3 used Fox engines.  A .15, a 40th anniversary .35, and a .36.  What you see is what you get.  $40 shipped to the lower 48.

What you're calling a 40 probably isn't. I only remember that engine being available as a .29 or a .36. I had one of the .36's long ago. It was noticeably more powerful than the .35 stunt.

BB

    Yeah, I think it's a slant plug .29 or .36 also. Only way I could tell is to take the head off and measure the bore. Sceptre Flite web site has the specs for those engines. The .40 Stunt has a muich different case, especially on the bypass side.

  Type at you later,
   Dan McEntee

OK guys.  We'll call it a .36 then.

Well........
The way I determine if the motor in question is a 29 or 36 is to look on the top of the mounting lug.
The 29 is stamped '29', the 36 has no stamping.
Good luck & "Tight Lines!"
Wes

   That's too easy! You don't need tools or anything to do that!!   I had forgotten about that detail. I'm pretty sure I have examples of each.

  Type at you later,
   Dan McEntee

Does that mean they were already his, or just that they are his now?