I’d recommend taking out all the spark plugs and saturating the inside of all the cylinders with Sea Foam Spray, letting it sit for 12-24 hours, and then turning the engine over by hand before putting the spark plugs back in and cranking it over with the engine starter. Would also definitely recommend draining out the fuel tank and adding fresh gasoline and Sea Foam Motor Treatment.
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I’d recommend taking out all the spark plugs and saturating the inside of all the cylinders with Sea Foam Spray, letting it sit for 12-24 hours, and then turning the engine over by hand before putting the spark plugs back in and cranking it over with the engine starter. Would also definitely recommend draining out the fuel tank and adding fresh gasoline and Sea Foam Motor Treatment.