The family has a old Yard-Man Tiller Model #21030-7 that recently broke down due to a badly worn chain drive sprocket.
The tiller is 30 years old, but only saw about an hour of use on average each year. The engine, carriage, & tines were well maintained, but the chain drive failed this year.
An inspection showed that the original grease, {the maintenance manual calls "Plastilube #0 Grease"} failed to climb the chain and keep the upper sprocket lubricated. That and some moisture probably from washing the tiller down after use, lead to corrosion and extreme wear on the sprocket.
I have an inclination that there might well be a better grease that would lubricate the chains/sprockets in the box AND resist the minor moisture intrusion from washing.
I would appreciate any advice on choosing a better grease.
The tiller is 30 years old, but only saw about an hour of use on average each year. The engine, carriage, & tines were well maintained, but the chain drive failed this year.
An inspection showed that the original grease, {the maintenance manual calls "Plastilube #0 Grease"} failed to climb the chain and keep the upper sprocket lubricated. That and some moisture probably from washing the tiller down after use, lead to corrosion and extreme wear on the sprocket.
I have an inclination that there might well be a better grease that would lubricate the chains/sprockets in the box AND resist the minor moisture intrusion from washing.
I would appreciate any advice on choosing a better grease.