Have a customer with a 2013 searay SLX 496HO CAT. B3 XR with 26 front rear props - co-worker was out and said it was 5k rpms and around 45mph max, and blowing out etc. couldnt find a ratio on the drive but was thinking upgrading to a 4/4 setup - merc prop selector comes up with no recommendations!

Talk to Brett at Bblades....he fixed my B3 issues

Or contact Hill Marine, they will send props back and forth until you get it right, or at least they did for me