Husqvarna R135 Workshop Manual page 29

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28
Fuel system
Check the rubber connection on the
distance piece/heat shield for leakage.
Remove the screws (B) holding the heat
guard.
502 50 18-01
Dismantle and inspect the rubber con-
nection (A) for damage.
The holder for the air fi lter contains a
333/335 device that opens two air ducts in the
cylinder during acceleration. A rotary
valve connected to the throttle valve
lever opens the air supply in proportion
to the acceleration.
The device has the task of preventing
uncombusted fuel/air mixture from going
directly out into the exhaust channel.
The result is cleaner exhaust fumes and
more eff ective utilisation of the fuel.
Check the wear on the rotary valve (A)
and its bearing sleeve (B). Also make
sure that the sealing ring (C) is not
damaged.
Check that the rubber connection (A) on
the distance piece/heat shield does not
show signs of cracking or in any other
way leaks. Replace the connection if
this is the case.
Remove the screws (B) holding the heat
guard against the cylinder and pry off
the guard.
NOTE!
Do not lose the brass sleeves fi tted
in the guard.
Carefully dismantle the rubber connec-
tion (A) from the cylinder and check for
damage that can cause leakage.
Replace the connection if necessary.