Not sure this is the case so far none of the tree service saws have had any starting issues not related to fuel. The heat hasn’t given them any issues on the mtronic saws, John has 2 400’s a bunch of 362’s, 500i and only 201 tcm’s for top handles now. They have ran and started well from -20 in winter to 100 above over last 15 years or so. He’s had ms-362’cm saws since they came out.