Oil Recommendations; Spark Plug - MTD 31A-2M1A729 Operator's Manual

Oil Recommendations
When adding oil to the engine, refer to the viscosity chart
below (Fig. 7-2). Engine oil capacity is 600 ml (approx. 20
oz.). Do not over-fill. Use a 4-stroke, or an equivalent high
detergent, premium quality motor oil certified to meet or
exceed U.S. automobile manufacturer's requirements for service
classification SG, SF.Motor oils classified SG, SF will show this
designation on the container.
("F)-400-200 0o 200 400
("C) -30° -20° -I0 ° 0°
Figure 7-2
CAUTION:
DO NOT use non-detergent oil or
2-stroke engine oil. It could shorten the engine's
service life.
Spark Plug
_hll ARNING! DO NOT check for a spark with the
spark plug removed. DO NOT crank the engine with
the spark plug removed.
_ ARNING! If the engine has been running, the
muffler will be very hot. Be careful not to touch the
muffler.
To ensure proper engine operation, the spark plug must be
properly gapped and free of deposits.
1. Remove the spark plug boot and use a spark plug wrench
to remove the plug, Fig. 7-3.
!
/
J _ Spark Plug Boot
2.
Figure 7-3
Visually inspect the spark plug. Discard the spark plug if
there is any apparent wear, or if the insulator is cracked or
chipped. Clean the spark plug with a wire brush if it is to be
reused.
SECTION 7 -- ENGINE MAINTENANCE 17