I have a self propelled petrol mount-field lawnmower that I have had since 2004, and for the first time last week it would not stop when the throttle was let go. I had to push the throttle cable in by hand very hard to just about stop it.
At first I thought it stops by friction from the pad what brushes up against the flywheel, but now I think the thin wire what attaches to the brass bit, shorts the coil/armature out to ground when the throttle is let go, thus stopping the engine.
Below is a couple of pictures of the stopping mechanism what I have cleaned up. Can this part still easily be got if it needs replacing, or do I just need to bend the brass pointy bit down with force?
[GALLERY=media, 98086]stopping mechanism by eveares posted 21 Jul 2016 at 4:04 PM[/GALLERY]
[GALLERY=media, 98087]Close up of ground switch by eveares posted 21 Jul 2016 at 4:04 PM[/GALLERY]
At first I thought it stops by friction from the pad what brushes up against the flywheel, but now I think the thin wire what attaches to the brass bit, shorts the coil/armature out to ground when the throttle is let go, thus stopping the engine.
Below is a couple of pictures of the stopping mechanism what I have cleaned up. Can this part still easily be got if it needs replacing, or do I just need to bend the brass pointy bit down with force?
[GALLERY=media, 98086]stopping mechanism by eveares posted 21 Jul 2016 at 4:04 PM[/GALLERY]
[GALLERY=media, 98087]Close up of ground switch by eveares posted 21 Jul 2016 at 4:04 PM[/GALLERY]
