Another point. These run hot until well broken in. The only YS that I will run in on the airplane are the 140L and DZ and the 63. The 110s, 120s, and sport 140 should receive their first gallon on the bench or at least, if you do not have the bench or will to bench run the motor, fly it without cowl. Once broken in they cool off markedly.

One other point. We went out on one of these hot as heck days and even the seasoned, well broken in motors simply did not want to even out and run well. The only solution here is to really open the intake and outlet for the air. On the hottest day we flew, all motors complained, from the YS to the big DAs.

Mark