Quote:
Originally Posted by sojoanfr
Thanks for all informations
fuel flow was good, shut off open there was a good flow out of the plastics filter
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Remove that filter! They work fine for some people but not for others. Flow tests in driveway are not reliable indicator of what happens going down the road. I suspect multiple problems are in play, and especially agree with all who accuse timing. Even if it's set right, you still need to advance the spark after starting--do you?? (someone else asked this first)
Another straw to grasp at, make sure you don't have a Model B timing gear cover.
Too rich fuel mixture will not cause overheating; just the opposite. Opening the GAV is a quicky way to cool combustion a bit, as the extra heat of vaporization required helps a bit.