"mark" wrote in message
oups.com...
i/o motor 250 hp my master switch is on both or either and still
nothing at all. no ratio or lights or anything



Disconnect the batteries until you find the problem.

Now I assume you have a Mercruiser or one of the clones thereof. Somewhere
on the rear top of the engine there should be a big red circuit breaker -
looks like a big red button if I recall. Push it in, hook your batteries
back up and see what happens.

RCE

I did that with the batteries hooked up. I will diconnect the
batteries and push the red breaker then connect the batteries back up.
I'll let you know. Thanks

I disconnected the batteries and pushed in the red circuit breaker and
then reinstalled the batteries. Still nothing. What about the
alternator diods?

"mark" wrote in message
oups.com...
I disconnected the batteries and pushed in the red circuit breaker and
then reinstalled the batteries. Still nothing. What about the
alternator diods?


Don't know, but listen to JIMinFL. He knows these systems well.

The reason I suggested that you disconnect the batteries is that if
somewhere you have a short, something may get hot in time. I wouldn't leave
them connected if you are not there troubleshooting.

RCE

thanks I won't

Mark,
Hello, sounds like you have a simple problem, but you need to work
through the electrical system from the battery forward to the engine's
electrical system. Call me at my shop and I'll walk you through it.
Call me at 601-366-4999 (Mon - Fri 8am - 5pm CDT) I would be glad to
help.
Rob

thanks rob. When I can stay home from work I will call you when I'm on
the boat.
Mark

Don't worry about the alternator just yet. Do you have any test equipment?
Are all your battery connections clean and tight? If you are using wing nuts
on the battery posts, throw them away and install hex nuts instead.
"mark" wrote in message
oups.com...
I disconnected the batteries and pushed in the red circuit breaker and
then reinstalled the batteries. Still nothing. What about the
alternator diods?

I have a battery test light (green, yellow, red) yes clean and tight.
No wing nuts have hex nuts

"mark" wrote in message
ups.com...
I have a battery test light (green, yellow, red) yes clean and tight.
No wing nuts have hex nuts

1 Set battery selector switch to both
2 Clip test leads to battery. (Observe proper polarity) If lights light up
go to step 3
3 Move red lead to lug on starter solenoid that connects to the wire that
goes to the battery selector switch. If lights light up try tilt and trim.
Try to crank over engine with key (just for 1/2 second. don't let engine
start).
4 report your findings.