Walk behind Lawn-boy will not start

[denwayanderson]

Hello all,

I have a lawn boy push mower that will not start. I have changed out the cd pack and cleaned the carburetor inside and outside. I recently had a plug that was too long and I think it hit the piston, however, there does not seem to be any damage to the piston head as observed from the spark plug hole.

Any suggestions would be appreciated.

 

[Two-Stroke]

What is the model number?

And what's a "cd pack"?

 

[Fireman 123]

Hello all,

I have a lawn boy push mower that will not start. I have changed out the cd pack and cleaned the carburetor inside and outside. I recently had a plug that was too long and I think it hit the piston, however, there does not seem to be any damage to the piston head as observed from the spark plug hole.

Any suggestions would be appreciated.

Have you verified if the new coil is throwing a spark? Is the clearance between the coil and flywheel set right? What does the compression feel like? I'm guessing it's a 2-stroke? While you're at it, pull the muffler and check the exhaust ports for any carbon build-up. Two things the 2-stroke engines need to run are compression, and clean exhaust flow. Thats how they pull their fuel. I hope I was of some help. Good luck

 

[denwayanderson]

Yes, the coil is showing a spark through the spark plug. when I pull the starter rope I can actually hear the compression from the cylinder, but will not start. Yes, it is a 2 stroke engine(gas/oil). I have not checked the muffler, but I will check for carbon buildup. Thanks for your help

 

[denwayanderson]

What is the model number?

And what's a "cd pack"?

cd pack is the coil, plug wire combo

model number is 10545

Thanks

 

[Fireman 123]

Yes, the coil is showing a spark through the spark plug. when I pull the starter rope I can actually hear the compression from the cylinder, but will not start. Yes, it is a 2 stroke engine(gas/oil). I have not checked the muffler, but I will check for carbon buildup. Thanks for your help

Ok. Thanks for giving the model #. Check to see if the spring on the air vane governor is out of adjustment. The thumb-wheel it's attached to is where you set the throttle. Right to increase. Left to decrease. It will make a clicking sound when you do so. I would tighten it snug, and then back it off a couple clicks. At least I've found it works for me. Good luck

 

[Fireman 123]

Ok. Thanks for giving the model #. Check to see if the spring on the air vane governor is out of adjustment. The thumb-wheel it's attached to is where you set the throttle. Right to increase. Left to decrease. It will make a clicking sound when you do so. I would tighten it snug, and then back it off a couple clicks. At least I've found it works for me. Good luck

Reason I say that is because after putting a new carb on my 8243 I pulled to my hearts desire with nothing until I found how to set the gov!

 

[Two-Stroke]

Ok. Thanks for giving the model #. Check to see if the spring on the air vane governor is out of adjustment. The thumb-wheel it's attached to is where you set the throttle. Right to increase. Left to decrease. It will make a clicking sound when you do so. I would tighten it snug, and then back it off a couple clicks. At least I've found it works for me. Good luck

That's a handy little fact. Thanks for posting that, Fireman123.

Getting back to the original question, I would try priming the engine by squirting a little gas/oil into the carb. It should fire and run briefly if everything is OK with the ignition system.

If it does fire the problem is in the fuel system.

 

[denwayanderson]

How is the best way to pull the under deck muffler. I have tapped with rubber mallet and it will not give. if there a clip cholding the mulching flange to the crankshaft? I can not see one..

thanks

Dennis

 

[Fireman 123]

How is the best way to pull the under deck muffler. I have tapped with rubber mallet and it will not give. if there a clip cholding the mulching flange to the crankshaft? I can not see one..

thanks

Dennis

If you're talking about the blade adaptor, the best way I've found to remove it is by leaving the nut threaded onto the shaft and tapping it with a hammer while prizing on it. It will eventually give just be careful not to damage the threads or the adapter. After it's removed, you'll find 3 bolts holding the muffler to the engine/deck plate. After the muffler is removed you'll find the 3 exhaust ports.