a strange electric problem?

[kevin48]

I have a 1986 with a 170 4 cyl I/O the outdrive works great with the switch up and down until i put it in the water, then it only goes down. Any ideas?:redface:

 

[wingless]

Re: a strange electric problem?

The circuit is failing in that condition.

Use a volt meter to find where the continuity stops.

Measure between two points in the circuit.

The only significant voltage drop, greater than 0.5V, should be at the motor.

The failed point will have the full 12V drop instead.

 

[kevin48]

Re: a strange electric problem?

Do I need to put it in the water to do this since it works fine out of the water?

 

[wingless]

Re: a strange electric problem?

The measurements will only show the source when the problem is happening, so yes, measure when in the water while it is failing.

 

[Splat]

Re: a strange electric problem?

More than likely a trim limit switch is taking on water and reading closed.

Try to jump out the limit just to see if the motor will trim out.

Bill

 

[kevin48]

Re: a strange electric problem?

I do jump the trim to get it up and that works to get it out of the water.

 

[Chris1956]

Re: a strange electric problem?

Kevin, That is strange. I am with Bill, the trim limit switch is showing open when it is wet, for some reason. You might take a look at is.

 

[kevin48]

Re: a strange electric problem?

Wow you guys are good. I did not know the trim switch was even there. I have a wire that has broke off. Thanks again to everyone

 

[Splat]

Re: a strange electric problem?

Your welcome. But really it's just basic electrical knowledge, as well as good trouble shooting, mixed with some experience.

Bill