If you had a picture it would help.

300 ProMax engine have a low rev limiter compared to the 300X. Because of that, large pitch propellers can be necessary to hold the upper rpm levels below the limiter. This is fine but can also affect the holeshot. This is your exact scenario.

We started this process of drilling vent holes in the Bravo 1's at Mercury Racing when the 300 ProMax first came out. I often suggested retooling the B! series to accomodate the PVS technology. We have found larger holes to be the best and most common remedy. Believe it or not we rarely cut holes under 1". We also go as high as 1.25".

The hole location is important although not critical. You will actually drill behind a blade so as to allow the aeration to cross the hub and attack the high pressure side of the oncoming blade. If you drill directly in front of the blade face, the venting is less effective as it will tumble off the trailing edge. Be careful as to not cut into the step on the front of the hub. Also known as the labyrinth seal.

We Will do a set of Bravo 1's for $75. Let us know if you have any other questions.

If I FEDEXED the props to you and you recieved them on a Tuesday Morning and gave you a return overnight airwaybill how long would it take to drill the props and would I have them back by the weeked.
Mark

fishead,

If you're asking us, this week is booked solid. We would try but I can't guarantee it. We can guarantee to have them back to you next week though.

Thanks

Talking about sending them out on the 15th so you get them on the 16th and I can have them back on the 19th.
Mark

Shouldn't be a problem, give us a call.