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Author Topic:   Montauk 17 electrical system
claycary posted 04-22-2001 12:20 PM ET (US)   Profile for claycary   Send Email to claycary  
I just bought a '76 Montauk. When my running light connection is hooked to the battery and I start the engine, the running light fuse and sometimes the engine fuse blows. No problems when my fishfinder is hooked to the battery -- only running lights. Because they were old and corroded it was hard to tell what kind of fuse was in the panel. Looked like a 20amp, so I replaced all three fuses in the dash with new 20amp fuses. Engine also has a 20amp and I replaced that too. Problem has persisted. Only occurs when running light connector is attached. I'm thinking it's a fuse issue, but I do not have an owner's manual or wiring chart. Any advice?
triblet posted 04-22-2001 01:59 PM ET (US)     Profile for triblet  Send Email to triblet     
It's not a fuse issue. No way your running
lights should pull 20 amps. That would be
240 watts. A quick check of the West
catalog shows running lights to be 7.5
to 10W, or less than an amp each. So a
5A or maybe 10A fuse would be right.

That said, you've got a short in the running
lights somewhere. I'd check the bulb socket
areas first. Where is the running light
connection? Where the white all-round light
plugs in? If so, that simplifies things,
it's somewhere in the anchor light mast.
In a boat that old, I'd just rewire the
mast and be done with it. At least on the
later ones, the bulb socket is a standard Perko
part that West Marine carries. The plugs
are also a standard part from West. Get
a new socket, new plug, some Ancor 16 ga.
two conductor boat cable, and some ancor
glue lined heat shrink.


claycary posted 04-22-2001 11:30 PM ET (US)     Profile for claycary  Send Email to claycary     
The running lights work fine just hooked to the battery, without the engine running. Would that be the case if there was a short in one of them?
Dick posted 04-22-2001 11:50 PM ET (US)     Profile for Dick  Send Email to Dick     
Out of my expertise, but if it only happens when the engine is running could the voltage regulator be bad.
Hank posted 04-23-2001 12:13 AM ET (US)     Profile for Hank  Send Email to Hank     
Reading your post carefully you seem to say that that when you START the engine with the running lights connected you blow fuses. Does this happen during the cranking of the starter? Will it happen if you start the engine with running lights disconnected and then while idling you connect the running lights?
Incidentally, which engine are you running?
triblet posted 04-23-2001 12:22 AM ET (US)     Profile for triblet  Send Email to triblet     
If the lights work OK off the battery, and
and don't work with the engine running, I'd
be looking under the hood. Sounds like the
lights are OK to me.

As Hank suggested, it would be interesting
to know what happens if you start it with
the lights disconnected and then plug them
in. Also, again, where is this plug in the


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