Attention: when operating in severe conditions, replace every 5000 km (or 3 months.).
1. Using a special wrench, loosen the oil filter (rotate counterclockwise).
2. Unscrew the filter by hand and remove it, holding the working side up so as not to spill oil.
3. Clean the mating surface on the cylinder block. Make sure there is no gasket residue from the old filter.
4. Apply some engine oil to the new filter gasket.
5. Screw the filter onto the seat by hand until there is considerable resistance.
6. Using a special wrench, tighten the filter an additional 3/4 turn.