Oil Change

1. Change oil every 100 hours or 1 year whichever comes first.
   • Run the engine to warm oil.
   • be sure the engine (equipment) is on level surface.
   • Stop the engine.
   • Remove the oil drain plug and drain the oil into a suitable container while engine is warm.

Ariens recommendation: On the Mammoth 850 use a bungee to pull and hold the rubber drain hose outside of the frame to prevent oil mess.

WARNING: Hot engine oil can cause severe burns. Allow engine temperature to drop from hot to warm level before draining and handling oil.

2. Install the oil drain plug.

3. Oil Filter Change: Change the oil filter every 200 hours of operation.

WARNING: Hot engine oil can cause severe burns. Allow engine temperature to drop from hot to warm level before attempting to remove oil filter.

• Drain the engine oil into a suitable container.

NOTICE: Before removing the oil filter, place suitable pan under filter connection.

Ariens recommendation: On the Mammoth 850 place “suitable pan” below upper frame plate and above lower frame plate to prevent oil mess on lower frame plate.

4. Rotate the oil filter counterclockwise to remove it.
5. Coat a film of clean engine oil on the seal of the new filter.
6. Install new filter rotating it clockwise until the seal contacts the mounting surface. Then rotate the filter 2/3 turn more by hand.

7. Add engine oil as specified. (see FUEL AND OIL RECOMMENDATIONS in Engine Operator manual).
8. Remove the oil gauge (dipstick) and check the oil level (see PREPARATION chapter in the Engine Operator manual).
9. Run the engine for about 3 minutes, stop the engine, and check any oil leakage around the filter.
10. Add oil to compensate for oil level drop due to oil filter capacity (see PREPARATION chapter in Engine Operator manual.

WARNING: Engine oil is a toxic substance. Dispose of used oil properly. Contact your local authorities for approval disposal methods or possible recycling.