Fault Cause Remedy
Fuel line is blocked. ► Consult a STIHL specialist dealer.
Inferior, dirty or old fuel in tank. ► Use fresh, good-quality unleaded petrol.
Air filter dirty. ► Clean or replace air filter as described in engine
instruction manual.
Spark plug socket is detached
from spark plug or ignition lead
is not properly fastened to
socket.
► Connect spark plug socket.
► Check connection between ignition lead and plug.
Spark plug is dirty, damaged or
electrode gap is incorrect.
► Clean or replace spark plug.
► Adjust electrode gap.
Resistance at blade is too great. ► Set a higher cutting height.
► Start engine in lower grass.
Engine diffi‐
cult to start or
engine power
deteriorating.
Lawn mower housing is
blocked.
Clean lawn mower.
Cutting height is set too low or
rate of feed is too high.
Adapt cutting height or mow more slowly.
Water in fuel tank and carburet‐
tor or carburettor is blocked.
Empty fuel tank, clean fuel line and carburettor.
Fuel tank contaminated. Consult a STIHL specialist dealer.
Air filter dirty. Clean or replace air filter as described in engine
instruction manual.
Spark plug dirty. Clean or replace spark plug.
Engine over‐
heating.
Engine oil level is too low. Add or change engine oil as described in engine
instruction manual.
Cooling ribs dirty. Clean lawn mower.
Lawn mower
vibrates
excessively.
Blade is damaged. Replace blade.
Blade is not correctly attached. Attach blade.
Grass is not
being cut
cleanly.
Blade is blunt or worn. Sharpen or replace blade.
19 Specifications
19.1 Lawn Mower STIHL
RM 248.3 T, RM 253.3 T
–
Engine type: STIHL EVC 205
–
Displacement: 127 cc
–
Power (P): 1.8 kW (2.5 hp) at 2800 rpm
–
Speed (n): 2800 rpm
–
Maximum fuel tank capacity: 0.8 l
–
Weight (m):
–
RM 248.3 T : 32 kg
–
RM 253.3 T : 34 kg
–
Maximum grass catcher box capacity:
–
RM 248.3 T : 52 l
–
RM 253.3 T : 55 l
–
Cutting width:
–
RM 248.3 T : 46 cm
–
RM 253.3 T : 51 cm
19.2 Blade
–
Minimum thickness a: 1.6 mm
–
Minimum width b: 55 mm
–
Sharpening angle c: 30°
19 Specifications English
0478-111-9615-B 37
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