Steve-
It would help to have a few reference points, like what prop you had and how many rpm you were getting out of it, and whether you load your boat heavy, moderate, or light.
Generally a 15 inch pitch three-blade aluminum prop of about 13-1/2 inch diameter is standard for your boat and average sea-level conditions. Stainless is nice, , dings less, performs a little better, but costs about three times as much.
If you load heavy, or go up to 4000-6000 feet or so in elevation occasionally, a 13 inch pitch prop would be better to allow the engine better "leverage" to wind up more and reach a better rpm operating range.
A four-blade 15 inch prop, like the Solas, available for Hondas, would be my first choice if I had your boat. It's smoother and has a better "grip" with the extra blade, but has a slightly narrower operating range and a slightly lower maximum top end due to the extra surface area/drag.
The general rule is that adding each inch of pitch drops the maximum rpm about 200 rpm with a two-to-one gear reduction drive unit.
Sometimes a 14 inch pitch prop is suggested from all the data analysis, but they' re hard to find, and re-pitching a 13 or 15 can be expensive.
Additionally, there are a lot of other factors, like changing the diameter, rake, cup, etc. on a prop that can affect performance.
Again, it would help to know what the numbers were with whatever prop you had been using.
Joe. :teeth :thup
