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Author Topic:   OMC Tach Harness Plug
MidcoastMike posted 09-01-2010 03:36 PM ET (US)   Profile for MidcoastMike   Send Email to MidcoastMike  
I have a 1985 OMC control box on my Evinrude 50, and I was thinking of adding a tach. Rather than spending $40 on a factory harness, I figured I could easily assemble one. I have 3-wire boat cable and terminals. Does anyone have the specs (size/make/etc) for an appropriate plug that fits into the slot on the control? Or at least a close picture of one? Thanks!
seahorse posted 09-02-2010 12:43 AM ET (US)     Profile for seahorse  Send Email to seahorse     
See your dealer. It is an Amphenol 3 pin connector and the 3 individual pins. Parts should be reasonable
Jamber posted 09-10-2010 09:02 PM ET (US)     Profile for Jamber    
I am in the same boat... I have a 1993 40hp Johnson and a loose OMC tach. I went to the dealer today to inquiry about a harness and they have a full gauge harness for $150(that they did not know if it would even work) and a tach only teleflex harness for $50. I am looking for a less expensive solution to hook up my OMC tach.
jimh posted 09-10-2010 09:08 PM ET (US)     Profile for jimh  Send Email to jimh     
Visit the fantastic website hosted by Bombardier:

http://shop.evinrude.com/

and get the part numbers for the connector body and pins. Order the part for the connector and wire it up yourself. Should cost about $8.

MidcoastMike posted 09-13-2010 05:37 PM ET (US)     Profile for MidcoastMike  Send Email to MidcoastMike     
Thanks Jim - For my motor, it looks like it is part #0511465 CONNECTOR, 3-pin receptacle
Jamber posted 09-16-2010 08:50 PM ET (US)     Profile for Jamber    
Thanks again Jim! I was able to use your wonderful link to find part numbers to take to my dealer.

I tried to get the same 3-pin CONNECTOR (Part # 0511465) as MidcoastMike and 3 of the Terminal Pins (Part# 0511469). However my dealer did not have enough of the pins. But they did have a full cable assembly (part# 0174130). It lists for $38, but they had two collecting dust and sold me one for only $23. I tested it out tonight, Plug and play, super easy! The extra cost was worth it for me not to have to figure which wires are which in the control box and build my own cable assembly.

Here is a link to an illustration i found (part numbers) for anyone with a similar issue:
http://www.boats.net/parts/search/OMC/OBAccessories/1992/ ELECTRICAL%201992/WIRING%20KIT%20-%20INSTRUMENT%20FUSE%20BLOCK/parts. html

I would like to connect the light inside the tach for those very rare night excursions. I was wondering if I could just and a jumper wire from the 12v terminal to the terminal for the light inside the tach. See my photo here:
http://farm5.static.flickr.com/4087/4997487718_3d963c992f_o.jpg
Would this work? Would I risk shorting out the gauge?
Is the power from the control box turned off with the key off?
Or would the light stay illuminated and drain my battery when not in use?


Thanks,
James

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