Would like to know if anybody has had any problems with cavitation when you initially throttle up hard. When this happens I have to almost completely back off the throttle to stop it, the boat is a 93" 502 EFI stock with EMI exhaust through the transom, can't remember what the prop is at this moment ,I'm in Ala. and the boat is in Cali. If anybody has any insights they would be greatly apprieciated.

That's why you shouldn't hammer it out of the hole. It's hard on the drive and doesn't get you up on plane any faster. I usually run mine up to about 3000 rpm and it will ease up on plane. The last time I could do a WOT holeshot was with my 201 liberator with a 350. Then we got a 272 with 7.4's and I tried it and we the props cavitated like crazy and the engines overreved. Our 336 is the same way. It gets up on plane pretty good, but there's no way you can give it full throttle. I'd just accept it as the nature of the beast and be happy that you have too much power to be able to give it full throttle from a standstill.

Do you have the drive trimmed all the way in? This will usually help but I had one boat , after I repowered it , it too would cavitate on acceleration. Dealer told me to raise the drive just a little because with all the power I had now I was sucking the water down , and drawing in air when it was trimmed ALL the way in because the leading edge of the prop was now facing up. This did help in my case. Best bet is to try different positions .
Bills right about hammering the throttle(s). Deep V's aren't good for hole shots , they like going across the top of a chop

If the boat would previously accept a full throttle launch, then you most likely have some minor damage to the propellor.

But even if it will accept full throttle, if you are running a bigblock you are signing a death warrant on the outdrive.

what everybody else just said.......



If you're running a 3 blade, try a 4 blade prop.