Minnesota Classic Glastron Forum

General Category => General Discussion => Topic started by: nes-cv23 on September 01, 2018, 02:30:57 PM

Title: Vintage omc tach
Post by: nes-cv23 on September 01, 2018, 02:30:57 PM

I have this vintage omc tach in the gt-jet and I haven’t been able to get it working. Does anyone out there know what the wires are?? It has one black,one pink, one gray and one purple wire. I’m thinking I just don’t have them going to the right places. Any help would be greatfull. 

Title: Re: Vintage omc tach
Post by: Hyperacme on September 01, 2018, 07:58:36 PM

There are some on eBay that look close to yours .. Not much info , other then 1970's outboard tach.
Any serial numbers on back ?

Title: Re: Vintage omc tach
Post by: Hyperacme on September 01, 2018, 08:01:54 PM

Omc Marine Tachometer Wiring Diagram  (Scroll down)

http://imusa.us/omc-marine-tachometer-wiring-diagram.asp (http://imusa.us/omc-marine-tachometer-wiring-diagram.asp)

Title: Re: Vintage omc tach
Post by: Plugcheck on September 01, 2018, 08:16:12 PM

I had the same gauges on my beecraft, rude 115.  Seems to me mine had red/black were power, and the grey/violet connected to the engine.  Greg's posting has a schematic that shows how mine was.  Connection for engine wires is a small plug on the hand controls.  Mine worked rather intermittent, but it was on the other pontoon so a tach really wasn't needed.  Good luck, hope you get it working.