Got a free Prop today, A few questions. w/ pics

[semo549]

Today a guy at work gave me a SS prop for free. It is about the same diameter as the prop I have now on my boat. What kind of performance can I expect from this new prop in comparison to my current setup.

My current setup:
1977 Sea Ray srv187
Weight of boat: not sure
Motor/outdrive: mercruiser 165hp I6/ one drive
Prop: 14.5" aluminum 3 blade, 19P, not much cup to the blades.
WOT RPM's w/ 4 adults + gear: 4050
smart tab equipped
-Boat now runs great good holeshot decent cruise and top speed. My WOT spec is 4100-4300 so I'm right in the money right now especially with me and my Lady on board. I would go try it this weekend but I'm leaving for vacation and the river I boat at is super flooded.

This new prop is a completely different design, its hub-less, and requires a different thrush washer. Also the rear of the blades are flat rather than rounded. What kind of performance should I expect? And whats with the hub-less design. Seems like it could cause some serious damage if I were to smack a log...

Thanks, Here's some pics of the new prop. as well as one of my current prop.

 

[bigcathunter]

Re: Got a free Prop today, A few questions. w/ pics

I don't think that prop is for a mercruiser, it does not look right at all.

 

[semo549]

Re: Got a free Prop today, A few questions. w/ pics

I'm pretty sure it has a 15 tooth spline.

I also forgot to add that the SS prop is 19 pitch.

 

[semo549]

Re: Got a free Prop today, A few questions. w/ pics

no suggestions from anyone?

 

[oldjeep]

Re: Got a free Prop today, A few questions. w/ pics

SS prop without a hub that can release - no way in hell I'd run that. You hit a rock and there is a great chance of saying good bye to your drive.

 

[usskydvr]

Re: Got a free Prop today, A few questions. w/ pics

Looks like one of the older Mercury Cleaver racing props. pn 48-74????
Very common ( almost standard) for racing props to be solid hub.

 

[cougar1985]

Re: Got a free Prop today, A few questions. w/ pics

you hit anything with that, your free prop will cost about 2 grand or so.put it on the wall and get a new one with the new style hubs.