Honda 9.9 Four Stroke battery cable

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Feb 26, 2004
23,001
Catalina 34 224 Maple Bay, BC, Canada
Not neccessarily

Ross,

It all depends on how it's wired.


If it goes directly to the battery and there's always a place for the output from the alternator to go to, it's NOT a problem.

If it does go through the switch, and the alternator has nowhere to send its output, it could fry the diodes.

Lots has to do with answers to the earlier questions, though.

This is true for outboards as well as the inboard engines with alternators. So many people have their alternators still wired through the switch. Newer electrical system design suggests running the alternator output AWAY from the switch and directly to the house bank, with whatever method is used (switches, combiners, echo chargers, etc.) to provide charging to the reserve bank.

It all depends on how it's wired.

(Since we've discussed this many times before in threads about electrical system designs, one could do a search on this exact phrase and come up with many more detailed discussions of why this is a critical bit of information for anyone with an alternator on their boat.)
 

Manny

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Oct 5, 2006
983
Hunter 82? 37 Cutter Wherever the wind takes me
quick update

I just picked up my new outboard this evening and wow, the extra long shaft is long!!!! Looks like I will need to reposition my mount. Anyway I had measured the cables (harness) and it is 7.5 ft long. I don't know the gauge of the wire (I couldn't find my measurement card) but the dealer and I both had the same guess of 6. I haven't had a chance to look through the manual yet but I have to go with the assumption that the alternator would be damaged without the battery connection. The reason I am concerned is that it also has a pull start so if someone accidentally tried to start it and the battery switch was off I'd be in for an expensive repair.

Manny
 
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