I hope this is the right place to put this. I was called out to look at this machine after fitters had replaced quite a few parts on the fuel line (i am not a fitter).The problem was very erratic throttle speed,i located the fault to the potentiometer on the stepper motor driving the injector pump,it's held on with two 10mm bolts and a plug(three wires) using a small hand drill i managed dig out the potting material around where the wires enter the pot,and resolder the pins.all ok.Later i was told the pot is about £200!
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