Well after a good run for a few weeks the worm gearbox appears to have failed.
The tillers turn away happily until there is any resistance and then all you can hear is grinding 😞.
All oil levels were checked before use and ok. I had a quick look but without a full strip down I am guessing the worm gear is worn beyond meshing point.
Doe anyone know if this is a common issue ? If so what is the usual cause.
I am Now going to try and source a replacement unit.