Neither your oil filter, or the fill cap need to be loose, the filter should be screwed on as tight as you can get it by hand only, and the fill cap should fit snugly so it does not come off. If the oil filter is loose or too tight you can blow out the seal which will cause you lose all your oil.
Air pressure could be pushing the oil cap because of trapped air in the line. A mechanic could better diagnose the issue by inspecting the vehicle.
check the cruise motor to is just above the peddle A rusty/tight throttle body. It should be by the oil dipstick + oil fill cap.
Check the oil fill cap, it should require 5w20.Check the oil fill cap, it should require 5w20.
It injects oil into the fuel/air mix.
Look at your oil cap. The weight is on the cap.
Remove the oil filler cap and there should be a dipstick attached to the cap
sight glass low right side oil should be between two lines in middle of glass. add oil? above and back round cap, flat tab plyers to remove if to tight
Oil sputter is going to be a normal thing if the oil cap is not on while the engine is running. The engine should never be run with the oil cap open. The engine actually has less compression when the oil cap is open, and this could hurt the engine.
on the side of the engine right above the oil filter, weather tight cap on it.
Not necessarily. If the oil filler cap wasn't on tight it could have just vibrated off. If the cap is not on the filler tube it will blow oil out of the tube with a good running engine. I would refill the oil, tighten the cap, clean up the oil spill and try the mower again to see what happens. Chances are everything will be fine.
It should say it on the oil cap.......5w30.