RCU Forums - View Single Post - OS Max engine designations
Thread: OS Max engine designations
View Single Post
Old 10-26-2007 | 05:04 PM
  #10  
alan0899
 
Joined: Apr 2006
Posts: 2,275
Likes: 0
Received 0 Likes on 0 Posts
From: Warialda NSW, AUSTRALIA
Default RE: OS Max engine designations

ORIGINAL: MinnFlyer

FS= Four Stroke - it also means Far Superior

FSR - Ditto, but the "R" means "Ringed"

G'day Min
FS does mean Four Stroke.
But FSR does not mean Four Stroke with ring,
I have a 61FSR ABC, it is a 2 stroke, I believe it means "F" front induction, "S" Schnerle ported, "R" is Racing, as opposed to the RSR which is rear induction.
Check out the time line here, http://osengines.com/history/ostimeline01.html
alan0899 is offline  
Reply Like