Mi-T-M GEN-3500-iMM1, Operator'S Manual

22  

Operator’s Manual

SERVICE

5. Replace the element in the air filter unit.
6. Replace the air filter cover and rotate knob clockwise to 

secure.

NOTE: Make sure the filter is seated properly inside the 

generator. Installing the filter incorrectly will allow dirt 

to enter the engine, causing rapid engine wear.

CHANGING ENGINE OIL

For best performance, engine lubricant should be changed 

after every 100 hours or 6 months of operation.

1. Remove the oil fill cap/dipstick.
2. Unscrew the oil drain plug and remove.

3. Allow lubricant to drain completely into an approved 

container.

NOTE: Drain the lubricant while the engine is still warm 

but not hot. Warm lubricant will drain quickly and more 

completely.

WARNING: DO NOT CHANGE ENGINE LUBRICANT 

WHILE IT IS HOT. ACCIDENTAL CONTACT WITH 

HOT ENGINE LUBRICANT COULD RESULT IN 

SERIOUS BURNS.

4. Reinstall the oil drain plug and tighten securely.

5. Refill with lubricant following the instructions in the Checking/

Adding Lubricant section. For amount of lubricant needed 

to refill, see Product Specifications earlier in this manual 

or the accompanying engine manual, if applicable.

6. Replace and secure the oil cap/dipstick.

NOTE: Used lubricant should be disposed of at an ap

-

proved disposal site. See your local retailer for more 

information.

SPARK PLUG 

The spark plug must be properly gapped and free of depos-
its in order to ensure proper engine operation. To check:

1. Remove the spark plug cap.
2. Clean any dirt from around base of spark plug.

3. Remove spark plug using spark plug wrench or socket.
4.  Inspect spark plug for damage, and clean with a wire brush 

before reinstalling. If insulator is cracked or chipped, spark 

plug should be replaced. For replacement spark plug, 

see  Product  Specifications  earlier  in  this  manual  or  the 

accompanying engine manual, if applicable.

5. Measure plug gap. The correct gap is 0.024−0.028 in. (0.60-

0.70 mm). To widen gap, if necessary, carefully bend the 

ground (top) electrode. To lessen gap, gently tap ground 

electrode on a hard surface.

6. Seat spark plug in position; thread in by hand to prevent 

cross-threading.

7. Tighten with wrench to compress washer. If spark plug is 

new, use 1/2 turn to compress washer appropriate amount. 

If  reusing  old  spark  plug,  use  1/8  to  1/4  turn  for  proper 

washer compression.