I already posted this in the Q&A but it is not getting many hits. Since the folks here have always been so helpful in the past, I'm going to try:

I've just completed the testing of my first smoke system on an Aviation Models, (SD/TOC Extreme) 33% Yak 54 with a 3W 70cc engine. It has the wrap-around pitts style muffler with smoke fitting already attached.

I am finding that smoke is coming out ALL the time in small amounts, with a noticeable difference when I activate the Sullivan Sky Writer pump, (on 6V). Obviously, this burns up the smoke oil pretty quickly, and it also seems to occasionally cause the engine to take some oil into the cylinder, making it very difficult to start for awhile, (had to flood it, open up the throttle, flip repeatedly, ignition on, flip, repeat, etc.).

Another issue I ran into is that the pump seems to work for a little while and then stop. It will start again if I adjust the end point up and then back down to where I want it. I have it at a pretty low setting so the oil doesn't get used up too quickly. It worked fine when I had it on at about 50%, sending huge clouds of smoke out, but that was more than I needed and it lasted about 30 seconds.

Any ideas all ye 3D smoke gurus?

-Pat