Lawn mower problem(doesn't stay running)

iwannadie

NAXJA Forum User
Location
Gilbert, Az
So, my brother inlaw has a push mower(I don't have make/model details yet) and says it will start but not stay running. It will die off in a few seconds unless he presses and holds the fuel primer bulb after it starts. It will stay running for as long as the primer bulb is held in.

Sadly there has been Zero maintenance done to this mower for I'm guessing 5+ years. I said before I even attempt to look at it he has to at least buy a tune up kit for the thing.

I wasn't sure if bad oil, spark plug or air filter would cause that behavior though? I'm not sure if it has a fuel filter being just a push mower, I know mine doesn't have one. My first guess is it's not getting fuel and holding the primer bulb is helping that. Or maybe the carbs are all gummed up because he didn't think to add fuel stabilizer either.

I'm going to take a look at it next weekend and just thought I would start asking around for what to look for. I am going to find out the make/model also as soon as I can.
 
A number of small engine carbs that use prime buttons have a diaphram instead of a fuel bowl. The diaphram acts as a fuel pump and works off engine vacuum pulses. When the diaphram gets a hole in it, the engine will run as long as it has that initial squirt of fuel lasts.

If the mower has ever been run out of fuel and left that way for some time, that diaphram will dry out and crack.

Ron
 
I have an older mower, 17years? Primer button bypasses the float and bowl. On the bottom of the float bowl there is a 10mm nut. The orifice tube that the float needle sits in is attached to this nut. When mine acts up (like you are describing) I take the nut off and blow out whatever crud is gumming up the little holes in this orifice tube. You may need to use like 1 strand of small gauge copper wire to help clean out the holes. Be careful, dont want to enlarge any of them. Have no idea if yours is similar or not, but this is what I do...HTH...

FWIW, I have never replaced the plug, or cleaned the air filter. Changed the oil once. At the end of the season, empty the tank and just run the thing dry, forget about the Stabil or whatever, unless you have one like Zuki-Ron is describing.
 
If that doesn't work, you could always try this!

We have the standard 6 ft. fence in the backyard, and a few months ago, I heard about burglaries increasing dramatically in the entire city. To make sure this never happened to me, I got an electric fence and ran a single wire along the top of the fence.

Actually, I got the biggest cattle charger Tractor Supply had, made for 26 miles of fence. I then used an 8 ft. long ground rod, and drove it 7.5 ft. into the ground. The ground rod is the key, with the more you have in the ground, the better the fence works.

One day I'm mowing the back yard with my cheapo Wal-Mart 6 hp big wheel push mower. The hot wire is broken and laying out in the yard. I knew for a fact that I unplugged the charger. I pushed the mower around the wire and reached down to grab it, to throw it out of the way.

It seems as though I hadn't remembered to unplug it after all.

Now I'm standing there, I've got the running lawnmower in my right hand and the
1.7 giga-volt fence wire in the other hand. Keep in mind the charger is about the size of a marine battery and has a picture of an upside down cow on fire on the cover.

Time stood still.

The first thing I notice is my pecker trying to climb up the front side of my body. My ears curled downwards and I could feel the lawnmower ignition firing in the backside of my brain. Every time that Briggs & Stratton rolled over, I could feel the spark in my head. I was literally at one with the engine.

It seems as though the fence charger and the piece of shit lawnmower were fighting over who would control my electrical impulses.

Science says you cannot crap, pee, and vomit at the same time. I beg to differ.
Not only did I do all three at once, but my bowels emptied 3 different times in less than half of a second. It was a Matrix kind of bowel movement, where time is creeping along and you're all leaned back and BAM BAM BAM you just crap your pants 3 times. It seemed like there were minutes in between but in reality it was so close together. It was like exhaust pulses from a big block Chevy turning 8 grand.

At this point I'm about 30 minutes (maybe 2 seconds) into holding onto the fence wire. My hand is wrapped around the wire palm down so I can't let go. I grew up on a farm so I know all about electric fences. But Dad always had those piece of shit chargers made by International or whoever that were like 9 volts and just kinda tickled.

This one I could not let go of. The 8 ft. long ground rod is now accepting signals from me through the permadamp Ark-La-Tex river bottom soil. At this point I'm thinking I'm going to have to just man up and take it, until the lawnmower runs out of gas.

'Damn!,' I think, as I remember I just filled the tank!

Now the lawnmower is starting to run rough. It has settled into a loping run pattern as if it had some kind of big lawnmower race cam in it. Covered in poop, pee, and with my vomit on my chest, I think 'Oh God please die...
Pleeeeaze die'. But nooooo, it settles into the rough lumpy cam idle nicely and remains there, like a big bore roller cam EFI motor waiting for the go command from its owner's right foot.

So here I am in the middle of July, 104 degrees, 80% humidity, standing in my own backyard, begging God to kill me. God did not take me that day. He left me there covered in my own fluids to writhe in the misery my own stupidity had created.

I honestly don't know how I got loose from the wire.

I woke up laying on the ground hours later. The lawnmower was beside me, out of gas. It was later on in the day and I was sunburned.

There were two large dead grass spots where I had been standing, and then another long skinny dead spot where the wire had laid while I was on the ground still holding on to it. I assume I finally had a seizure and in the resulting thrashing had somehow let go of the wire.

Upon waking from my electrically induced sleep I realized a few things:

1 - Three of the fillings in my teeth have melted.

2 - I now have cramps in the bottoms of my feet and my right butt cheek (not the left, just the right).

3 - Poop, pee, and vomit when all mixed together, do not smell as bad as you might think.

4 - My left eye will not open.

5 - My right eye will not close.

6 - The lawnmower runs like a sumbitch now. Seriously! I think our little session cleared out some carbon fouling or something, because it was better than new after that.

7 - My nuts are still smaller than average yet they are almost a foot long.

8 - I can turn on the TV in the game room by farting while thinking of the number 4 (still don't understand this???).

That day changed my life. I now have a newfound respect for things.
I appreciate the little things more, and now I always triple check to make sure the fence is unplugged before I mow.

The good news, is that if a burglar does try to come over the fence, I can clearly visualize what my security system will do to him, and THAT gives me a warm and fuzzy feeling all over, which also reminds me to triple check before I mow.
 
Lol you gotta share where that quote came from, that's fawkin hilarious.
To put 'fawkin hilarious' in perspective, there's a party at my place right now, a friend just asked me "how do you spell drunk?" while texting, and it was lingerie night at the night club last night, and reading that was STILL the most entertaining thing I've done all week... and it's been a damn good week lol.
 
for maintenance, I take out the plug and spray directly inside the spark plug hole, with carb cleaner spray. let it dry, then replace the plug. start it up and she usually runs better. It is better if the engine is warmed up before you do the spray.

every other gas refill, I put a shot or two of carb cleaner fluid in the gas tank.

I have old mowers, but the engines purr like kittens!

BOB
 
Lol you gotta share where that quote came from, that's ****in hilarious.
To put '****in hilarious' in perspective, there's a party at my place right now, a friend just asked me "how do you spell drunk?" while texting, and it was lingerie night at the night club last night, and reading that was STILL the most entertaining thing I've done all week... and it's been a damn good week lol.

lingerie night in night club is just exciting concept. I have been to such parties and they are too hard with lots of fun
 
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