What size prop?
 

I am still working on the ignition of Mercury 150 hp BlackMax. So I havnt tested this prop yet. I noticed that there is a 15 1/4 x 15p prop on it. I was wondering what you guys run? My 17' Chris Craft ran a 17p prop with 120hp I/O. It just seems like the 150 Merc should have a 17 or 19 pitch prop? Any thoughts?

Re: What size prop?
 

most guys here w/ a 150, myself included, turn a 17", which collectively should give you best all around performance

Re: What size prop?
 

I just found Mercurys prop selector. They said 16-18. So 17 seems to be right.

Thnx

Re: What size prop?
 

I carry a lot of weight, persons and fish, I commercial most of the time. I went from a I/O to a 175 Yamaha, to a now 175 Evinrude

I have had 19, 17, and 15 pitch and for me the best prop is a 15 1/4 X 15

Lots of torque and up on plane fast!! a little slower on top, but who can run at top speed all the time?

Re: What size prop?
 

When I first got my boat it came w/ a 15 1/4 x 15 and it works well. I wanted a spare so I went w/the 17" and found it, for me, to give a little more top end and was still very good outta da hole. I don't carry alot of gear or passengers[not often]. Mainly, my cruise speed stayed about the same, but I knocked off about 200 rpms and the motor is not laboring at all.[ Johnson 150 Ocean Runner]

Re: What size prop?
 

Thanks for the replys. I guess I'll try the 15p prop out and see how it goes.

Re: What size prop?
 

I CAN

Re: What size prop?
 

Then you need a bigger motor!! :D

Re: What size prop?
 

Your so full of it!!

No one goes full out all the time, and when these boats get it the slop they are best slow and steady!

Re: What size prop?
 

my "81 has a 21 pitch on a 200, i don't know how it will run since i haven't had it in the water yet, but that prop looks like it has been on there for a while. The 15 sounds a little steep, i'd try a 17. Just prop it out so the engine will turn the high end of the manufactures recomended rpm range with a light load, trimmed out. Hook a shop tach up to check your tach before you start changing wheels, its suprising how many tachs are off.

Re: What size prop?
 

No need to get yer panties ina twist, MJ...only when you're young, stoopid and daddy's still payin' all the bills do you run WOT all the time... ::) ...

Re: What size prop?
 

I have a 15 1/4 X 19 low grade stainless. Did fine, up to 42 mph top end.

I might get a 15 or 16 to go on the lake and drag the kid on the wake board.

Re: What size prop?
 

i ran a 15 X 17 stainless cupped with the 225 Johnson.

I run most of my boats WOT 90% the time till the spot i want to fish. but i like speed ;D I'd like to have a go fast boat too so i could get the N4S out of my system. I'd like a boat that would run around 120 to 130 MPH

Re: What size prop?
 

funny i asked the same question before and was told to turn a 15 17 inch prop and it is a excellant size for the150 merc
try it you will like it i used to turn a 13 1/4 x 19 s.s. and would suck air alot and the top speed was about 28 mph now i get top speed about 32 mphand no cavition

Re: What size prop?
 

Step, sounds like something not just right...V20 w/ a 150 oughtta be gettin hi-30s / low-40s w/ that prop
??? ...

Re: What size prop?
 

when i go out there is a lot of weight my two boys and me is about 500 lbs plus the tacle the bait the fuel and the bottom has the be sanded and painted

Re: What size prop?
 

it tacks out about 5500 rpms and is perfect