Mountfield MTR 20Li Strimmer

jj@8cv

Do I have to buy a new cartridge to replace the strimmer line or can a new line be loaded on to the old cartridge

Ayr_Rage

Pages 40/41/42 of the manual advises the type of line you need and how to do it.

Google searches are brilliant, but seeing as you are having a lazy Sunday download the manual from here

https://www.mountfieldlawnmowers.co.uk/271102203-muk-mtr-20-li.html