hot wiring harness, no start. 3l merc

oops!

Supreme Mariner
Joined
Oct 18, 2007
Messages
12,932
hi all.

im selling my little bayliner.

lake tested it the other day, it ran perfectly.

dropped it in the water this morning. started great...i reved it up....and dropped it to an idle. went to untie the ropes. and it died.

i tryed to restart it. and it caught only once in a 10 second crank, and did not start.

i checked the carb, (just rebuilt) it was looking good, lots of squirt.

i cranked it again for 15 seconds and i could swear i saw light smoke coming from the harness area. the harness was hot. really hot.
i have unwrapped it and see no burnt or bare wires.

it is a breaker point ignition, and the points and condenser were replaced about 15 hours ago.

as im trying to sell this boat im glad it broke down on me in stead of on a lake test :eek::)

but now im searching for answers....any guesses?
 

oops!

Supreme Mariner
Joined
Oct 18, 2007
Messages
12,932
Re: hot wiring harness, no start. 3l merc

bump
 

oops!

Supreme Mariner
Joined
Oct 18, 2007
Messages
12,932
Re: hot wiring harness, no start. 3l merc

bump
 

timfives

Petty Officer 1st Class
Joined
Jul 30, 2009
Messages
382
Re: hot wiring harness, no start. 3l merc

i had a similar issue with my 3.0 the main wire from the battery to the starter got so hot it started to melt.

It had a corroded connection at the starter, i replaced all the batter wires, cleaned the terminals, and the heat problem went away.

Basically somewhere in your boat you have a high resistance connection causing the heat. Check and clean your connection points for the harness.

T
 

oops!

Supreme Mariner
Joined
Oct 18, 2007
Messages
12,932
Re: hot wiring harness, no start. 3l merc

thanks tim.....i just painted the engine 5 hours ago. i thought it was fine.....but i guess not
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,259
Re: hot wiring harness, no start. 3l merc

Ayuh,... Resistence causes Heat in wiring,...

I'd start with recheckin' the points for the startin' issue...

Wish I had more ideas, but that's it for now... Good luck oops...
 
Top