I recently bought an Avenger with a 78 115hp. The motor is not original to the boat and the tach was never hooked up. I pulled the cowling off of the motor to hook the tach up when I saw a sticker that said to only use a Quicksilver tach. I really like the one in the boat(70's style) and if it works I'd love to use it. If it doesn't work, I have a brand new one I could put in it's place. My question is, can I get around using a tach that is not a Quicksilver. I don't want to damage anything (which I assume it will) by using the wrong one. The label does not list a P/N nor did I have any luck trying to find what one I can use. Any help is greatly appreciated. Thanks.