LAWN BOY issue.


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Old 09-11-12, 01:10 PM
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Question LAWN BOY issue.

Hello, OK, I have a 21" 2-cycle push Lawn Boy, probably a 1990 's model. Actually the model number is, 10424, SR.# 9902213.

I have taken good care of this unit, but recently after running the mower for 10 minutes it sputters, and dies. I pump the primer bulb a few times and it starts, but after a minute or so it does it again.

I figured WATER IN THE FUEL, so dumped the fuel in the mower tank, dumped all the fuel in my filler can, and added NEW fuel, not any fuel I had, but direct from the station pump into my container. I also stuck a clean rag in the tank, and with a long screw driver probed for any fuel left in the mower's tank.

I added new fuel, and all seemed well, but after cutting for 15 or so minutes it died again. If it sits for a few seconds, and is primed, well it will start, but won't run for more that 30 seconds.

Any suggestions will be most welcomed, THANK YOU..........

Dale in Indy
 
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Old 09-11-12, 01:34 PM
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could be running to hot. wrong fuel mix OR.
try taking out your air filter. maybe after it warms its not getting enough air flow
 
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Old 09-11-12, 03:44 PM
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Check the fuel tank vent on the cap. Make sure it is venting.
 
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Old 09-11-12, 04:03 PM
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Thanks, but NO DICE......

Not the air filter, not the cap, ran it without filter, and cap, and after approx. 3 minutes of cutting, it just sputters then dies. If I hit the primer bulb as it is dying, it will fire for a few seconds, then won't fire up again until it sits for a few minutes.

I will start all over with new fuel, and mixed at 32-1 and see, but I have been mixing fuel for this and all my Sthil equipment for years and no issues.

I also changed the spark plug tonight, it was very wet, NOT SURE IF THAT IS NORMAL OR NOT????

Sure seems like water in the fuel, is there a float bowl that could have some water in the bottom?

Thanks,

Dale in Indy
 
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Old 09-11-12, 06:09 PM
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Yes, the float bowl could hold some water but in that case it wouldn't run at all if water was there. You may have a stuck float needle or a fuel line collapsing. Good luck.
 
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Old 09-11-12, 06:24 PM
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Thanks, I will look into your suggestions.

Dale in Indy
 
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Old 09-11-12, 09:07 PM
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I think I found the problem..................., I removed the fuel line where it enters the carb, some fuel drained out, some evaporated on the concrete floor but a spot didn't, so I suspect WATER was in the carb.

I ran it for 15 plus minutes, and it didn't quit, so I will cut the grass tomorrow, and know for sure.

Keeping my fingers crossed, hehehe.

Dale in Indy
 
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Old 09-11-12, 09:37 PM
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YEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA, I hope that will fix it. Good Luck.
 
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Old 09-12-12, 12:24 PM
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Well, still an issue. Today it ran approx. 15-20 minutes, seems to start sputtering when pushing the unit UP A HILL, it sputters, then 10 seconds it dies, and if you wait a minute and hit the primer bul it starts, runs a minuted, then quits. Each time it runs a short time period.

I am going to try new fuel once again, starting to think it is heat related.

I will keep you posted.

Dale in Indy

I don't give up easy.
 
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Old 09-12-12, 02:52 PM
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Please check the Float in the Carburetor.
 
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Old 09-13-12, 12:59 AM
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Have you checked actual fuel flow from the tank?
 
 

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