Brand New DF30A won't go over 3000 RPM

[trizzle]

Nope, got nothing else to add here ....

Darn, well thanks anyway. Nearest dealer is 2 1/2 hours away. Going to take it to a local mechanic. Hopefully they'll be able to figure it out.

[tsturm]

See my post above. In R the prop cavitates in F prop bites & too much bite & or too much weight

[trizzle]

Did you just call me fat? What prop would you suggest at 4700 ft?

[trizzle]

I made an ASSumption. Prop is 10 1/2x12.

[tsturm]

Go down 2" in pitch & try it? & nope to assume makes an ass of U & me you only made the first part
Good puck on your project might need more motor?

[davemg]

as tsturm says, I would try a prop with less pitch. Sounds like 2 inches might not be enough

[trizzle]

Maybe it is weight after all. I put it on muffs and gave it a quick rev (don't need criticism it's over) and it went up to 6000 in forward gear. I weigh about 220. I don't think the back is overly heavy other than myself. I'm going to regelcoat the boat this winter. As of right now the bottom is definitely chaulky. Here is the height of the motor. What prop size should I go? I know nothing.
95303213-B137-4D71-99A8-F55473376CD3.jpeg

[tsturm]

Drill a hole in the floor near the transom (Somewhere where the hull is foam cored) & check for water soaked foam. Whalers are famous for putting on weight as they get older If no water in the foam fill the hole with thickened epoxy & look elsewhere.

[2014DF25ARS]

I have a 9” pitch aluminum prop for a 25-30HP motor which you’re welcome to borrow for the cost of shipping. I live in the US - North Alabama. The 25 is delivered with an 11 pitch prop I believe, and the 30 is delivered with a 12. I never use the 9; I got it as a “stump puller”, too cheap to pass up. PM me if interested.

[trizzle]

I have a 9” pitch aluminum prop for a 25-30HP motor which you’re welcome to borrow for the cost of shipping. I live in the US - North Alabama. The 25 is delivered with an 11 pitch prop I believe, and the 30 is delivered with a 12. I never use the 9; I got it as a “stump puller”, too cheap to pass up. PM me if interested.

I just saw that's post. That is very kind of you to offer. I'll let you know. I moved the gas under the front bench and raised the motor to the 3rd hole. Put my passenger on the front bench. No issue getting on plane at all. Max I hit was 28 mph at 5400 or 5500 rpm. I know 6300 is the max rpm but this was a huge win! I ordered a 10.5 x 11 cause it was only $25. I'll see what that one does and let y'all know.

[timf1981]

What was the cause fir the 3000 rpm max? I have similar issue