This was a replacement part for my TurboLite 350 mower. I looked at the youtube videos on how to replace them, and there was no video for any Flymo model anything like the unit I have, so I just went ahead and tried anyway. It took me about a half-hour to carefully disassemble the mower very carefully, (it takes 10min on the video for other models), and then another 10-15min to put it back together. It actually seems to work better than it did before the old belt broke (which broke after only 5-6months of light use on a small yard, I beleive it just slipped off the drive and started wearing through).
Would give more stars if the supplier had a how to video for my TL350 model (the only Flymo currently for sale in Australia as it happens).
Not too difficult to fit. Take care to tension the belt enough to avoid it squealing when starting. Used several times now without trouble. Hope it lasts better than Flymo's original which shredded after very little use.