Recommended Prop for 4.3L mercrusier I/O?
 

Can anyone recommend the right size prop for a 4.3L 190hp mercruiser I/O motor? It's going on a 90 V-20.

Right now I have a 21 pitch on it.

Thanks

Re: Recommended Prop for 4.3L mercrusier I/O?
 

I can never remember what prop I have, and cant even look for you cause she is in the water for the summer.

I wanna say 17. :-/

Re: Recommended Prop for 4.3L mercrusier I/O?
 

what kind of rpm will it turn with the 21 at wot?(make sure your tach is accurate)

Re: Recommended Prop for 4.3L mercrusier I/O?
 

Try this one. ;D

http://i145.photobucket.com/albums/r...r/101_0149.jpg

Re: Recommended Prop for 4.3L mercrusier I/O?
 

I hava 19' on my 165 I/O. Still a good hole shot and runs fine at speed.

Re: Recommended Prop for 4.3L mercrusier I/O?
 

Check this out, this is from a mercruiser brochure that came with my boat

http://www.wellcraftv20.com/gallery/...;id=0001_G_001

Re: Recommended Prop for 4.3L mercrusier I/O?
 

I noticed you have a 4.3 merc. I have a straght 6. Did you replace the original motor with the 4.3?

Re: Recommended Prop for 4.3L mercrusier I/O?
 

I had a 165 stright I/O when I got mine, it had a 15 1/5 by 5 and it ran fine, buty that said I needed a loy of hole shot caused I carryed a lot of weight.

Most boats here wil run a 17 pitch for good over all performance.

I have a 175 OB now and the motor came with a 19 pitch Stainless prod and it does well.

Re: Recommended Prop for 4.3L mercrusier I/O?
 

I HAVE A SS 19" X 21 PITCH ON A 4.3L MERC. IT FLYES.
VERY GOOD FUEL COMPSUPTION

LESTERUS

Re: Recommended Prop for 4.3L mercrusier I/O?
 

SORRY, I THINKS IS 14" X 21 WHAT I'M SURE IT'S STAINLESS. I'LL CHECK WHEN I GET HOME.

LESTERUS