I guess I can add my experience. I had tried about every prop available. My boat is an older, heavier, under powered hull ( 92 26' Four Winns Liberator w/single454 @ 275pshp). I was having difficulty getting positive trim. Three blades would blow out and I dont have the power to turn a Bravo. Everyone told me that for bow lift I needed a 3 blade and that a 4 blade would give stern lift and make my problem worse. I thought that a 4 blade would hold the water better letting me trim out further before blowout. I found a good deal on a used Rev4 here. I called Merc Racing and spoke to someone about the prop first. He indicated that my thinking was correct and that the REv4 was built exactly for my type of application. My test results were great. I picked up about 4 mph at cruise and 1 mph at top end. 1 mph doesnt sound like much except that rpm dropped from 4900 to 4400rpm. I now have room for engine improvment. I can trim the boat conciderably more as indiated on the trim gauge before blowout. The whole boat ride higher and blowout in turns is almost non-existent. I ave a rather deep X demension as well.

I've had pretty much the same results as Intolerant1. Ran a 23 Rev 4 on a fairly slow hull with deep "X" dimension and it worked great. Ran the same top end as a 25 Mirage Plus, but had much better bite out of the hole and very little slip at cruise. Mid range was awesome. It was 2 MPH faster than a stock 26" Bravo 1 and hooked up a lot better. I had it labbed and added some pitch and gained about 1-1.5 MPH at the same RPM. It ran 75 GPS at 5700 RPM with 1.5 gears. Nordicheat tried it on his 28' stepped bottom Nordic and it didn't work well at all. So, the bottom line is ya gotta test, test, test! It may be for sale if anyone is interested.

WHAT MORE CAN BE SAID /YOU ARE ALL RIGHT .TEST/TRIAL/ERROR EQUALS PROVEN RESULTS.

I had a Rev 4 23P Labed last year by Chad. It was the best thing I have could have done. I gained 3 - 4 MPH. Before Labing the best I could do the previous year was 68 now its 72 (Speedo not GPS). Well worth the effort, My 2 cents

Evil Twin

thank's for your patience your four props that you sent in will be shipped this week/thankyou !!!!!!!!!!