It would change the ignition timing - but virtually unheard of in
anything other than a vertical shaft single cyl direct drive rotary
This machine is neithe a direct drive nor a single cyl, and is most
likely NOT a vertical shaft engine (although it COULD be).
No spark if the safety switch(es) bad - so your guess is an
uneducated guess - and is wrong. One other thing you forgot that is
required foran engine to run - "squeeze" or compression - 110 isn't
bad - 80 is a bit low. Try putting in 2 brand new plugs of the
An uneducated guess? I've had a mowing business for almost 33 years.
1) I don't profess to be a mechanic.
2) I've never had a mower with a seat safety switch.
That said - can a safety switch not ground to chassis, or magneto
and still receive a spark? As stated, not a mechanic.
What I DO know is this - I've used twin cylinder Onans,
Kohlers, and for the last number of years, Kawasaki.
NEVER have I had engine failure as a result of a bad plug
OR a gas cap vent being plugged up. Maybe a push mower
won't start as a result of debris between the electrode and the
ground electrode... but that's about it. A spark plug will
usually last for years. Also, 80-110 pounds of pressure is
plenty. The OP would have seen other symptoms if he had
a problem such as a bad valve, broken or worn rings. He
mentioned no such foreshadowing problems. But hey, thanks
for the smartass comment.
On Tuesday, May 24, 2016 at 3:18:30 PM UTC-4, 83LowRider wrote:
Two problems with that theory.
1 - In his original post he says there is spark and every safety
switch I've ever seen that stops the engine does it by cutting
2 - In the newer post he has it running. It's clearly an issue of
fuel starvation from the new symptoms.
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