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  #1  
Old 05-22-2016, 05:37 AM
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Default My Lawn Mower

stopped working while I was cutting the grass.
This thing has been 'old faithful' for nearly fifteen years. It was made in Ohio by Murray, with a Briggs & Stratton Industrial/Commercial engine.

Being an air cooled 4-cycle, I use Shell Rotella-T oil. My backup emergency generator has a B-S engine with an oil level switch that shuts off the spark but this one is a smaller engine with no fancy bells or whistles except that it is self-propelled.

Anyway, I was happily mowing when all of a sudden the thing died. It had plenty of gas. I checked and the oil level was down slightly so I topped that off.

Normally, I push a prime bulb three times and this baby takes off on the first pull. But this time, nothing. Ok, so I got out the starting fluid, gave it a shot, pulled the rope and it came to life. Then it died as soon as the ether was spent.

I'll get into it in the morning (noon is morning to me). - Dave
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Old 05-22-2016, 10:08 AM
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Dave don't you just hate that Maybe the neighbours will think it is your version of a crop circle...
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Old 05-22-2016, 12:32 PM
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HA! Yeah, Dano... the idea of borrowing someone's goat crossed my mind, too. When I sleep on a problem I mull it over many times more than I should. I guess it's called, 'overthinking the problem'.

Robin said the mower is 'old'. I thought, 'how old is it? Let's see, 15 years means, five months or 22 weeks times 15 = 330. It doesn't take a whole hour to do the grass but let's say it does. That's only 330 hours total on this motor, which is nothing. I think I have more than that on my generator because a few times it was on for a few days straight. The generator is about as old.

It only takes three things to make an engine work, spark, fuel and air. I have spark and air. Time to look into the carb... - Dave
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Old 05-22-2016, 06:06 PM
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I performed surgery on the carb only to find nothing wrong with it. I put it back on the mower and the symptoms were the same.

I got another trick up my sleeve. I'm going to make a temporary fuel tank out of a 1-qt oil bottle. Let's see how that goes.. - Dave
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Old 05-22-2016, 11:14 PM
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Eureka! I cranked up the mower with my temporary fuel tank. It stayed running after I finished mowing the grass.

Now, I have to fix the original tank. It's plastic and easy to remove. I probably should have started troubleshooting there.

It must have some kind of filter in it that clogged but I can't see it. Maybe if I back-wash it and blow air through, it will last another fifteen years.
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Old 05-23-2016, 01:37 AM
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Well I at least knew it wouldn't be a bad ground! Hehehe...
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Old 05-23-2016, 01:54 AM
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Tom, I could have used one of those very large magnifying glasses you Detectives have. I'm used to working on huge engines with no troubles seeing. This carby fits in the palm of my hand. I was afraid it would slip through my fingers and get lost.

Robin was gracious and didn't ridicule the 'big engine troubleshooter' for having the lawnmower down for two days. At least it didn't cost money to fix. As soon as I finished cutting the grass, things were ok with Mama, TG. - Dave
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Old 05-23-2016, 09:41 AM
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Dave glad to see you completed repairs and that the lawn has been cut. You know the saying " Happy wife Happy Life "
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