Going to have a local machine shop make a shaft hub adapter for a Ryobi.

Is there a standard O.D. dimension for the contact face and washer that are used for 16" to 20" props?

What is the general O.D. dimension on props that size and is it necessary to have full surface contact?

What is the thickness at the hub of props this size?

Do not have anything to measure as yet just waiting for props to arrive. Yep, a newbie!!

Thanks for the assist.
mikenlapaz

I can machine you any size prop adapter you want for $15.00 + Shipping.

I machine my hubs from 6061 aluminum, the diameter of the hub where the prop bolts is 1 1/2". I knurl the prop surface and polish the hub when complete. I will also machine the hub length to fit your particular application. If you are interested in having me machine you a hub or would like to see some pics of my work, send me a PM

Scott

I professionally convert string trimmer engines, too, and sell prop shafts. I can't beat Scott's price (wish I could sell one that cheap) , but I do sell a standard prop shaft with knurled facing for $25.00 plus S&H. 5/16-24 Thread, 1 7/8" long. Being in Texas, I am a little closer though! Ha!
Regards,
Mike McGraw,President
GCBM R/C Inc.
5009 Fairdale
Pasadena, TX 77505
281-998-2529

Can you ship to the UK, Scott ?

I've converted a McCulloch 21cc but need a Prop Shaft to finish off the job. This is one truly nice little "International Engine". The Carton the Weed Trimmer came in says " Made in Italy". The Engine Flywheel is made in USA. The Carb in China.

Thanks - Bye for now - Steve
[email protected]