Thread: 49a vs 49ab
View Single Post
Old 06-10-2013, 10:25 AM   #11
Fred A
Senior Member
 
Fred A's Avatar
 
Join Date: May 2010
Location: Encino California, near Burbank
Posts: 935
Default Re: 49a vs 49ab

Quote:
Originally Posted by Marv View Post
My 59A is 3 1/16 bore and my 59A-B is 3 3/16 bore. Marv

This can be misleading in that 3 1/16' replacement blocks marked on the housing as 59 were available after the war. I had one in a military crate in the sixties. It is often stated that the smaller bore replacements can be bored 1/8" Making replacement pistons cheap. This distinction has nothing to do with A VS AB which is a stocking thing about a small change in chamber and interchange port to starboard. The engine in not really an AB but that name has wormed its way into the popular lexicon. Good Luck: Fred A
Fred A is offline   Reply With Quote