pitch

[Mercury]

Does any one on here know about Yamaha prop numbers ? Is 11 1/8 x 13- G
a 13 inch pitch and will it fit a Merc 50 hp. 2 stroke circa 1985. cheers..

[Nos4r2]

That's 11&1/8" diameter and 13" pitch. Don't know about the splines, but it's a bigger diameter than the Merc prop you'd have on a 1985 50hp as standard. Standard on yours is somewhere between 10&1/2" diameter and 10&1/8" diameter.


Get a Merc prop. The diameter changes will mess you about as it's not a direct pitch for pitch swap with a Yam prop.

If thats a good 50hp on an SR4, you can swing a 14" pitch merc prop if you're solo.

[Pikey Dave]

Originally Posted by Nos4r2

The diameter changes will mess you about as it's not a direct pitch for pitch swap with a Yam prop.

'appen it's an "emergency situation"

[Mercury]

Some great info there, learning all the time. Thanks lads..