I never noticed any vibration or anything like that from the prop. It’s not waterlogged or anything like that either. The hull does add 10mph over conventional, it’s fairly light for its size at 4,000lbs dry weight, while my dad’s 1994 225CCR weighs 3,900lbs (350 mag, alpha 1 and stainless steel prop) and tops out at 47mph. I’ll test the tach firstly in the summer since I live in Ny. I’ll look into different props as well. I found an old listing for my boat, the guy stated that it did 66mph top speed back in 2011 and I’m fairly certain that nothing was changed since then. I’ll have to check the gear ratio to make sure it’s 1.5, my guess is that’s what it is. This boat has all the extras besides captains choice exhaust, just has thru-hull. Just based on what other owners stated and the test boats, this should be running much faster. I also remembered that at slow no wake speeds, I get a lot of wandering, maybe a 4 blade would help this as well?

Sounds like a prop or a tach problem. 350 hp and a boat with fuel and passengers added to a dry weight of 4000 lbs would likely run in the mid 50’s. With a good bottom and lots of prop testing, you might break into the low 60’s. Good luck with your boat.

My drive was labeled 1.50 but when I pulled it off someone had changed the gears and scribed 1.65 on it. A lot of fountains came with 1.65 drives that may have found its way to your boat.

The boat doesn’t seem to have had that much use out of it, I would be very surprised to hear that it wasn’t all original. It’s a bit in accessible at the moment so checking the gear ratio will have to wait, checking the tachometer will have to wait till the summer and any other diagnostics as well. I’ve seen the same setup as I have in another spectre and it ran like 68 MPH on GPS. I’ll be back here when I figure out the gear ratio.