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Old 18 May 2009, 14:15   #11
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Nos4r2's Avatar
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,690
Originally Posted by Polwart View Post
Mike, assuming they haven't changed the colour codes at some point then you are looking at the following for Yamaha:

Yellow: +12V dc when ignition key is turned on.
Green: tacho signal
Black: ground (-ve battery).
Red: +12V contantly on (even with key off).

Hope that helps.
Prob not-it's an Evinrude

It's probably running the main charging circuit directly to the battery via the starter solenoid power 'in' if no-one's messed with it.
You need to fire the engine up on muffs with a voltmeter across the battery to check if it's charging.The voltage across the battery will rise after if's started if it's charging.
If the voltage across the battery goes above about 14.4v when you blip it then there's no regulator in the circuit.
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Old 18 May 2009, 16:29   #12
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Poly's Avatar
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 10,227
Originally Posted by Nos4r2 View Post
Prob not-it's an Evinrude
oops - I assumed it was the engines in his profile!
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