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Re: My lawnboy push mower was running and then suddenly...
Check to see if the spark plug is getting spark. prime the carburetor to see if you have a fuel problem. does it have fuel in it? if it starts back up after it cools off change the spark plug
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Contact your dealer ! but 32:1 sounds correct. 8 ounces of Lawnboy oil to two gallons of gasoline ....is 32:1, 8 ounces of oil to one gallon of fuel is 16:1 for the real old lawnboys,
When Toro bought out OMC,and started using Tecumseh mowers,the ratio changed in the late 80's or early nineties ! IIRC :o)
If you have the smell of rubber burning the belt isn't gripping. Make sure that there isn't anything stopping the wheels turning like old grass or even a piece of twig. If their clear try adjusting the tension on the drive pully.
Try letting go of the self-propelled lever a couple of feet prior to stopping, then try pulling back. Also, I had a Lawnboy that did this. There was a flap on the back of the mower that would curl up under the deck and actually push the transmission into gear when I pulled it backwards.
I would try and remove carb and clean it thuroughly. You can soak the parts in solvent or equivelant. The carb would be right after the air filter tube to the intake of engine.
It sounds like it is 2 stroke.
Carefully remove the carb bowl, by undoing the brass bolt.
Examine the brass bolt for a small pin-hole in the side.
Use a piece of corn-broom NEVER anything else !!! and poke the hole(S) to make sure they are clear.
Blow out with air if available.
You can use this method to clean out all the carb orifices carefully.
You may have to loosen the adjustment a bit to let the transmission tilt farther forward. Do not loosen the other nut on the adjustment, that way you will know how far to re-tighten the one you loosened when you have the belt on.
20:1 gas to oil is a good place to start. Some mowers thin down to 80:1. If you can tell me the model of the mower I can be more specific, but starting at 20:1 will assure you have adequate protection for the engine. If it's exhausting lots of oil smoke after it has warmed up; you can cut back a little each time until you have minor oil smoke.
at 20:1 you need to add 6.4 ounces of oil to one gallon of gas.
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