My sister has a large lawn and uses a 10-20 year old Honda sit down mower to
mow her lawn. A couple weeks ago while mowing her lawn a large plastic bag
got caught up in the blades and jammed up the blades. I shut off the motor
and turned the tractor/mower over. She started tugging the plastic out
without regard that the blades might be engaged in any way. I tried to warn
her, but she said it's never been a problem. Am I being overly cautious?
Depends on the ignition system -- if it has a solid grounding connection
when off, I'd feel adequately protected. I personally probably wouldn't
think it likely at all that I could/would spin the engine sufficiently
working on a plastic bag to cause it to fire, but I'd certainly be
cognizant of it being a possibility.
Given the description that sounds like your sister hasn't a clue, I'd
say "no" to the question as posed and if similar occurrence would
probably pull the plug wire. Of course, you can't stop her doing
something really dumb if you're not there, anyway... :(
EVen if it can't fire, one could pull it past top dead center and the
unfired gas could make the blade spring forward past that, up to
anoher half turn, or if almost to TDC, spring back. I don't know if
it could do this with the recently added brakes such engines had, and
I don't know what the chance of hurting oneself would be, but I
woudln't want to find out.
I had to remove the brake on one of my mowers, so one that's supposed
to be there might not be.
Still, I don't take out the plug to fiddle with my mower if it's not a
big job, but I make sure I don't turn the blade more than 20 degrees
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