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.