Outdrives

[kevdawg]

I have a Mercruiser 7.4 ltr with Bravo 1. Is there any benefit to go to a Bravo 3 dual prop to gain more top end?<br /><br />Thanks Kevdawg

 

[Don S]

Re: Outdrives

I've had the privilege (if you want to call it that) to drive 2 identical boats. Both 28' Bayliners with MPI 7.4 engines. One had a B2 one a B3. Both ran the same top speed, both had the same time getting on step. The only thing that changed is the better low speed steering.<br />A customer upgraded from a B2 to a B3 and reported no difference in speed or planning time.<br />Even the Mercruiser reps will tell you that there is no gain going to a B3 until you get to about 50 mph.

 

[HT32BSX115]

Re: Outdrives

I have heard that there is or was a severe corrosion issue with the Bravo3's. (Galvanic)<br /><br />Was that early B3's and the newer ones are ok or was it an "Urban Legend or people that refused to replace the zincs regularly?

 

[Mischief Managed]

Re: Outdrives

Bravo 1 has less drag than a Bravo 3 and should give you higher top speed. Bravo 3 typically gives better holeshot than a Bravo 1 (not Bravo 2, which has a much bigger prop than a Bravo 1). <br /><br />I have a Bravo 3 and it seems to require more attention than other drives to prevent corrosion, but it's perfectly fine if you keep an eye on it.

 

[TilliamWe]

Re: Outdrives

kev you will almost certainly NOT gain any top speed with a B3. And you also lose the ability to try a variety of props. There are dozens of props for your B1, there are only Mercruiser props for B3 and the sets are no cheaper that $850 new.<br />Corrosion is not an Urban Legend on B3's. You have to keep you eye on them and make sure your Mercathode system is working properly. But they will corrode quite a bit before they are "junk". Right Dave? You've got pics of my drive somewhere, and it's still not leaking gear oil!

 

[kevdawg]

Re: Outdrives

thank's to all