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Old 05 May 2011, 17:45   #1
Country: Ireland
Town: dublin
Boat name: Charlie Fox
Make: zodiac
Length: 5m +
Engine: yamaha 100
Join Date: Sep 2010
Posts: 10
Advise on engine electrics PLEASE

Hi All,
While recently replacing battery box and battery (2007 Zodiac Pro Open 5.5) I very briefly connected positive to neg and vice verca. Now, engine (2007 Yamaha 100hp) would'nt start or trim and Yamaha guages d'ont display any info. Boat electrics fine. When I connected ignition to bilge electrics engine started but eventualy blew fuse. Can any one tell me what has gone wrong ? All fuses are ok. Any ideas on this problem would be greatly appreciated.
Regards, Finnrib.

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Old 06 May 2011, 01:41   #2
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Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 6m +
Engine: 2 x 115 Etecs/DF140a
MMSI: 235060745/235111389
Join Date: Feb 2008
Posts: 6,409
When you say "won't start" is the starter turning & engine not firing, or is the whole thing dead? If it's all dead, i'd make sure that you have checked all the fuses, is there one hidden away on the engine block somewhere?
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Old 06 May 2011, 13:08   #3
Country: UK - England
Town: Gloucestershire
Boat name: Osprey
Make: Osprey Vipermax
Length: 5m +
Engine: E-tec 300 G2
Join Date: Dec 2006
Posts: 4,008
There will probably be a blade fuse under the cover of the engine that has blown. Hopefully thats all
Chris Stevens

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Old 06 May 2011, 13:17   #4
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Country: UK - Scotland
Town: Girvan & Tayvallich
Boat name: Breawatch
Make: Ribcraft
Length: 5m +
Engine: Mercury 150 F/stroke
MMSI: ex directory!!
Join Date: Sep 2008
Posts: 5,279
Yep I would certainly carefully check your manual for all your engine fuses.
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Old 06 May 2011, 18:53   #5
Country: UK - Wales
Make: Valiant
Length: 5m +
Engine: 75 Optimax
Join Date: Jun 2010
Posts: 108
I'll be honest, I haven't had much to do with Yam's.

That said and applying Merc/Mariner logic, there should be fuses located on the engine with the sole purpose of protecting electronics when cases like this should arise. Check these carefully and depending on your boat set-up, there could be a breaker board or main fuse located nearer your battery or isolation switch.

Best of luck.
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