The plan for this engine was to convert it as inexpensive as possible using off the shelf parts. Thus the reason why it took so long. It also went way over budget because allot of trial and error went into selecting parts.
The most problematic issue was the carb. The ECHO insulator only fits the WYK series Walbro and at the time all I was able to find were the single needle types. I tried modifying a Zenoah block to fit but I didn't think there was going to be enough meet left to get a good seal. Thats when the project stalled and was put on the shelf.

About the time AV8TOR started this thread http://www.rcuniverse.com/forum/engi...ary-carbs.html I found a WYK 33 and got things back on track. The only thing left to do is install the ignition sensor and tighten things up.

The carb is a WYK 378 with a 10.5 mm barrel, a HS needle on the side and a low speed under the cap on the bottom/top. I also have a 12.2 mm carb to try if this does not work out.
The idea was to try to get the best mid range with the largest prop I can get away with. A little prop spinning real fast isn't what I'm after.