Old Navy

I have a Checkmate 283 Convincor (same as current 300) with a 24 degree V hull, no pad. This is a heavy boat, especially in the middle as it has a fridge, cabinets, sink etc. I can't get the thing to air out, I have to use all the positive trim it has to get the bow up even a little. I have tried a merc racing labbed 26P Bravo 1 and I gained 200 rpms, but hardly went any faster than my stock 26P Bravo. This boat has run a best of 70.5 mph gps with a stock B1 @5000 rpms. Would an extension box help? I am running a mostly stock 525sc with a bravo 1 drive. I estimate the weight at 6200 pounds (on the water, with people, fuel etc...). Any help will be appreciated.

Magic Medicine

Talk to Brett at BBlades he can lab you a 26 like he did for me. He added cup to the prop and now I can carry the bow. I think your numbers are pretty good for your current set up. I run 73-74 gps 99 Checkmate ZT280 500efi. I am very happy with my prop, I was running a consistent 69 before with a 24 bravo 1.

noyzee

so you guys are still running you 4 blade. thats what im looking for

AIR TIME

talk to brett about the rev 25 he can lab it, also measure from the prop shaft at level to the keel of the boat a deep drive will be 7 1/2'' to 6 1/2 '', if you keep it at that a rev 4 25 done by brett will do wonders. I f you can buy a imco 2'' shortie you will see more speed with a b1 if you now have a 41/2 to 5 '' shaft height. I have a small pad, added the shortie and a carb change got a total of 8 mph gps Iran out of prop could have been a lil more. but call brett for sure.