I am not sure if i should post this here. if not i would be happy to move to another forum. 1990 Johnson GT 100 I have an old boat that i bought used. The tach. was hard wired instead of using a wiring harness to the OMC plug. Should i get another plug to put in the control box and run a harness, or will it be ok hard wired? If i need to replace the plug where could i get one? Thanks for advice.