I have an old Flymo circa 1992 which has now had 3 motors - when one dies I nip down to the Civic Amenity Centre (Council Tip) and buy an old Flymo from the chap who has the franchise to scavenge and recycle electrical goods. My last Flymo from him cost me £3.00 and thankfully the motor was a runner.
Simple handtools and (as I recall) a soldering iron are needed to make the change.
Peccavi
April 2009