Hi the drain plug is located underneath with a square drive the air filter, spark plug should be changed head removed and decoked carburettor removed cleaned and top cover should be remove and engine vents cleaned cables checked and adjusted, blade removed and sharpened and balanced hope this helps any problems or if you require any parts contact me via my website Quince www.swalelawnmowerandlandscapingservices.co.uk
quince
April 2008