Welcome onemonk909. That looks to have a Briggs 4-cycle.
Lawn-Boy - Walk Behind Mower, Insight Self Propelled Model 10682
Is the smoke blue or more black? Also were exactly is the gas dripping from? Around the carburetor?
Blackish smoke and gas dripping around the carb sounds like some dirt has got into the carb and making the float stick thus making the engine run real rich.
Blueish smoke could be several things from a bad piston ring, crankcase gasket leak, crankcase venting problem, or maybe even something as simple as a missing seal on the oil dipstick tube. Is there oil around the air filter?
Either of the above can make the engine have a sort of knock sound as the governor opens the throttle wide open trying to keep the engine from stalling.
(Also you may well already be aware of it but some are not. When tipping the mower over to one side or the other oil can be sucked into the cylinder and take awhile to burn off all the while spitting some out the exhaust.)
My first and foremost guess would be a stuck float.
Lawn-Boy - Walk Behind Mower, Insight Self Propelled Model 10682
Is the smoke blue or more black? Also were exactly is the gas dripping from? Around the carburetor?
Blackish smoke and gas dripping around the carb sounds like some dirt has got into the carb and making the float stick thus making the engine run real rich.
Blueish smoke could be several things from a bad piston ring, crankcase gasket leak, crankcase venting problem, or maybe even something as simple as a missing seal on the oil dipstick tube. Is there oil around the air filter?
Either of the above can make the engine have a sort of knock sound as the governor opens the throttle wide open trying to keep the engine from stalling.
(Also you may well already be aware of it but some are not. When tipping the mower over to one side or the other oil can be sucked into the cylinder and take awhile to burn off all the while spitting some out the exhaust.)
My first and foremost guess would be a stuck float.