OMC System Check Tach

[muchco]

I'm wondering if an OMC System check tach can be used on a pre 1996 motor. I understand that the system check features will not work, just wondering if the tach function would work. If so would anyone have an idea were I could find the 8 pin connector for the tach and what pins or wires would need to be hooked up.

 

[seahorse5]

Re: OMC System Check Tach

Just buy the '95 and earlier adapter kit which includes a new oil tank pickup. As long as you have a 4-wire "VRO", the System Check tach or gauge will work OK.

 

[seahorse5]

Re: OMC System Check Tach

If you just want to use the tach function of the gauge, here's the pin configuration (looking at the back-side of the gauge, holding it upright):<br /><br />1-2-3-4<br />8-7-6-5<br /><br />Purple wire goes to pin 1- 12V<br />Black wire goes to pin 2- grnd<br />Gray wire goes to pin 3 - tach<br /><br />Grounding these pins, will activate the following:<br /><br />Pin 4, turn on no oil lite<br />Pin 5, turn on low oil lite<br />Pin 7, turn on check engine lite<br />Pin 6, turn on hot lite<br /><br />Pin 8, is used to activate the warning horn, it supplies a ground to the horn circuit when any other warning circuit (pins 4 thru 7) is grounded

 

[muchco]

Re: OMC System Check Tach

Thanks for the prompt response.<br /><br />Muchco