Hi Jim,
I believe the Fox .59s had the same timing. I do have a suggestion or two, however. First, lose the exhaust baffle and install a good muffler. There are several sources, but Ithink MAACs has one of the best. Big and ugly, but fairly light.

Next, try to find a KAVAN carb that will fit the Fox intake boss. The Fox .59 carbs weren't the most advanced. OF course, if you can settle for no less than about ½-max power, the Fox carb will be OK; they just don't idle down and recover real well.

One other item is to build a solid nose section. The Fox .35 is often accused of being a "shaker", but this is mostly by folks who haven't tried the Fox .59.

Dear Jim,

The threaded pivot point is far too small for securely attaching a muffler.  Semco made a muffler adapter for the Fox .59.  The Fox 59 stack is rectangular, so it wouldn't be too hard to even hand file an aluminum adapter and use a commercial muffler attached by a steel hose clamp.

The 59 RC engines used a ringed aluminum piston and were timed the same as the CL versions.  There were actually 4 different throttles, the last 2 had 3 jets.  Once set they would run flawlessly from a "tick-tick" idle up through full power.If you get the engine and want to hear something LOUD, wait till your neighbors aren't home and fire it up with no muffler!

I ran gallons of Fox Missile Mist (25% nitro) though mine swinging a 12-6 prop.  Being a ringed engine, you don't have to use pure castor oil, but one of the fuels from Morgan or Wildcat with 2% or so castor and the balance synthetic are OK.