Full numbers from the front of the starter housing are 80202 2324 01 90100303 - see attached photos let me know if they don't come through. Also attached carby in open & closed throttle positions. Chains appear loose - The bolt that goes through the big cog is a touch loose, when I tighten it, the mower does not pull backwards as the left drum appears to lock, it will move forward only. The other issue as outlined in previous post - the drive mechanism is still engaged at times when the knob to engage blades is in the disengage position (is this a clutch issue?)