Petrol brush cutter (Cutteslowe OX2)

Old, but I think little used brushcutter with reel of line and Kawasaki 2-stroke petrol motor. I have had it working, but as it is two-stroke petrol it needs regular use, and last time I wanted to start it I gave up. Can't find the shoulder strap either but will keep looking. The reel has a fairly good supply of line. Possibly spares or repair, but may just need clean fuel and someone with a strong arm.