Prop for V20 cuddy with 225 OMC ob? - Page 2

macojoe · #11 10-08-2006, 09:41 AM

for $340 bucks it better sleep with me to!! :o

Welcome to the board!!

Airslot · #12 10-08-2006, 10:13 AM

Well MJ, I guess it could sleep with ya. The hub should already be lubed, but watch for the sharp edges. :D

Airslot

Skools Out · #13 10-08-2006, 01:20 PM

i checked my old 225 off my boat it was a 14.5 x 19 cupped stainless Merc prop. and Boaters had a 15 x 17 Mich. stainless cupped. I would like to try a 21 myself. I'm going to find one on ebay and test a 21 when the boat is afloat.

#14 10-09-2006, 02:00 AM

Quote:

Originally Posted by macojoe

for $340 bucks it better sleep with me to!! *:o

Welcome to the board!!

;D Well how about it lift's your stern so high there is no longer a running wake just a frothy atomizied disturbance behind your transom........maybe a little chine walk and at 40 its as smooth as silk on a 3 foot chop.

Ummm better than your current sex life .... you be the judge....... ;)

Perfidiajoe · #15 10-10-2006, 08:18 PM

I have a '77 cuddy w/ a '95 225 Merc. EFI, & I have a couple of props. I have a 17" x15 1/2" stock Merc Alum. Prop, which I can turn at 5700 to 5800, & get about 46 to 47 mph, I have two Mirage SS Props Which I got on E-Bay which are 19" x 15 1/4", One I run as is, & it turns About 5300 to 5350, at 50 to 51 mph. The other I had redone, they took 2" of pitch out of it, & added a lot of cup, that one runs about 5500 to 5600, at 47.5 to 48.5 mph. Of course a lot depends on the day, wind and current, & especially load. All speeds GPS. The 19" unworked prop gets best cruse milage, good for off shore fishing, no hole shot needed. The reworked Mirage best all around performance. SS definately better than Alum. look around on E-Bay for a deal. I hope these numbers help you some. Good Luck, Joe

76GMC1500 · #16 10-10-2006, 11:26 PM

Quote:

Originally Posted by Airslot

THis is intresting. *Looks to me like once you get to 150 hp that the advantage of more power falls of very quickly on these hulls. *If the gear ratio's are the same and you can't turn more prop, why bother?

Airslot

The bigger motors have lower gear ratios and spin the shorter pitch prop faster. You still get more speed for a given engine rpm even though the pitch of the props are the same.

If the gear ratio of the 225 and 150's are the same and the 150 guys are running a 17, then I would run a 19. If you have a lower gear ratio than the 150's, I would stick with a 17.

Skools Out · #17 10-11-2006, 01:27 AM

omc all V6's have same ratio
and
all V4's have same ratio

#18 10-16-2006, 10:05 PM

Thanks for the input. I traded the 15x17 for a 19" pitch even up to start. I will post the results when I get it in the water.

reelapeelin · #19 10-17-2006, 08:31 AM

OK...it's been about 10 1/2 hours since you said you'd post results of new prop...so what's the hold-up??.... ;D ;D ...

#20 10-17-2006, 01:42 PM

is ss realy that much better than aluminium? why? i know it will flex less but, that is why i want to remove my ss and put on aluminium. so when, not if, i hit something i tear up the prop, not the unit. i have seen a few outboards on ebay that needed new cranks due to this very thing. do y'all think if they were spinning aluminium props it would have saved the crank?