There isn't one! Honda asks you to tip the motor on its side, and drain the oil from out of the fill tube.
If it like most Honda engines, the whole engine needs to be removed from the deck to get to the drain plug. As this is not an easy task, the best way is to turn the mower on it's side (make sure you do not turn it onto the carburetor side) and drain the oil from the fill tube.
where is the coolant drain plug on the engine block of Honda ACCORD 2.4 2006
2006 honda odyssey engine oil drain plug torque
The drain bolt in under at the rear of the engine.
The 1999 Honda Accord air conditioning drain to can be located on the bottom of the air conditioner compressor. The drain to allows condensation to drain on the ground below the engine.
run the engine out of gas!
Bottom of the engine on the oil pan.
Remove the oil pan drain plug to drain the oil. Remove the lower radiator hose to drain the coolant.
Oil drain plug is located at the back of the engine, right side, ( foot brake side ) towards the bottom of the engine.
Bottom of the engine on the oil pan.
The oil drain plug is located on the bottom of the engine near the oil filter.
Oil drain plug is on the left side on bottom of oil tank. Dry sump engines do not have drain plug on engine.