Just bought a 10 year old lawn boy 2 cyl mower from my neighbor. He had not used it for 5 yrs (heart problems). I put the 2 cyl ashless oil into the gas like the instructins said 32/1 mix. That turned out to be 8 oz to 2 gal gas. Well it started fine but it is sputtering and blowing blue smoke bad. I did manage to keep it running to mow the lawn (30 min) with no change to the amount of smoke or the Low power output and sputtering. any ideas bryan

What is the model number of the mower? The picture posted by your question shows the 4 cycle Briggs & Stratton powered mower.

Did you run it for a long time? Five years would allow all gasoline to evaporate, but not the oil. You might have double the oil in the system.

If this is has the Lawn Boy OMC motor, excessive smoking can be caused by:

a worn crankshaft seal

a carbon-fouled muffler

carbon-fouled piston exhaust ports

a defective fuel primer circuit (sometimes disconnecting the primer button hose will stop the smoke ...carb work needed if this is it)

a fouled plug (causes incomplete combustion... and smoke)

weak reed valves (a constantly wet air filter is a sign of this)

An engine smoking and with low power could mean the piston rings in the engine have gone bad. May be time for a new one.

Sounds like you will need to clean your carburetor.
Sometimes you can get by with priming it a few times, and letting it
run a few times like that and it will flush the gunk out of the jets,
but most of the time you will need to rebuild the carburetor.
If the mower is over a couple years old, then I also recommend that you
buy and install a new carburetor repair kit, because the diaphragm will
get hard and that will cause it to be hard to crank.
When you clean your carburetor and remove the jet screws, count the
number of turns it takes to seat the jets from their original position.
That way when you go to put the jets back in, you know how many turns
they were in/out.
Please do not forget to rate me, Thanks
Good Luck, I hope this helps