So, I'm running a 2008 Tohatsu 25 2 Stroke with Merc Sea Pro badging... A fishing buddy with a Suzuki 25 3 cyl on a John Boat is tail-grabbing my Classic... :shock: We can't have that, CAN WE??? :twisted: After some research, I've found that making the 25 a 30 can be as easy as removing the restrictor between the carb and motor. I've also read that there is a timing adjustment necessary in some cases. Adjusting the timing is beyond my comfort zone, as a hack-mechanic. What I DO know, is that after removing the restrictor, my engine idled a good bit higher, so SOMETHING happened. I'll run it in the morning, and see if there is any gain on my previous 34 mph top end. Here's the question, to entertain me while I wait to run the motor and see for myself... Can I expect "real" better performance, and is this motor now a 30HP?? If I could touch 36mph, I'd be safely out of my buddy's reach...Unless he gets a 40... :lol: If you've been down this road, please advise.