Switching drive ratio ( bravo 3 to bravo 1)
 

I am the proud owner of 2001 wellcraft excalibur 24
Recently my Bravo 3 drive was stolen. I do not know what ratio it was and I want to switch to a Bravo 1 so I tried a drive which came off of a Baja, I think it was a 1.5 but I am not certain. The holeshots were terrible and I couldn't top 55 mph on GPS like I could with the B3

My old Drive serial number is OL767674 and I have the 7.4L engine s/n OL697806 my boat is 3800 pound dry weight with a V-hull similar to the larger scarab. Can anyone tell me what ratio I need to buy and also which prop should I get to at least reach 60 and still holeshot like a 24 footer.

thanks

Guys! Let's welcome my long time friend FRED !!!!

I'm sure someone here has the answer or a part of the answer he is looking for.

Thanks for your help!

The 1.5 is the ratio you want.. You will have to try some different props. What was your max RPM with the 3 drive and what is it now? what prop are you running? give some more details and somoene here will dial you in. :drink:

I remember hitting around 4500 with the B3 and I think that engine has a rev limiter at 4680, but with the B1 I think it was around 4300... could it be a 1.65?? the prop on the B1 was a mirage 21.

Its possible you have a 1.36 ratio with speeds of 50-55 your slip would be between 13% and 21%. Also sometimes they put a bravo 3 deeper in the water so you may need to check propshaft depth.

Your drive OL767674 was a Bravo 3 2.00:1

wow! big difference! 2 vs 1.5!

What should he do to be able to use a B1? Run a 15 pitch prop?

In the Classifieds ther is a guy selling used B III's with a 2:00 gear ,,,may wanna ask him if he only sells one ?!

Also the engine ser.# you listed did come with the drive you have listed

Friend of mine had the 23' 502/B1/1.50 and ran a 23P Mirage.