Re: [OMC-Boats] what is this......

Well that would be tachometer pulse adapter. Allows the use of 2-stroke, and 4-stroke 4, and 4-stroke 6's. (The all provide different ignition pulse patterns for every turn of the crankshaft.)

If you want to use boat's original (very cool) tachometer you'll need it. Probably nothing wrong with it. Later model OMC boats used internally configurable tachometers and didn't have this external device.

Lee

-----Original Message-----
From: omc-boats-bounces@... [mailto:omc-boats-bounces@...ultimate.com] On Behalf Of jd
Sent: Friday, July 17, 2009 11:53 AM
To: Evinrude & Johnson Boats of the 1960's and 70's
Subject: Re: [OMC-Boats] what is this......

haha - sorry......with a zillion parts, i wrongfully assumed this one
would be instantly recognizable by someone out there. It was
attached to the underside of my dash. I am doing a major dash/gauge/
wiring overhaul. part number looks like 098991 ? It's a metal
shell that seems to be filled with porcelain. Had to little pins
sticking out the side. One says 6 cyl the other 8 cyl. It
was barely attached / wired. i think only one or two of the 4 wires
were actually connected to anything. has a green, white, black,
and red wire. voltage regulator? my wiring diagrams show a
voltage regulator but imply it should be back by the engine
somewhere. i can't find it. maybe this is it?

On Jul 17, 2009, at 10:20 AM, Lee Shuster wrote:

> Not to be rude, but gives us some more clues, dude!
>
> OMC Part number off the unit would help ID it. What unit is it from
> V-4 90 hp sterndrive?
>
> Why do you have it pulled/cut out? What happen to the missing
> connectors on the white and green wires?
>
> (Knowing what it was hooked up to would be helpful in determining what
> it's used for?) It would be a simple matter to locate this on an
> electrical schematic/diagram.
>
> If I had to guess -- looks like it's potted (sealed) and most likely
> is a voltage regulator for the alternator?
>
> Finding a "new version" replacement will be challenging, without OMC
> part numbers or Engine model numbers to start with.
>
> Lee
>
>
> -----Original Message-----
> From: omc-boats-bounces@...
> [mailto:omc-boats-bounces@...
> ] On Behalf Of jd
> Sent: Friday, July 17, 2009 10:57 AM
> To: Evinrude & Johnson Boats of the 1960's and 70's
> Subject: [OMC-Boats] what is this......
>
>
> what is this?
>
> what does it do?
>
> do i need it?
>
> would a new version do a better job?
>
>
>
>
> thanks!
>
>
>
>
> _______________________________________________
> OMC-Boats mailing list
> OMC-Boats@...
> http://lists.ultimate.com/mailman/listinfo/omc-boats

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Received on Friday, 17 July 2009