Drain the oil and gas out of the crankcase and put oil back it should be OK
Apparently you didn't crank it up. You are still here. Nothing except it may clean out some old dirty oil. Remove the gas and the oil and discard same. Refill the oil section and refill the gas tank. Don't do that again.
it is gas only no oil is added to the gas
Not really sure what you're getting at. If your lawnmower engine is a 2-stroke then you need a mixture of oil and gas to run it.
to put the oil in the lawnmower's crankcase would be fine, so long as it is an appropriate viscosity.
If your lawnmower is a 2 stroke mixing oil in the gas is what it needs to run right. If your lawnmower is a 4 stroke mixing oil in the gas fouls the plug and makes it not run.
this should be a straight gas application......4clcle, right? You shouldn't have to mix oil in the gas.
If the lawnmower has two compartments one for gas and the other for the oil, then put gas in the gas and a 30w type oil in the oil compartment. Simple as that. If you have an engine with only one compartment then you'll need to check on the manufacturers suggestions which is usually 40:1 or something close.
40:1
You get engine damage from lack of lubrication
generally in a lawnmower you use straight gas. there should be oil in the crankcase for engine lubrication. check the owners manual for proper oil weight
your float and or needle valve is allowing gas to flow through carb into engine.These should be replaced.
Yes 10w30 is a good oil for snowblower or lawnmower.