holder and it was only held together by the rubber shroud.
Jeff
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Old 19 April 2005, 16:53   #3
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Country: UK - England
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Make: Avon
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Yep go with that. Also had trouble with kill chord switches -usually the wiring behind the switch, or the ignition switch itself.

ATB
Tim'mers.
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Old 19 April 2005, 17:35   #4
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Country: UK - England
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cut out

check stop circuit wires a chaffed wire earthing out would cause it.
Paul
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