Yeh, I've just had the same thing happen to me as well, I was half way through cutting the grass in the back garden when I stopped to empty the grass box (vision compact 350), when I went to restart, the motor fired up for a second and then cut out, the fuse in the plug is fine, (and the socket its plugged into), the power lead hasn't been caught, I've had the cover off the motor and there's no smell of burning and the brushes look OK. When I opened up the switch box on the handle I did notice a slight smell of burnt out circuitry, as the switch itself seems to be OK, I'm guessing its going to be the capacitor attatched to the switch which has gone (it's a little rectangular yellow block with 2 solid wires coming from it to the switch on mine). The capacitor is availabe online for £2.99 and is most likely the cause of the problem, a lot cheaper than a new lawnmower! This may not be the same problem for everyone, but the switch and the capacitor are the cheapest bits in the mower at £2.99 each, the motor will cost £40 - £45 and would be the next thing to try.
Davie, May 2009