I know you have tried several things, so you might not object to a few more
First, try removing the air filter from your mower, and see how that works.
problem goes away, you have a clogged or dirty air filter, so replace it.
Second, replace the gas in your mower's tank with fresh stuff. If the gas has
sitting there for many weeks (hopefully not from last season), it has probably
bad. In the future, use a product called 'stabil' in your gas to keep it from
Thirdly, did you completely run the gas out of you mower last season. If any
remained behind, it would probably turn to shellac, and plug up you carboretor.
that case, you will need to have it cleaned by a mechanic.
You basically need only three things to start an engine. Fuel, spark, and
the correct air
mixture. I have covered some of the overlooked problems. Be aware
that using 'starting fluid' on a regular basis can deteriorate your engine and
attacks all the plastic parts and does other damage, as well.
Hope this helps,
Premium gas won't ignite any easier than regular gas in a lawn mower engine.
Premium gas has a higher octane rating which means it suffers less
preigniting from the heat of compression in high compression auto and
It'll just waste Betsy's money, Benzette
Jeff is right, the difference between regular and premium is minimal.
And to be honest, as most gas stations sell such a small amount of premium
gas compared to regular.
The regular is usually fresher and still fully potent.
Many times the premium is already weeks old, and slightly dead.
People who have high compression engines that need the premium will know
what I mean.
But at the low compressions in a lawnmower it doesn't make any difference
Save the 20 cents and buy the regular.
But you can add a very small amount of gas line deicer (PURE methyl/ethelene
hydrate/ alcohol) if you have a bit in the garage.
(NOT the rubbing alcohol from you medicine cabinet that already contains
But mix it into the gas can as you only need a few drops per lawnmower tank
It helps the gas fire a slight bit hotter and help pass any
water/condensation/scale through the carburetor
It may not help with your starting, but it can't hurt it.
Then pour the rest of the bottle into your car gas tank.
It may not pay to fix it, but I would bring the lawnmower somewhere else to
see if anyone else can locate the problem your neighbor seems to be missing.
It could be, dirt in carb, bad/ misadjusted/weak ignition module, pinched
spark plug wire, bent flyweel key, bad plug.
But it's impossible to tell from a usenet post.
These things are almost all cheap for parts to fix, but labour could cost
$100 or more.
It would help to know if the motor is a briggs & stratton, tecumeth, or some
other make, but I'm going to assume Briggs.
Offhand I'd check the spark plug wire is not pinched/cut in the
starter-flywheel shroud where it goes out to the spark plug since that was
removed shortly before the problems began. (to change the pullcord)
Even an experienced person can do this easily if they aren't careful as
there is only a slight bend in one spot for the wire to pass through without
If you can get the mower into the dark, try to start it and watch to see if
little faint blue sparks may be going right through the wire to the engine
Depending on the mower this wire can be part of the coil assembly, or
And sometimes just a bit of black electrical tape/shrinkwrap over the wire
can get you going again.
But as already said, this is just an internet guess.
Not that it matters for her problem, but gas does not go bad in few
weeks under normal conditions. A month or two would be more of
a likelihood of such a problem. If she had her gas in the tank for that
time period, it could have gone bad. That is why I suggested she put
in a product like Stabil just after buying the gas. If her gas is that old,
it's too late to protect it, so she should dispose of it and get fresh stuff.
Most gasolines already have about 10% alcohol in them, at least in my part of
the USA. If she bought her gas without the alcohol in it, she is better off
a different gas station who might not have water in the bottom of their
finding a station that sells gasahol. My vote goes for stale gas, not gas
with water in it.
I would recommend a product called SeaFoam, available from most
auto stores to treat the gasoline to both clean the carburetor and stabilize
the gas (similar to the Stabil product I mentioned earlier). If she did not
run the gas out of her engine last season, these additives probably won't
work, and she will need to have the carburetor cleaned by a mechanic.
A broken ignition wire is highly unlikely, but not impossible. I would do a
positive test of taking the plug out of the mower, but leaving it connected
lead wire. Then set the body of the plug next to a large metal surface of
Pulling the starter cord should then produce a healthy spark at the plug. If
she has an ignition problem such as a bad plug, ignition coil, etc.
do a more
connected to it's
of the mower.
plug. If it doesn't,
The whole part of the gas was in passing, but not even an issue here.
Since the OP never did say what make the engine is, all of us are guessing
But as the original post said the lawnmower never had any problems.
Then the rope broke and was replaced.
Then it ran good for a while, then later acted up
On newer Briggs motors you have to pull the whole flyweel cover/shroud off
the get to the rope.
If you look at the spark plug wire it comes off the coil, and just sits in
one little bend between the flywheel shroud and the block.
When putting the cover back if the wire is in the wrong spot it gets
And may not cut through right away but the mower vibration finishes it off.
A bit of moisture, and no spark
Then the spark may jump to the block rather than going to the plug.
if only the odd weak spark makes it to the plug, it will be hard to start,
but may still fire up if pulled fast enough
It's only a guess, but it would cause all the symptoms that were described
No need to take anything apart yet.
Look at where the spark plug wire goes back to the engine.
There is a very small "outward bend" in the flywheel shroud where the wire
should pass through.
If the wire is not there, pull off the cover and check the wire for ANY
Premium gas has nothing to do with her lawnmower. It is for high compression
engines, which lawnmowers don't have. Don't waste you money on this. The
key issue is to get rid of any stale gas with fresh gas. Low octane gas is good
enough. I wonder
if Betsy is just ignoring my suggestions, or she missed my
Well, it seems like you are listening to the wrong people.
Starter spray might get your mower started, and then again, it may not.
It is certainly not a long term fix, and using it repeatedly can damage
your mower. Did you check the other things like the air filter, spark to
plug, bad gas? If you can't do those things, it's time to take it in for
service. If your engine starts with the starter spray, you can pretty much
rule out the spark plug and electronics, and concentrate on the fuel
quality and air filter.
Next time you take it in, try starting it in front of the super tech to show
how you can't start it. Is there a choke on it? If so, try choking it for
a couple of cranks and then crank with no or half choke.
Oh, believe me, I already did that. After many pulls I did get it started
by pushing it away from me as I yanked. My arm still hurts. I don't think
I'd have been able to start it at all if he hadn't already gotten it
started. And as soon as I got it home it wouldn't cooperate again--took
almost 30 pulls to get it started. Like I said, my arm still hurts.
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