I just completed the first run of my converted Ryobi twin-ring trimmer engine. Results follow:

1) Despite someone else posting that their twin-ring Ryobi would hand start, there was no way, no how mine would flip start by hand -- either hot or cold.

2) I installed the primer bulb, but not the choke. One website I went to said that the choke was unnecessary if you use an electric starter. I found cold starts to take QUITE a bit of electric starter spin before firing, even with lots of primer pushing. I think I'll put the choke back on! Warm starts were instantaneous with my standard Sullivan starter.

Question: Does the primer bulb actually inject any fuel into the carb bore, or does it just get the carb's diapragm flow paths to and from the tank bled-in?

3) With less than 12 ounces of 32:1 lawnboy oil mix run thru it so far, I'm getting a solid 7000 RPM with a Zinger 18-6, stock Zama carb, and the stock muffler.

4) I really like the quality of the Paragon Engineering conversion components I chose. I'm a very happy camper with their quality & quick delivery!

Other pics follow in next posts...