Does anyone have a Merc inline 6 can you tell me what prop you have and speed?<br /><br />I have a 17 Checkmate and I am thinking 21-23 prop. Also, do they run best at 5800rpm like the manual says? I have to set my tach yet and am trying a 21. Tach is not right now and I am getting a test tach to dial it in.
