What my prop says

[ereed969]

I am trying to figure out what prop I have. On the end of it it reads 1 /18 LP 13 12 OJ. But all the numbers are spread apart and it doesnt look like the lettering or spacing that acmes website shows. Has anyone seen this?

[chpthril]

Your prop is made by OJ, is it a stainless 3-blade?

1-1/8 = shaft dia
LP = Not sure what the mean by the "P", but the "L" should mean left hand rotation. Maybe the P is an R that didnt stamp complelelty
13 = 13" prop dia
12 = 12" pitch.

The ACME equivalent (in terms of dia and pitch) would be the 515. If you are considering an upgrade, I would recommend the 653 or possibly the 911.

[ereed969]

My bad. It says op instead of lp. But all the lettering is hard to read. I am wanting to upgrade but more than anything I want to find out if my transmission is sliping. There are some dings but I dont know if there bad enough to cause any issues

[chpthril]

Since your boat is a DD with a 1:1 gear, I would still lean towards the ACME 653 or the 911 3-blade. What elevation do you boat at? Do you ever ski or cruise above 25mph? What the dry weight of your 22i and the normal crew and load + ballast? These things would steer me toward the the 10.5" pitch 911 or the 11.5" pitch 653.

[ereed969]

I am about 4500 ft. Hardly ever go above 25 mph.Normally just have me wife and 3 kids and about 2000ibs ballast. Do you think boating in water about 7-8 ft deep would be the reason I feel like the prop is cavitating?

[chpthril]

Lack of depth will certainly hinder the height and push of the wake, but I cant honestly say whether it plays a part in cavitation. @ 4500', I would lean towards the 911, but I still think the 653 could be a good choice. I would either email ACME through thier web site or call and run this info past them and get thier input. They are truly the experts.....I just stayed at a Holiday Inn last night.....no, really, I did

The 653 and 911 are both 13" dia, so they are the same price. So its just a matter of which pitch and cup will be the best.