Good question. Typically, though, a spun "hub" (the rubber piece inside the prop that connects the splined piece to the blades... kind of like the clutch on a car) will allow an engine to all of a sudden OVER rev under high load. It doesn't sound like that is your issue.
This thread reminds me of when I first put my Grady in the water. It was 2020, so covid, so I was solo and didn't know what I was doing. At all. The hull truth had told me that the 228 was a really soft hull, I was gonna love it. I put it in the water, lowered the engine, but left it trimmed way back so it shoved the bow up. I had no idea that trimming the engine correctly was important. I wasn't stupid, just had no experience. Went out with it like that and with the bow pushed up it pounded like crazy. I had a sore back for at least 4 days after that. Went back to the hull truth and said "you guys said this was a soft hull, it beat me up so much that I can barely walk." They said "did you trim the engine?" and I said "did I what the what? What's that mean?" and proceeded to get educated.
hi, i also have a 232/ just put a 300 Suzuki on/ new/ old motor was 225 yamaha/ big difference in performance. a few things to check. 1. prop make sure its correct. 3 or 4 blade? 2. with motor trimmed down all the way, slowly advance throttle till she planes. Wait a few minutes. Then slowly bump trim on motor up, a little at a time. You should see RPM's slowly increase. at a certain point this will stabilize. If you tilt up to far you will hear it!!! 3. After this, you can play with trim tabs, on my vessel with the 300 the tabs r only used to adjust load/ people / shit on board to level her out. some guys use them to adjust attitude of the vessel forward/aft. 4) your bottom will definately effect speed/ hole shot etc. at least 2-3 knoys depending on how bad the bottom is. Last/ fuel/ try to run her at half tanks vs. full and see the difference. on my 232 it makes a big difference.
Okay, here are some photos of the prop. I don't see any marking for diameter.
Do you like the Suzuki platform more than the Yamaha? Also If you dont mind me asking, what did you pay for the new Suzuki engine? I've been thinking about upgrading to a 300. The Yamaha is close to 5k more than a Suzuki in my area.
So that's a Yamaha prop - which is good. But that parts only tells you that it's a 17". To see the diameter, you have to look at the other spots that were mentioned above. Although I think on these props, the locations that Seasick mentioned is correct, not the spot I mentioned.
in dec/ 2024 installed. including removal old engine/ install bothe new engine and all electronic controls/ sea trial/ and 20 hour checkup. 28K and change. I now have 90 hours on her/ no issues. I will run her next week. I keep her in the water under a shed and use her all year. I try to run her every 2 weeks during the winter season. My experience of 50+ years is USE or RUN the engine!!!!!! I run RV/marine anti-freeze through the system until freeeze weather is no issue.
I know 2 fellows with the 225's both say underpowered/ she dwells in the hole too long. Also full fuel/ gear/ passangers have a big effect.I again know that it's not an apples to apples comparison here... but I took a video on my phone last summer of myself cruising, of which I was at right around 22 mph @ 3,700 rpm and burning roughly 7.5 gph of fuel. I rarely touch the trim tabs unless the conditions require it, but usually leave the motor height at around the "2-3" range on the gauge. For going WOT though, and as mentioned before, I'm at around 43 mph and probably just under 6k rpm, but in order to do that with the transom bracket on the boat, I tilt up the motor considerably. With some experience in doing so, you'll be able to hear the rpm's adjust as well as feel the boat going faster when you've found that sweet spot. Honestly to me it just sounds like the boat is underpowered, as mentioned before I'd check and see what pitch/size of propeller you have on the boat and then go from there. That being said, here's another post about a 232 Gulfstream with a single F225 on it and per the numbers halfway down on the page, it hit 39 mph @ WOT. You can always call or email Grady White directly and they should be able to send you the performance data sheet for your boat with a single F250 on it and compare your numbers to it. That being said, if you're only getting a maximum speed of less than 30 mph @ WOT, my bet is you've either got the wrong prop on there or something else is considerably wrong.
