What prop??
 

I have a 241 TANK, I mean Liberator. single 460. best mph to date is 52. Im currently running a viper 19 pitch, which had been repitched to 20 and, the standard cup went from 8 to 12 cup. I can get the boat to trim very well thanks to the added cup. Just wondering if this is all the boat has in it. Any suggestions on a better prop combo?

Bigbird , did you ever try a 21 Viper ? I had a 88 210 Horizon that stock came with a 350 sbc and thats what i ran . I later stroked the engine to 383 , raised the x 1 3/4 " and hung a King Cobra drive with a nose cone on it . Still used the 21 Viper and ran 68 radar . The four blade OMC Renegade works very well also .

I have not tried that. only had a hand full on props to try, hard to find something being an OMC. I have another viper core that I can play with and get repitched. I would hate to buy a new one for $400 and have it not do anything. all my buddys run merc.

You might want to mention what rpm you are running at WOT.

running about 4900-5000 R's

:bigbird:.....Sorry , couldn't resist . What is the recommended max r.p.m.'s for your engine ??

says 4400-4800. and it is accurate, I installed my autometer tach just to check, its within 50 rpm. but what I dont get is stock prop for my boat is a viper 14.5 X 19. when I put that on it revs to about 5300, that is why I had it repitched to 20 and added cup. I have a line up for a 21 mirage plus, I just need to get the OMC hub kit. I might buy that and try it.

The 21p should put you rite at 4800 . If you can find a used Viper , grab it . OMC drives seem to like OMC props' . Check e-bay . Better speed and fuel efficiency will surely be the result . Rite now your over revving and thats not good .

I took a viper core to the prop shop, getting a 14.5 X 21 built for it, going with the 12 cup also. hopefully get er out on the water soon for some testing. he said it should lower me 200 R's im hoping its perfect.

Let us know the results , we'll get that OldMansCompanion dialed in ......:evilb:

Nice!!!!

Well, I went and bought a Mercury Mirage Plus, 14.75 X 21. I have heard nothing but awesome things about this prop. Now I just wish the river would fill up so I can run it!!!

big bird how did that prop work for you i have a the same prop on my 87 241 with a bravo 1 and 454 last year i could 4200 and run about 50 sent the prop to the shop to have it cleaned and polished this year i can twist 4500 but only now get 40 so not sure wtf is up with that

have a laser II 21p on my sbc merc it turns about 4900ish boat runs 60-63 depending on fuel and pax loadI

thats a great speed on your boat, i dont know much about the 222's but i think they are alot lighter the 241s i think most 241s in stk form get low 50s from a stk 454 or 460. I need to pull my prop off and see whats going on cause unless he messed something up i should had not lost mph while gaining rpm. before it was running like 17% slip and was really scuzzy looking lots of left over marine growth on it that just would not come off, the blades felt like sandpaper so i figured that was causing some of the extra slip. had no changes asked for just a polish and balance, prop looks alot better but now getting over 30% slip. but it does come up on plane faster

Yea mine is a built 350 bored .30 over has a comp marine cam, vortec ported heads, edelbrock dual plane, and a holley 650 with an electric fuel pump, and alpha drive with 1.50ratio. Wanna say boat is making 300-330hp if i had to guess. But the laser II 21p runs around 4900ish. Runs average of like 60 on gps. Its not a very light boat but stingray seems to have a fast hull design

with the mirage prop it got the best of 53 GPS @ 4800 rpm. but the cruising speed was around 35 and 4000 rpm. sold that prop. in the mean time over the winter I rebuilt the 460, dynoed in at 438 horse at 5400 rpm. I currently run a 23 ballistic. best of 64 MPH @ 5200 rpm. still need to dial the engine in, only running 30 degrees total timing and its pulling almost 4 inches of vacuum at WOT, Im pulling the 600 holley off and bought an 800 off of an HP500 merc. hoping for 68-70 @ 5500 rpm!!!!