Need help identifying prop

[virii01]

I recently purchased a boat with an aluminum prop. One of the blades has a sizable bend/chunk out of it. As such, I'd like to replace it. The problem is, I can't find any make/model information on it anywhere. I looked all around the outside and inside the hub.

The only thing I can see on it is stamped 9229 with a 3 and a 2 above the two 9s facing up. Does that mean anything? I assumed I'd be looking for something in the teens to identify size/pitch.

The boat ran fairly well when I had it out with this prop but I need to get the tach going first to really see where I'm at.

The boat is a 81 17ft Mark Twain V-Sonic w/ a 115 Johnson. Right now I'm leaning towards a Solas aluminum prop. Thanks

 

[steelespike]

Re: Need help identifying prop

You might consider having the prop repaired by a prop shop. They can also tell you the size. Did you look under the prop nut? Get the tach working and do some test runs with the repaired prop.If a change seems in order you can keep the prop for a spare.while your at it check the motor height.Raise the motor to a point just before venting becomes a problem.Usually the antivent(cavitation) plate just above the prop ends up a little above the bottom.You could gain 2 to 3 mph under ideal conditions.

 

[virii01]

Re: Need help identifying prop

Thanks for the suggestions. I plan on keeping the prop as a spare. The first order of business is definitely to get the tach going so I can see where I'm at. I think the motor might be mounted too low as well. It just looks low, even out of the water. It is on the lowest of the three mounting holes.

 

[virii01]

Re: Need help identifying prop

Ok, pulled the prop off and found the model. It was under the paint/exhaust. Michigan wheel model 011001. Google tells me this is a 14" diameter with a 13 pitch.

The motor is a '82 Johnson 115 which from what I have found has a 2:1 gear ratio.

The ventilation plate is just a little lower than the base of the hull, the motor is mounted at the lowest setting. Wasn't able to get a pick of it in the motor as I was running solo.

The prop is pretty nicked up with a few chunks out of it and a few bends.

Despite all of that, the boat performed pretty well. WOT the tach showed just under 6000, the speedo showed just under 35. I did not have my GPS so I could only go off the boat tach.

I'd like to replace the prop because of the condition, but I'm not sure I need to change diamter/pitch. Thoughts?