My uncle's Toro blower is defying all efforts. It will not turn over. It has a new plug and ignition module. I have tested the wires to the switch and the switch. I pulled the flywheel and checked the shear pin. The ignition module is grounding properly. I contacted my friend who has been in the repair business for years and he said " you covered all the bases that know ". I didn't do a full compression check. So I guess that could be an issue, but the compression does seem good. If anyone has an idea, please assist.