MTD 1850 - Manual (Page 12)

Step 4. a.Wash foam element in a solvent such as
kerosene or liquid detergent and wafer to
remove dirt.
b. Wrap foam in cloth and squeeze dry.
c. Saturate foam in engine oil, then squeeze
out excess oil.
NOTE
Belt tension is automatically main­
tained on the forward and reverse drive
belts by idlers. No adjustment is neces­
sary.
NOTE
Use the same oil for the air cleaner that
you use in the engine.
d. Assemble parts and fasten to the car­
buretor.
4-7. SPARK PLUG
The spark plug gap should be cleaned, and reset to
a 0.030-inch clearance every 25 hours of engine oper­
ation (see figure 4-4). Spark plug replacement is rec­
ommended
at the start of each tiller season; check
engine parts list for correct plug type.
FIGURE 4-4. SPARK PLUG
FIGURE 4-3. AIR CLEANER
4-5. CLEANING ENGINE AND TINE AREA
Any fuel or oil spilled on the tiller should be wiped
off promptly. Dirt, leaves and other debris must not be
left to accumulate around the cooling fins or the engine
or on any part of the tiller. Clean the under side of the
tine shield after each use. The dirt washs off the tine
easier if washed off immediately instead of after it
dries.
4-6. BELTS
Check that belts are free of oil or dirt. Wipe the belts
periodically with a clean rag.
4-8. GASOLINE FILTER AND SHUT-OFF VALVE.
Refer to Figure 4-5.
Step 1. Close the shut-off valve.
Step 2. Loosen the thumb screw below the bowl.
Step 3. Remove and clean the screen.
Step 4. Open the shut-off valve to see if gasoline
flows freely from the gasoline tank.
Step 5. Clean the bowl and screen. Use alcohol or
acetone to clean the parts if you find a gum­
my, varnish-like substance in the bowl.
Step 6. Reassemble.
Step 7. Open the shut-off valve.
4-2