I have a Flymo mower whereby the blade is not spinning. The power seems to be fine as when starting, the fan noise comes on, however the base holding the blade does not spin.
Hi Sam - I've just experienced the same problem - after a quick inspection I found that the belt had snapped. A Flymo J4 drive belt is all you need at a cost of about £2.59 - see here: http://www.espares.co.uk/part/lawnmowers/flymo/hover-compact-300/p/1116/283/116/551781/552654/j4-drive-belt.html
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix lawn mowers.