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Old 11-06-2012, 07:37 PM   #1
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Location: West Coast of Norway
Occupation: naval architect
Interests: surface piercing props, stepped hulls, air entrapment hulls
Boat name: none
Boat make: PetterTintorera
Engines: Yamaha 90
Cruising area: West Coast of Norway

Join Date: Sep 2005
Location: West Coast of Norway
Posts: 881
High idle speed problem Yamaha 90.

It starts fine and works well at speed, but when in neutral it revs up to ca 3000 rpm eventhough the throttlevalves are closed. Any ideas?
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Old 11-06-2012, 07:59 PM   #2
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Country: UK
Location: Devon
Occupation: Garage Proprietor
Interests: PowerBoat Racing
Boat name: If Only
Boat make: Bernico F3 OCR, Bernico Prototype Inboard, and some Ribs
Engines: Yamaha Pro V 115
Cruising area: UK, France

Join Date: Jan 2005
Location: Devon
Posts: 3,092
Timing advance arm not returning !!
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National Outboard Immersed Propeller Mono Record 103mph
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Old 12-06-2012, 08:06 AM   #3
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Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's

Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,632
Or an air leak.
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