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  #1  
Old 07-09-2014, 10:59 AM
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mwalz mwalz is offline
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Lanwboy will not stay running

Trying to fix a lawwn mower for my grandmas neighbor. It's a lawnboy. Not the 2 cycle kind, the other. What will happen is that i can get it to fire up with some carb spray, but it only last a few seconds. The carb is clean and the float is working properly and there are no holes in it. No leaks of gas, i have tried different combinations of stuff, still no luck. I got i started for 10 seconds, but it was on low rpm and when i moved the throttle, it died, which is what it does every time. Spark plug is also ok. Any ideas?
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Old 07-09-2014, 11:04 AM
ducnut ducnut is online now
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It's not getting fuel.

Drain and flush the tank. If it has a fuel filter, change it. Go through the carb, again. Soak the carb in Berryman cleaner, overnight. I use Mag1 brake cleaner, for final cleanup, as it leaves no residue. When I put in fresh gas, I always add a little Sea Foam.
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Old 07-09-2014, 11:39 AM
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JimQ JimQ is offline
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I have no idea what engine we're talking about here so just a guess...

Did you clean out the main jet orifice in the bowl nut?

Q
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Old 07-09-2014, 12:29 PM
scag2015 scag2015 is online now
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Yep definatly not getting fuel, but find which part is the culprit might be interesting has the mower had gas sitting in it?
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Old 07-09-2014, 01:00 PM
herler herler is offline
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Well, if it looks anything at all like the kind of mowers that tend to come to me, who knows what could be wrong with it...
I'd start by checking the oil, hopefully it has the right kind of oil in it, hopefully it isn't pitch black, and hopefully it's the right level.
If all that adds up, there's a good chance it could be a simple fix.

You know, a simple oil level check tells me a lot about how well the mower's been maintained.
I'd check the air filter as well, how clean is it...
Usually I check the blades last, to see if they're sharp...
And so on, I can tell just by looking at the mower whether it has had its periodic maintenance done.

If it has not, or doesn't look like it has?
That probably means it needs a good cleaning, a properly gapped spark plug, a new air filter...
That's just for starters, one to two hours if you've done this a number of times before.
Half the afternoon if it's your first.

We're talking it could be most anything, but like with many machines who see little maintenance it's probably best to start out by getting all the periodic maintenance out of the way.
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Old 07-09-2014, 08:20 PM
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mwalz mwalz is offline
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Well the oil is at correct level and is pretty much black. I'll soak the card this week sometime. If I can get it running I'll sharpen blade and all that. Brand new air filter was put in by the guy and it was running earlier this year. I'll drain the oil and put in the right stuff. No filters of any kind on it except air filter. Overall it's in pretty rough shape. After I soak carb, change oil, I'll post an update of the situation then. Thanks for the help everyone.
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Old 07-10-2014, 09:51 AM
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JimQ JimQ is offline
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Quote:
Originally Posted by JimQ View Post
I have no idea what engine we're talking about here so just a guess...

Did you clean out the main jet orifice in the bowl nut?

Q
See above.

Clean the bowl nut orifice (main jet) and it will run just fine. (assuming fuel is getting to the bowl)

No need for any real work to get her going. Just take a 1/2" wrench to the bottom of the float bowl and take the bowl nut off. Clean the small orifice in the center and put it back in.

When you're looking at the bowl nut you will find one cross drilled hole. That feeds the jet. The small orifice in the center is the critical one.

Good luck with your project!

Q

Last edited by JimQ; 07-10-2014 at 09:55 AM.
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  #8  
Old 07-10-2014, 10:25 AM
ducnut ducnut is online now
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That mower looks like it lives outside. If so, definitely drain the tank.

I worked on one, a few weeks ago, that lived outside (his gas can does, too). There was water in the tank and the carb was full of algae. After I got it running, I went through everything else. Guy was very appreciative and tipped me $15, for the extra effort. Told him to dump out his gas can, as well. Start fresh and add Sea Foam.
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1st Class Lawn Service

'13 Hustler X-ONE, 60", Kohler ECV749 EFI
'05 Hustler FasTrak, 42", Honda GXV530
'13 Toro Timemaster 30"
'02 Lawn Boy SilverPro 21"
Stihl BR600 blower
Stihl BG55 blower
Stihl FS55R trimmer
Stihl KM55R Kombi system
Stihl MS180C chain saw
Stihl HS45 hedge trimmer
RedMax Reciprocator
Echo SRM225 trimmer
Echo GT-2000 trimmer
Gravely WB edger
'14 Ariens Compact 24" Sno-Thro
'08 Troy Bilt Squall 2100
'06 Chevrolet Silverado
'13 Bravo Star, 7'X12', V-nose
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