Hi Freddy, nice mower you have there. Good pick up.
In answer to your questions, leaving the plug sitting near the hole won't cause any sort of ignition to cause concern. As long as the mechanical parts are good, the three things an engine needs to run is Fuel, Spark, and Compression. So the miniscule amount of uncompressed fuel that would be present won't do anything.
I can't see any issue with shorther blades as long as the blade disc is still balanced.
Cheers, Greg.
Last edited by Greg Holmes; 10/11/11 01:10 AM.