Re: mercury 200
Hi, Liz.<br /><br />Welcome to the board.<br /><br />That Merc sounds like an outboard to me. If so, you are on the wrong forum. You need to give more info if you want informed answers, too.<br /><br />I'm gonna move this there.<br /><br />There is no "optimum" compression. All cylinders should be over 100psi and within 10% of each other.<br /><br />Good luck.
