- Local time
- 1:52 PM
- User ID
- 360
- Joined
- Dec 31, 2015
- Messages
- 23,183
- Reaction score
- 148,152
- Location
- East Jordan, MI

Mine didn’t have anything done to it. But the first time I ran it, it scared the *s-word out of me. I put a fin on the back to get it out of the water a little bit better and slow it down some. Since then the boat and equipment got heavier and I dropped to a 14They don’t take much tweaking. 40s mod out faster than the 60s. Same block but port timing is different on the 60 in a bad way. Gear ratio on the 60 won’t allow you to raise the exhaust more than it is either.