I just purchased a 91 -115hp mery to replace my Johnson on my boat,I allso purchased a new control box,I need to replace tach ,purchased one off ebay but no wiring digram avil. back of tach has a 8 pin conctor but I only have a 5 pin<br />connector from box,tach has no oil,hot,chk eng low oil,Iwould like this all so to work,but would be ok if i could get just the tach to work,I know gray wire is correct but where to conect to tack.any color wiring digram would help.
