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Wiring Guest switch wrong, help

Old 07-03-2006, 10:24 AM
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Default Wiring Guest switch wrong, help

Well, I am glad I undertook this project as I have now discovered my boat is not wired correctly at the switches. I have been blindly operating the boat per my dealer and manufacturers instructions and it worked, so I assumed it was correct. I have dual Guest switches. I understand my common (both) terminal is supposed to be hooked up to the engine + positive lead. My #1 and #2 battery + leads are to be hooked up to the #1 and #2 terminals on their respective switches. Lastly the #1 and #2 terminals are jumped to the #1 and #2 on the opposing switch.

My confusion lies in some of the wiring diagrams I have viewed on this site. Birdman's for instance has a "starter" lead and an "alternator" lead coming from his engines. The Perko and Guest web site also have this in some diagrams but not others. I only see a single red large guage wire coming from my engine rigging access holes. Should I have 2, one for the alternators and 1 for the starter? I have stock Yammi F225's and I am not using the alternate charger lead as far as I can tell.

Old 07-03-2006, 12:05 PM
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Default Re: Wiring Guest switch wrong, help

In your case this is one way to wire the batteries, GW does this on their 33. you don't need the secondary charge circuit. I assume that the dealer told you to run one switch in the 1 position and the other in the 2 position. this effectively gives you a seperate battery for each engine. with the abillity to run either engine of either battery or both engines off of either battery or both engines of both batteries..... If It were me I would add a seperate house bank and charge it with the secondary charge lead(s) and then put in an on/off switch that paralells the house and starting bank for emergencies .....
Old 07-03-2006, 09:38 PM
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Default Re: Wiring Guest switch wrong, help

I would do the following:

Disconnect the #1 jumper between the switches. This isolates the 2 starting batteries. Leave the #2 jumper creating a house bank consisting of 2 batteries.

Connect the secondary charging lead on your F225 to battery #2 (do on port & starboard). Connect all house loads (electronics, etc) to battery #2 (either one or both as they actually appear as 1 big battery) via another switch (described later)

When you run the boat the Battery switch will always be in Position 1 (battery 1 connected to engine for starting & charging).

Battery 2 (port & starboard) have effectively become 1 large house battery which will charge via the secondary charging lead from either engine (handy if you troll with 1 engine). In an emergency it can be connected to the engine for starting by putting the Battery Switch in Position 2 or Both.

Add an ON/OFF Battery switch that connects the house bank (consisting of 2 batteries) to the house loads. When leaving the boat all 3 switches are turned to OFF disconnecting everything. **

** Everything except your automatic bilge pump leads

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