I have been playing around with a friends boat......
He had a 24" Chopper Prop on a 22' Progression with a 225hp Merc. The motor had no problems with that prop and would hit the rev limiter quite easily. He decided to try a 26" Chopper (It IS the next size up) Well now the damn thing no matter how hard you try or how many people you have lean over the bow...... IT WILL NOT GET ON PLANE.
Any suggestions?

Does the prop blowout and the revs take off or cant pull the rpm to get on plane?

Totally blows out.......

What can I try?

WT:
The prop needs more cup, the engine needs some above water exhaust outlets to reduce through hub volume (should also help top end #s), and I would also try a ride plate and/or a whale tale similar to what the OB drag racers run. Try this link for more info, bulletowners.com . Click on favorite links, them "Mike Ray's foils, etc."
Regards,
Steve

If the props not vented your not going to get on plane.
Is the prop vented?

Can we just drill some holes to vent the prop ourselves? (I'm not sure if it is vented or not. I will find out though.)
Will venting the prop fix it?

Chopper props are over the hub exhaust propellers. They are as vented as they can get. In other words, no you can't vent them anymore.

The chopper props, sorry to say are inconsistent in their manufacturing. Truing the propeller and adjusting the prop cup will help the planing ability. A whale tail may help too. Make sure the foil is above the waterline once on plane.

If a hydraulic jack plate is installed, drop it all the way down on hole shot and bring it up as the bow breaks over.

So will lowering the motor a bit help?
Can this prop be made to work with out a whale tail or hyd. jack plate?

I am always browsing thru the prop postings, reading the questions and answers idly, until I see Brett from bbladesprops reply, this always gets my attention fast. Brett flat out has the answers! I never found 2 Choppers out of the box that run alike either. Listen to Bret, he learned from the best. Send the 24 to Brett, maybe some cup can be added, I would rather run the prop right at the rev limiter, then in the middle of the RPM range.

Philip

Thank you for the kind words Philip.

He's right too. We always try to prop at the highest rpm we can, touching the rev limiter with the "tallest" pitch available.

We can work with either propeller. The 24 turned up a little would be the best starting point. We can also take the 26 and blueprint it so the leading edges are clean though the water. If they are not, the h2o can tumble over the leading edge causing the prop to ventilate and blow out.

Yes dropping the engine may help your ability to get on plane with the 26. The down side is that the added drag from the gear case may hurt the top end your looking for from the bigger pitch. That is why I asked if you had a hydraulic jack plate, Then we could work the 26,,you drop it for hole shot and lift it for top end.

Give us a call if you would like to discuss your set up in detail.