My turn with a old boat that has a sudden loss of ALL battery power in a 45 year old boat.

cyclops222

Petty Officer 1st Class
Joined
Mar 21, 2024
Messages
268
Oh well. :mad:

Corroded battery wire ends & compression lugs should be the cause. Will post the cure.
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,268
Just so you know, battery cables can rot out under the insulation. They tend to bulge in that area.

Also, I had a positive battery cable rot out overnight when it turned to blue/green paste. It was connected to the battery, was sitting in saltwater, and had a nick in the insulation. The water in the bilge had a ground path to the bay.
 

cyclops222

Petty Officer 1st Class
Joined
Mar 21, 2024
Messages
268
Thanks Chris I am Starting to die from the cancers in me. Totally forgout the wicking of water thru any opening in the insulation. A very young mechanic helper taught me to wrap any spaces on lugs with Plastic electrical tape. To seal out water / condensation running down a cable and under the wire insulation ends
 

dubs283

Vice Admiral
Joined
Jul 27, 2005
Messages
5,233
Heat shrink tubing is the best addition to battery cable ends.

Manufacturing your own is easy, just need a suitable crimper for the lugs/ends.
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
15,588
A very young mechanic helper taught me to wrap any spaces on lugs with Plastic electrical tape. To seal out water / condensation running down a cable and under the wire insulation ends
Replaced both my ground cables this Spring. The resistance values where starting to creep up

Cant make a good cable for what you can buy them for. Been using these guys for a number of years now.

If you make the cables yourself, make sure you use heavy walled, adhesive lined heat shrink on the ends
 

cyclops222

Petty Officer 1st Class
Joined
Mar 21, 2024
Messages
268
HO HO HO I decided to do some very needed rewiring of the control panel Change old glass fuses.
Turns out I wired in a NO starting of the starter motor.
If you do not turn on Bilge pump #1 FIRST. Leave it on. Turn the the ignition to on. Hear the power on whistle. Turn to starter motor and RUMMMPP !! :) I am going to leave that NON CONFORMING sequence. 🤙🤙
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,268
So you must turn on the bilge pump in order to start the engine? That could be an issue when you forget and need to start the engine to get out of a dangerous situation.
 

cyclops222

Petty Officer 1st Class
Joined
Mar 21, 2024
Messages
268
The cancer is really starting to eat my brain now. I took 5 minutes to figure out why I did, what I did. Boat is now normal again.
 
Top