[G.M.]

The problem is with this new 10% ethanol fuel it starts to boil in the fuel pump in the 130 to 135 range. On a warm day after running awhile every thing in the area at the rear of a 39 deluxe engine gets over 135 degrees. It also boils over in the carb mostly after shut down. This can be corrected with a 1/2" vented insulator under the carb. The pump boiling is more difficult to over come. It looks like I may have finally have a sure solution but it requires installing a return line which a lot of people won't want to do. I never had any problems either until this stuff came along. We can get the old type fuel locally without ethanol but if you go on a trip who wants to search for it. I have 3/8's of tank of smelly old fuel to burn out before I can refill with new ethanol. Then I can do some tests when it's above 85 outside and get definite answers. G.M.