RedMax HB280 Manuel D'instructions page 20

Spark plug
The spark plug condition is influenced by:
S Incorrect carburetor adjustment.
S An incorrect fuel mixture (too much or in-
correct type of oil).
S Poor quality gasoline and/or oil
S A dirty air filter.
These factors cause deposits on the spark
plug electrodes, which may result in operat-
ing problems and starting difficulties.
If the machine is low on power, difficult to
start or runs poorly at idle speed: always
check the spark plug first before taking
any further action. If the spark plug is dirty,
clean it and check that the electrode gap is
0.024" (0.6 mm). The spark plug should be
replaced after about a month in operation or
earlier if necessary.
0.024" (0.6 mm)
CAUTION! Always use the recommended
spark plug type! Use of the wrong spark
plug can damage the piston/cylinder.
Maintenance schedule
Below you will find some general mainte-
nance instructions.
Daily maintenance
S Clean the exterior surfaces of the blower.
S Check that the variable speed control and
the throttle trigger function in a safe man-
ner. Replace damaged parts.
S Check that the stop switch works proper-
ly. Replace if necessary.
S Clean the air filter. Replace if necessary.
S Check that the inlet cover can be locked
in the closed position. Carefully check
that the fan impeller is clean, especially if
the blower has been used for collecting
debris (vacuuming).
S Check that all nuts and screws are prop-
erly tightened.
S Check that all the housings are free of
cracks. Replace damaged parts.
S Check that the collection bag is intact and
that the zipper works. Replace it if neces-
sary.
545218616 Rev. 1 12/15/08
MAINTENANCE
Weekly maintenance
S Check the condition of the starter device,
the starter cord and the tensioning spring.
Replace damaged parts.
S Check the condition of the air intake at
the starter device. Remove debris if it is
clogged.
S Clean the outside of the spark plug. Re-
move it and check the electrode gap. Ad-
just the gap to 0.024" (0.6 mm), or
replace the spark plug. Use resistor spark
plug Champion RCJ- -8Y or equivalent.
S Clean the fan blades on the flywheel.
S Clean or replace the spark arresting
screen (not on mufflers with a catalytic
converter).
S Clean the carburetor area.
S Clean the air filter.
Monthly maintenance
S Clean the fuel tank.
S Clean the outside of the carburetor and
the area around it.
S Clean the fan blades on the flywheel and
the area around it.
S Check fuel lines for cracks or other dam-
age. Change if necessary.
S Change the fuel filter in fuel tank.
S Check all cables and connections. Re-
place damaged parts.
S Replace the spark plug. Use spark plug
Champion RCJ- -8Y or equivalent.
S Change the air filter.
Storage
Before storing the blower:
S Drain the fuel tank and push the primer
bulb until it becomes empty of fuel.
S Remove the spark plug and drop a
spoonful of 2- -cycle oil into the cylinder.
Crank the engine several times, then
install the spark plug.
S Store unit in a dry, dust free place, out of
the reach of children.
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