Anyone Know Anything About Lawn Boy Lawnmowers?

[Husky Joe]

My POS Lawn Boy wouldn't start this spring so I went and bought a new sparkplug. In the meantime, I noticed that the gas had leaked out of it onto my garage floor. I popped the plate off the bottom and found gas in there. Looks almost like a muffler or exhaust pipe running through that little chamber.
Any ideas on what my problem is?

 

[cgraham1]

That's not a chainsaw. You're in the wrong forum.

 

[Rookie1]

Lol. That is the exhaust system. While it's open pop the pipe out and see if it's plugged with carbon. If gas was coming out then it was flooded and you have to figure out that problem.

 

[blsnelling]

Cleaning the exhaust port on those is general maintenance. They are known to plug.

 

[pioneerguy600]

Your carb float and or needle valve is stuck open.

 

[frogdaddy]

My POS Lawn Boy wouldn't start this spring so I went and bought a new sparkplug. In the meantime, I noticed that the gas had leaked out of it onto my garage floor. I popped the plate off the bottom and found gas in there. Looks almost like a muffler or exhaust pipe running through that little chamber.
Any ideas on what my problem is?

View attachment 354086

View attachment 354087

The reed valve in behind the carb could be rotten away and the needle valve stuck open the gas would flow freely into the crankcase. Lawn boys are bad for this.

 

[frogdaddy]

Hey, I see you have got a self propelled one. Cool. Let me guess- 6.5 hp silver edition commercial right?

 

[GrassGuerilla]

So, you don't shut the fuel off eh? Since you got it apart, de carb that muffler (always wondered where it was hmmm?). If its the needle valve, you might get by with simply shutting off the fuel valve when it isn't running. Likely some debris lodged in there.

There is simply nothing available on the market today to replace that mower. Nothing. So in my opinion, its worth whatever it takes. I'd bet on the needle and seat.

Love mine.

 

[GrassGuerilla]

Hey, I see you have got a self propelled one. Cool. Let me guess- 6.5 hp silver edition commercial right?

I'm guessing its a 4 or 4.5hp. Judging by the bottom.

 

[frogdaddy]

Possible and your right nothing can replace a lawn boy
If you can't tell 2 stroke lawn boys are kinda my thing.

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[frogdaddy]

Oh yeah the float is made out of cork and they tend to get waterlogged and won't float. That will cause the needle valve not to get closed.

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[Rokon]

Who knew we had so many closet mower guys in here. opcorn:

 

[Deleted member 83629]

overhaul the carburetor and take the muffler and exhaust pipe and put it in the gas grill and let it smoke and flame till the carbon powders out.
only way I know to clean lawnboy mufflers as I own one from 1979.
CJ14 champion is what it uses and add a fuel shut off valve while you are at it those carbs are bad about leaking needles and seats and filling the engine with mix. turn the valve run it dry and store it.
yours looks like a duraforce engine E series 6.5 hp

 

[frogdaddy]

overhaul the carburetor and take the muffler and exhaust pipe and put it in the gas grill and let it smoke and flame till the carbon powders out.
only way I know to clean lawnboy mufflers as I own one from 1979.
CJ14 champion is what it uses and add a fuel shut off valve while you are at it those carbs are bad about leaking needles and seats and filling the engine with mix. turn the valve run it dry and store it.
yours looks like a duraforce engine E series 6.5 hp

That is what I was think about engine size. That is a great idea with the shut off valve .

 

[7sleeper]

Ours died sadly after more than 25 years of use. The last years where the worst, mowing 3/4 acre high grass.

7

 

[Husky Joe]

Many thanks and my apologies for posting here but I figured there'd be some help. Yeah, it's a 6.5hp Duraforce. The carb might be over my head so I may drop it off at the local shop. I have a dealer just 2 miles from the compound. I had a steep hill to mow where I lived before but I don't mow much at my new place---out in the woods---but I mow my sand mound twice a summer.

 

[67L36Driver]

Cleaning the exhaust port on those is general maintenance. They are known to plug.

My silver series is 25+ years old and I havn't had to clean the exhaust port yet. Synthetic oil mix. 32:1 Feed same to saws.

Those are known to burn a hole in the 'muffler' cover.

 

[67L36Driver]

My very first Lawnboy was an 18" made in 1967. That one I ran on Quaker State outboard motor oil. Big mistake as it plugged the exhaust port on a regular basis. Changed to a mix using Lawnboy synthetic and problem went away.

 

[cmarti]

Pioneerguy has it right. Notorious for float problem. Depending on year, it may be cork. Funny you bring this up, I had a lawn boy weekend getting some of mine roaring.

 

[frogdaddy]

While you got the carb off take a flashlight and look down the intake and see what kinda shape the reed valve is in.