Exmark metro 21 Operator's Manual page 18

expect to use in 30 days. Using unleaded gasoline results in fewer combustion
deposits and longer engine life.
NOTE: Do not add oil to the gasoline.
NOTE: Do not use methanol, gasoline containing methanol, gasohol containing
more the 10% ethanol, premium gasoline or white gas. Using these fuels can
damage the engine's fuel system.
NOTE: Do not use gasoline that has been stored since the last mowing season or
longer.
1. Clean around the fuel tank cap (Fig 5 & 6).
FUEL TANK CAP
DIPSTICK,
OIL FILL,
AND DRAIN
G1113
(Kawasaki Engines Only)
2. Remove the cap from the tank.
3. Fill the fuel tank with unleaded gasoline to within 1/4 to 1/2 inch (6 to 13 mm)
from the top of the tank. Do not fill into the filler neck.
NOTE: Do not fill the tank more than 1/4" (6 mm) from the top of the tank
because the gasoline must have room to expand.
4. Install the fuel tank cap and wipe up any spilled gasoline
FIGURE 5
(Honda Engines Only)
RECOIL STARTER
HANDLE
AIR CLEANER
MUFFLER
FIGURE 6
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SPARK PLUG