Evinrude 31.8ci Mod Advice

[omcstratos]

It looks like you could raise the motor up on the transom at least 2 or 3 inches, That will gain some in the top end.

[Emustard]

I moved the motor up an inch with a block of wood and it would blow out on turns and off the blocks if I full Throttled it quickly, so I removed it. This was with the stainless steel prop.

[omcstratos]

You are reaching a pretty good speed for that motor and boat. You would need to jack the motor up and try a few props with a little more cupping if you are looking for more speed. The more prop out of the water usually will raise rpm's by a few hundred, just be sure you have adequate water pressure.