2 3/4 blades on 3 blade prop.

[dinoap]

I have a 3 bladed prop the only has about 2-3/4 blades left. I just purchased the boat and a guy at work has a Stainless Michigan prop we think may work. Can anyone tell me if this prop will work and if so what adapters or washers will I need to convert.

My boat 1985 Baja Islander 180 Bowrider, Mercruiser MCM140 3.0, Mercruiser sterndrive of unknown model (serial unreadable), RPM range 4200-4600,
Current broken prop Part # 48-78120-19P

My friends prop Michigan SSO517-11C or SSO-517-IIC not sure which is correct he wrote it down and its chicken scratch. I think its off of a 3.0 OMC.
Thank you in advance,
Chris

 

[steelespike]

Re: 2 3/4 blades on 3 blade prop.

If you look these things up in the prop store section see what props fit what outdrives.Anyway I checked::
It won't fit; different diameter, different mount.A prop shop may becable to repair but get a price and see what new costs.

 

[dinoap]

Re: 2 3/4 blades on 3 blade prop.

Thank you. We tried looking up both props and have found the OEM mercruiser prop but could only find minimum info on the Michigan Part#. Also read that when switching to a Stainless prop you should change to a lower pitch. So we figured we had a chance. Thanks again.

 

[steelespike]

Re: 2 3/4 blades on 3 blade prop.

Thank you. We tried looking up both props and have found the OEM mercruiser prop but could only find minimum info on the Michigan Part#. Also read that when switching to a Stainless prop you should change to a lower pitch. So we figured we had a chance. Thanks again.

I just looked both up by application 3.0 OMC and Mercuiser.
I believe the Mich. number came up 12 3/4 X 17
The OMC I looked up was 12 3/4" diameter. The Mercs were about 14" diameter. and of course different model numbers and hubs.