MTD BV3100 - Manual (Page 12)

MAINTENANCE AND REPAIR INSTRUCTIONS
GB12
0.020 in.
(0.5 mm.)
Fig. 26
REPLACING THE SPARK PLUG
Use a Champion RDJ7Y spark plug (or equivalent). The
correct air gap is 0.5 mm (0.020 in.). Remove the plug
after every 25 hours of operation and check its
condition.
1. Stop the engine and allow it to cool. Grasp the plug
wire firmly and pull the cap from the spark plug.
2. Clean dirt from around the spark plug. Remove the
spark plug from the cylinder head by turning a 5/8 in.
socket counterclockwise.
3. Replace cracked, fouled or dirty spark plug. Set the
air gap at 0.5 mm (0.020 in.) using a feeler gauge
(Fig. 26).
CLEANING THE UNIT
Use a small brush to clean off the outside of the unit and
to keep the air vents free of obstructions.
CLEANING THE VACUUM BAG
1. Empty the bag after each use to avoid deterioration
and obstructing air flow, which will reduce the
performance of the vacuum.
2. Wearing eye protection and a dust mask, clean the
bag as needed. Turn the bag inside out after initial
emptying and vigorously shake out dust and debris.
3. Wash the bag once a year or more often if needed:
a. Remove the vacuum bag.
b. Turn bag inside out.
c. Hang up.
d. Hose down thoroughly.
e. Hang to dry.
f. Turn bag right-side out and reinstall.
STORAGE
• Allow the engine to cool before storing.
• Store the unit locked up to prevent unauthorized use
or damage.
• Store the unit in a dry, well ventilated area.
• Store the unit out of the reach of children.
CLEANING AND STORAGE
4. Install a correctly gapped spark plug in the cylinder
head. Tighten by turning the 5/8 in. socket clockwise
until snug.
If using a torque wrench, torque to;
12.3-13.5 N•m (110-120 in.•lb.).
Do not over tighten.
LONG TERM STORAGE
If the unit will be stored for an extended time,
1. Drain all petrol from the petrol tank into a container.
Do not use petrol that has been stored for more than
60 days. Dispose of the old petrol in accordance to
local regulations.
2. Start the engine and allow it to run until it stalls.
This ensures that all petrol has been drained from
the carburettor.
3. Allow the engine to cool. Remove the spark plug and
put 30 ml. (1 oz.) of high quality motor oil into the
cylinder. Pull the starter rope slowly to distribute the
oil. Reinstall the spark plug.
NOTE: Remove the spark plug and drain all of the oil
from the cylinder before attempting to start the
blower/vacuum after storage.
4. Thoroughly clean the unit and inspect for any loose
or damaged parts. Repair or replace damaged parts
and tighten loose screws, nuts or bolts. The unit is
ready for storage.
TRANSPORTING
• Allow the engine to cool before transporting.
• Secure the unit while transporting.
• Drain the petrol tank before transporting.
• Tighten petrol cap before transporting.