Echo CSG-7410 Operator's Manual page 26

Spark Plug
Spark plug
0.65 mm (0.026 in)
Replace Fuel Filter
Fuel Filter
CSG-7410
Spark plug lead
Fuel Tank Cap
1. Remove air cleaner cover.
2. Remove spark plug lead.
3. Remove spark plug.
4. The proper spark plug for this engine is NGK
BPMR7A. The firing gap between the electrodes
should be adjusted to 0.65 mm (0.026 in) before
use.
5. Install the spark plug. Proper tightness with a
cold engine is 17 to 19 N•m (170 to 190 kgf•cm).
6. Many failed plugs can be restored by filing or
scraping the electrodes down to bare metal,
cleaning all deposits off the porcelain insulation
around the centre electrode, then setting the
gap.
Fuel vapours are extremely flammable and
may cause fire and/or explosion. Never test
for ignition spark by grounding spark plug
near cylinder plug hole, otherwise serious
personal injury may result.
(Check Periodically)
1. Do not allow dust to enter fuel tank.
2. Clogged filter will cause difficulty in starting
engine or abnormalities in engine performance.
3. Pull the fuel filter out through fuel inlet port with
a piece of steel wire or the like.
4. When the filter is dirty, replace it. Do not attempt
to clean the filter.
5. When the inside of the fuel tank is dirty, rinsing
the tank out with petrol can clean it.
Check condition of fuel cap and gasket. Be
sure the cap fits tightly and there is no fuel
leak.
NOTE
Federal EPA regulations require all model year
2012 and later gasoline powered engines produced
for sale in the United States to be equipped with a
special low permeation fuel supply hose between
the carburetor and fuel tank. When servicing model
year 2012 and later equipment, only fuel supply
hoses certified by EPA can be used to replace
the original equipment supply hose. Fines up to
$37,500 may be enforced for using an un-certified
replacement part.
26
WARNING
WARNING