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Old 19 April 2005, 10:57   #1
Country: UK - England
Town: Hertfordshire
Boat name: Enfield Explorer
Make: Ribcraft
Length: 6m +
Engine: 2x115HP Optimax
Join Date: Apr 2003
Posts: 67
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?


rads is offline   Reply With Quote
Old 19 April 2005, 11:09   #2
Country: UK - England
Town: Chesterfield
Boat name: Sea Quell
Make: Picton Cobra
Length: 5m +
Engine: Mercury 150 4 Stroke
MMSI: 235038298
Join Date: Sep 2003
Posts: 911
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 is offline   Reply With Quote
Old 19 April 2005, 15:53   #3
Country: UK - England
Town: Nr Faversham, Kent
Boat name: C Rider
Make: Avon
Length: 5m +
Engine: Yam 80
Join Date: Jan 2005
Posts: 479
Yep go with that. Also had trouble with kill chord switches -usually the wiring behind the switch, or the ignition switch itself.

Searider - The Best 5.4 x Far
Swifty is offline   Reply With Quote
Old 19 April 2005, 16:35   #4
Country: UK - England
Town: Herne Bay
Boat name: Rotary Rescue
Make: Pacific 22
Length: 6m +
Engine: Mermaid 160
MMSI: 235021725
Join Date: Nov 2003
Posts: 328
cut out

check stop circuit wires a chaffed wire earthing out would cause it.
Paul F is offline   Reply With Quote

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