McCulloch 96083000300, 433691, MC550 manual To Change Engine OIL See Fig, AIR Filter

MAINTENANCE

Disconnect spark plug wire before performing any maintenance (except carburetor adjustment) to prevent accidental starting of engine.

Prevent fires! Keep the engine free of grass, leaves, spilled oil, or fuel. Remove fuel from tank before tipping unit for maintenance. Clean muffler area of all grass, dirt, and debris.

Do not touch hot muffler or cylinder fins as contact may cause burns.

ENGINE

LUBRICATION

Use only high quality detergent oil rated with API service classification SG-SL. Select the oil’s SAE viscosity grade according to your expected temperature.

°F					°C
104					40
86					30
	SAE30	30-10W	5WSYNTHETIC30-	30-5W
68					20
50					10
32					0
14					-10
-4					-20
-22					-30

Fig. 12

NOTE: Although multi-viscosity oils (5W-30, 10W-30, etc.) improve starting in cold weather, these multi viscosity oils will result in increased oil consumption when used above 32°F (0°C). Check your engine oil level more frequently to avoid possible engine damage from running low on oil.

Change the oil after every 50 hours of operation or at least once a year if the tiller is not used for 50 hours in one year.

Check the crankcase oil level before starting the engine and after each eight (8) hours of continuous use. Add SAE 30 motor oil or equivalent. Tighten oil filler plug securely each time you check the oil level.

TO CHANGE ENGINE OIL (See Fig. 13)

NOTE: Before tipping tiller to drain oil, empty fuel tank by running engine until fuel tank is empty.

1.Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with plug.

2.Remove engine oil cap; lay aside on a clean surface.

CONTAINER

SPARK PLUG WIRE

Fig. 13

11

3.Tip tiller on its side as shown and drain oil into a suitable container. Rock tiller back and forth to remove any oil trapped inside of engine.

4.Wipe off any spilled oil from tiller or side of engine.

5.Slowly pour oil down the oil fill spout, stopping every few ounces to check the oil level with the dipstick.

6.Stop adding oil when you reach the FULL mark on the dipstick. Wait a minute to allow oil to settle.

7.Continue adding small amounts of oil, rechecking the dipstick until oil level settles at FULL. DO NOT over- fill, or engine will smoke heavily from the muffler on startup.

8.Always be sure to retighten oil dipstick before starting engine.

9.Reconnect spark plug wire to spark plug.

AIR FILTER

Your engine will not run properly and may be damaged by using a dirty air filter. Clean the element after every 25 hours of operation or every season. Replace the air filter every season. Service air cleaner more often under dusty conditions.

TO CLEAN AIR FILTER ELEMENT

1.Remove screw.

2.Remove air cleaner carefully to prevent dirt from enter- ing carburetor.

3.Take air cleaner apart and clean air filter element.

4.Wash filter element in liquid detergent and water.

5.Wrap filter element in cloth and squeeze dry.

6.Lightly coat filter element with clean engine oil. Squeeze in towel to remove excess oil. Do not saturate.

7.Reassemble parts and put back on carburetor.

ASSEMBLE ONE OF THESE

SCREWLOW POINTS TOWARDS NARROW EDGE OF ELEMENT

LIP	CUP BODY
	ELEMENT

ASSEMBLE SO LIP

EXTENDS OVER

EDGE OF AIR

CLEANER BODY

LIP WILL FORM

PROTECTIVE SEAL

WHEN COVER IS

ASSEMBLED

Fig. 14