I have a 1997 mercury 150 but it will only tach up to 4900 rpms wot. When I got it it had an old aluminum prop on it and it was a 15 x 17. I bought a new stainless prop that's 15 1/4 x 17. Still tachs up to 4900. What should it tach to on that model and what pitch prop will it take to get me...
I have a 97 mercury v150. Engine only has 300 hours and is strong and runs perfectly except for one issue. As long as I'm running on plane its perfect. But, when I cut it back to trolling speed, 1500 rpms or so, it will go along fine then all of a sudden it sputters for just a second then the...