Would these props fit my 2.5" shafts, QSM11 engines?

[SeaNile]

Trying to find a used set of props rather than drop $11,000 for new ones. You all know the story, QSM11 engines, 2.5" shafts on a 2004 SunDancer.
28x30 or 28x30.5 is the size I need. They can decrease pitch by 2" max so 28x33 is probably the largest pitch size I could take. Adding pitch is not recommended.

Found these on eBay but wanted to double check with the members here about the bore/shaft size.

https://www.ebay.com/itm/273876214574?hash=item3fc44b632e:g:vsgAAOSwWxlc9tfP&amdata=enc:AQAIAAAA4Kkw7U4MnY0NGi9a6Wim+FeGdBU4nY41oCwLi+Wcv95KjH5ZY5OcaJP7zbvhIabzM/2c66q01VDvPVJRkTAoPXATuM7jtu5T7WhboTVBliQKoOXJCPVf/IlLk75TMgRjUU99gvvmG9vNyzelpeWOhIkicN/kbMpT5DBOs0HSngDo7E4huK6PIzh1Plrpw0Ov2nzb23JSklK9j2FMQX4KU23pDiJJznu0d326LDxOCy6SQ7IwFfUu5VexJD+tk/wmO+nGEsai/zm7fsVFiJtfyOValYQo9K4mNH45sIZNRsay|tkp:Bk9SR-bY-pqhYg

 

[Woody]

No, they won't fit as is. The bore and keyway size look to be for a 2.25" shaft.

 

[techmitch]

Trying to find a used set of props rather than drop $11,000 for new ones. You all know the story, QSM11 engines, 2.5" shafts on a 2004 SunDancer.
28x30 or 28x30.5 is the size I need. They can decrease pitch by 2" max so 28x33 is probably the largest pitch size I could take. Adding pitch is not recommended.

Found these on eBay but wanted to double check with the members here about the bore/shaft size.

https://www.ebay.com/itm/273876214574?hash=item3fc44b632e:g:vsgAAOSwWxlc9tfP&amdata=enc:AQAIAAAA4Kkw7U4MnY0NGi9a6Wim+FeGdBU4nY41oCwLi+Wcv95KjH5ZY5OcaJP7zbvhIabzM/2c66q01VDvPVJRkTAoPXATuM7jtu5T7WhboTVBliQKoOXJCPVf/IlLk75TMgRjUU99gvvmG9vNyzelpeWOhIkicN/kbMpT5DBOs0HSngDo7E4huK6PIzh1Plrpw0Ov2nzb23JSklK9j2FMQX4KU23pDiJJznu0d326LDxOCy6SQ7IwFfUu5VexJD+tk/wmO+nGEsai/zm7fsVFiJtfyOValYQo9K4mNH45sIZNRsay|tkp:Bk9SR-bY-pqhYg

No, they won't fit as is. The bore and keyway size look to be for a 2.25" shaft.

I'm reading 1 3/4 - 1 13/16 - 1 1 7/8th's ID depending on angle of pic. No?

 

[Woody]

I'm reading 1 3/4 - 1 13/16 - 1 1 7/8th's ID depending on angle of pic. No?

That is the small end of the taper. There is another pic showing the large end of the prop bore at 2.20" although that doesn't indicate actual shaft size because depending on the prop hub length you could get a variety of large end measurements.

The keyway measurements would be correct for a 2.25" prop shaft but too small for a 2.5".
https://timcoindustries.com/wp-content/uploads/2015/03/propeller-shart-dimension.pdf

 

[techmitch]

That is the small end of the taper. There is another pic showing the large end of the prop bore at 2.20" although that doesn't indicate actual shaft size because depending on the prop hub length you could get a variety of large end measurements.

The keyway measurements would be correct for a 2.25" prop shaft but too small for a 2.5".
https://timcoindustries.com/wp-content/uploads/2015/03/propeller-shart-dimension.pdf

Thanks for the info./correction.

 

[SeaNile]

Thanks. That's what I was reading as well. The search continues.