If it starts easily, seal leakage is very unlikely, in my experience of 2-strokes.

So you've learned a lesson about removing the ignition lead from the plug - bet you won't forget that one! grin

The lower seal is much more failure-prone on mowers, as string, hay band etc. left lying around, winds around the shaft, and eventually eats the seal.

This ODK thread has some more detail on that problem; https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=62257#Post62257

Edit: The bottom seal check is more easily performed if the flywheel cowling has been removed, so that the flywheel can be turned by hand.

Last edited by Gadge; 07/04/15 01:15 AM. Reason: Add tip
Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."