Allen,
Thanks for resurrecting this thread. I have a new Enya .15 III and haven't gotten around to breaking it in yet. I had found some other threads on the .15 III, but I hadn't seen reply #8 in this thread that goes into great detail on breaking-in procedures.
For what it's worth below is some information from the original owner's manual.
The owner's manual recommends a break-in prop of 9 x 3 for the .15 II. I would imagine the II and III would use the same break-in prop. It only has three sentences on the break-in procedure: "It is important to run the engine with slightly rich mixture during the break-in period. When the engine has a tendency to slow down or stop, it means that it is not yet fully broken in. It may take 2 to 4 hours running for the engine to reach its peak in power and smoothness." [So, maybe you haven't cooked it.]
The manual's recommended fuel is 0 - 30% nitro and 20% castor (no other recommendation for percentage of oil).
The CL/FF engine came with two venturis. Obviously the smaller venturi for CL. I measured the two venturis that came with my engine and one is roughly 6mm and the other roughly 7mm. You might want to check which venturi is installed on your motor.
The prop chart recommends an 8 x 5 or 8 x 6 for CL Stunt, 8 x 4 for FF, and 8.5/9 x 4 for RC.
The original muffler was the Enya M100. Mine didn't come with a muffler. I bought a different muffler on Ebay (Enya SM153). The SM153 is 2 1/2 ounces!
You can still get the Enya No. 3 glow plug on Ebay.
Again, thanks for bringing this thread back. I will probably follow the break-in procedure in reply #8. I have been using the break-in procedure at this web address:
http://adriansmodelaeroengines.com/catalog/main.php?cat_id=10 The first page or two is on breaking -in diesels. Keep paging down till you find the break-in procedure for steel/iron nitro engines.
Joe Ed Pederson
Cuba, MO