If it has the square venturi then it was made somewhere from '62 to late '71 and is called the 35-III. If it has the round venturi then it's a IIIB and was made until about 1980 when it was replaced by the model 5225 35-V. Strangely there never was a 35-IV.

These Enyas take a long time to run in so be patient and it'll reward you . One of them was once run for 104 hours and stripped to check for wear. The liner had worn by .0005" and the piston by the same amount. No other part of the engine had any wear what so ever.

I love Busters. Especially the Brodak version. If you luck out the wood will be very light. This has been my experience with the Brodak kit. 

There is a Brodak Buster at the hobby shop.  Does the Brodak version have the jig tabs on the ribs like the old Carl Goldberg kits?  Does it have a shaped leading edge?  Also there is an adjustable leadout shown in the picture of the kit, but this isn't listed on the kit features.  Is an adjustable leadout inclded in the kit?  What are the differences between the Carl Goldberg version and the Brodak one.  I built the Carl Goldberg version years ago.

The brodak dose not have rib tabs or shaped leading edge and no adjustabel leadouts  Real nice kit.

The Brodak has no build tabs. A straight non tapered wing. Doesn't need tabs. Unlike the Shoestring that uses tapers. I think the airfoil tapers. Which means without tabs it's a bit of challenge to get the ribs square. Like I said. Not an issue with the Buster. Broadak supplies a balsa stick laid span wise to prop up the back of the ribs. A flat surface plus the stick work to make a straight built wing. Capstrips and standard 1/2" (I think) leading edge. A square stick. Easy enough to round these off with a flat or curved sanding block. Built up trailing edge. I would web the trailing edge. You can web the main spars if you like. I usually do. My last Buster was powered by a Tower 40 that I needled to a wailing scream. Great fun. It crashed when a friend of mine and I were flying faux combat and local kids kept coming into the circle, trying to grab the streamers. We crashed the planes rather cause an injury. A chicken hopper fits and holds enough fuel for sport flying. RSM has those tanks. Well made tanks, in my experience. If you can fit enough fuel for the Enya, Busters will do the pattern with ease.

What size prop would be good for engine on the buster? I,m thinking a top flite 10/4.

  Re Mr Schafer's comments on the Enya 5224 as a stunt engine. Well it isn't a RoJett or big megabucks sort of engine , but propped correctly for the model, they are an excellent engine and they don't need much in the way of taming. If you have a choice, use a low compression head or a thick shim. Something like a TT 10.5 x6 prop and you will get an excellent 4-2-4 at somewhat higher revs than a Fox 35 and with a good bit more power. I prefer a slightly rich 2 stroke and it will do this too on something like an 11x4. Don't try racing with them, they are not really built for speed!
  They are a very cheap engine second hand and do the job better than a Fox 35 in my opinion, they certainly last longer than a Fox! Read Randy's epistle on fuel and remember they need a lot of oil. I use half and half castor/synthetic at around 28%. A good "old style" engine for stunt.

Andrew.
 

John, if you run these in a "wet" 2 stroke then you will be very pleased with the performance it will give you. In my opinion most Enya's are a excellent much over looked engine. Like Andrew I can appreciate that.

The team race comment jogged my memory some. The largest motor for TR was a .29. I had reworked an Enya .29 and used it successfully in restricted speed events and also in a team racer. Worked good. Fast enough, good economy and good hot start. Still have it! Didn't blow the crank like the .35. If you insist on running the .35 'hard', I might have and extra crank somewhere!   

I used a square intake 5224 .35 for quite a while some years ago.  I used the low compression head and the #2 venturi.  With 5% nitro and about 28% oil it ran a very good 4-2.

Jack Sheeks really fell in love with the Enya .35 in the mid '60s, designing his F3H Demon for one.

Bill

Run as a stunt engine I wouldn't worry about the crankshaft. The smoothest running one I have was "tent-pegged straight into a cement circle. Crank shaft was bent. Took it to a friends who is a machinist, put it in a small lathe, tapped it with a small hammer until it straightened out, put the engine back together, runs great, haven't touched it since. They do take a while to break in - ditto on the other advice regarding fuel etc.