Hi, I'm looking for some advice. I was off road a few days ago and my engine stalled. It fired up again and idled fine but whenever I opened the throttle (in gear) it spluttered and died. I managed to get home slow and steady at 15-20km/h with no problems but if I tried to push it any more, the engine would stall. I expected it was a carburetor blockage preventing enough flow of petrol or air so took off the carb and cleaned it out. Having put it back on, the problem remains unchanged. Engine fires up fine, revs fine in neutral and will drive at 10-20kmh but cuts out under any real load. I've checked there is no blockage in the fuel line - it flows fine to the carb. I've cleaned the air filter and run the engine with it off and also changed the spark plug just for good measure but nothing has made any difference. Even if there is no fuel reaching the carb from the petrol tank, the fuel in the carb bowl is enough to drive 300-400m at normal driving speed (I know this having once left the fuel tap turned off after doing some repair work) so I'm struggling to work out why the engine stalls immediately if I rev it when in gear. Does anyone have any suggestions?