carnt see it being fuel, as you have 2 engines doing the same at 4 mins there is only one thing in common, at 4 min your fuel must be at one level in the tank, si id say tank/fuel line problem, if you stop and refuel at 3 mins what happens?
what temp is the engine running at at 3&1/2 mins?
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MBModels - Schumacher Racing - Vapextech.co.uk - MRT - Savox - SMD
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