Having problems with this, it will come to a plane and run about 300yds and then smother as if it's not getting fuel, let it idle for a spell and it will do it again you can pump bubble and it will pick a little,also runs on two cyl. when it does this, have rebuilt carbs,replaced fuel lines,bubble, connector fittings, filters,replaced diaphrams in fuel pump, changed oil in the tank even though this engine has no sensor. Have run out of ideas help Thanks Ray this is a 1987 DT 75
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