Got this great Enya .06-II Series #1 from Ebay -- So I thought?

Well, I was the winning bid on this nice-looking Enya .06-II Series #1 (FreeFlight/U-control) engine.
It had no box, instructions, just the engine.
Seller said it looked like little use, crank turn freely and in the photo looked clean (maybe the seller cleaned it up?).

Well, here is the photo of the engine:



Well, when I got it, I started to look it over carefully.
I noticed that the crank felt rough when I turned it and there seemed to be a lot of play on the crank in the crankcase?

See the photo below:



I also noticed there was no thrust washer between the crank case and the prop drive washer?
So, I decided to take the engine apart and see what is going on?

The prop drive washer came off easily the front of the engine and what I found was:
No thrust washer which caused the prop drive washer to wear down from the front the crankcase.





The wear on the prop drive washer is 0.6mm (see the photos below)
Overall length of the prop drive washer is 6.13mm
Front face of prop drive washer to wear area is 5.54mm
(6.13mm - 5.54mm = 0.59mm)




I then decided to see what the back plate looked like.
WOW! I've never seen a back plate that gouged out?



So, I measured the depth of the gouge in the back plate to see if it was te same as the prop drive washer?

Here is what I got:



It came to almost the same as the prop drive washer. (0.62mm)

Luck would have it that the end of the crank shaft and the connecting rod was not damaged.


I tore the entire engine down and checked everything over for damage.
Everything was o.k. but the 4-part piston was stuck and not free to turn so that was disassembled and cleaned before putting it back together.

Luck would have it that I had spare parts to replace the prop drive washer



And a replacement back plate --- on hand


Last thing to do is make my own thrust washer.
I tried to order (get) them from Ken Enya but he has none available.

I make my thrust washer from 0.6mm (.025) copper sheet that I have.
I have a punch set (English and metric) to make my thrust washer with.





So, the engine was not as much of a deal as it 1st was.
Prop drive washer for $3.75
Back plate for $4.50
Gaskets -- carb ($1.95) and back plate ($1.95)
Handmade thrust washer (copper) couple of pennies?
And that big cost ----- LABOR (love of rebuilding a nice engine like this?)

The engine now looks like the photos at the top without the excessive play on the crankshaft.