I had a very similar problem with a Zenith on the 1835 on my first KR. I was coming back from a short cross country trip when the engine started running rough. I gave it full throttle and the roughness went away. I pulled back and it started again. I didn't have carb heat at the time. I pushed in full throttle and the roughness went away again. I flew it all the way back at full throttle. I pulled the Zenith and put on carb heat. I never ran that carb again. I definitely attributed it to icing.
If it runs with a little carb heat, give it some carb heat. N64KR Daniel R. Heath - Columbia, SC da...@kr-builder.org See you in Mt. Vernon - 2004 - KR Gathering See our KR at http://KR-Builder.org - Click on the pic See our EAA Chapter 242 at http://EAA242.org
