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Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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I have a 2001 Lund Baron with a 225 optimax same year.

Customer Question

I have a 2001 Lund Baron with a 225 optimax same year. Problem I am having is the starting battery is charging but at the console I am getting low voltage never above 10 amps on my humminbird. When I hit the trim switch or even the horn I get a big discharge on the in dash gauge and voltage on the bird drops to 8 amps or less with the motor running. I had the mechanic at the marina check the charging system and he said it was OK and the starting battery is testing as charged after a long run.
Submitted: 1 year ago.
Category: Boat
Expert:  Tan replied 1 year ago.

Hello. My name is Tan.

This is going to be in your connections. You have a bad or loose connection at the battery or at the dash. Check that all you battery connections are clean and tight. Be sure all your grounds are connected at the battery. Many times a ground can get left off. Poor grounds a what causes you to loose voltage on electrical components when you hit the trim switch.

The boat accessories are on a different circuit from the engine and they get battery voltage directly from the battery. So you need to verify that all these wires are clean and tight. These wires will be smaller than the battery wires 10 gaige usually. Then there is a inline fuse holder in the red wire.

Grounds are the most neglected connections on the battery.

Do these checks and post back with findings.

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