I recently bought a used BME 110 from a member on RCU, I finally flew it this week and noted that the left cylinder is running way hotter than the right. The right is about 205-215 degrees and the left is about 280. I have the cowl baffled and opened the intake holes about 1/2 inch on the cowl. About 1/2 of the bottom of the cowl is cut-out.

This morning I went out again to try some stuff again. I turned the high-end needle out 2 turns so the engine is running rich. The left cylinder is still about 270 degrees and the right was about 195 degrees after 8 minute flight.

While I was out at the field this morning I also ran the engine up on the ground with no cowl installed and took temperature readings afterward. The right was 220 degrees and the left was 255 degrees, so even on the ground the left runs hotter.

Enclosed are pictures of cowl baffle and spark plugs after this mornings flight.