The engine sputtering has never happend on climb, I think because the fuel flow is at a high level for the climb (14.5 gph each). (BTW,it has never actually come close to dying, as I instantly turn on the boost pump). It only happens at cruise, and the more I evaluate it when it occurs, the more I am convinced fuel is vaporizing in the fuel line before it reaches the rear engine. The fuel lines are fairly new, so is there a way to insulate the lines without replacing them with the fire-proof lines, which cost a bundle?
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