Husqvarna CR 65 2012 Workshop Manual page 145

Carburettor setting
Original setting
The carburettor original settings are: 500 m altitude above sea level, temperature
of nearly 20 °C, main use off-road and possibility of using premium grade fuel
in Central Europe (RON 95, without lead), mixed with 2T oil. Oil-fuel mixture
ratio at 3% during running-in phase, at 2% after running-in.
GENERAL RULE:
high altitudes or temperatures
low altitudes or temperatures
– USE ONLY PREMIUM GRADE FUEL (NO. 95), MIXED WITH 2T
HIGH QUALITY ENGINE OIL. OTHER TYPES OF FUEL CAN
CAUSE DAMAGES TO THE ENGINE.
– FEW OR LOW QUALITY OIL CAUSES EARLY WEAR OF THE
ENGINE AND, IN EXTREME CASES, IRREPARABLE DAMAGES.
TOO MUCH OIL CAUSES EXCESSIVE SMOKE AND SOILS THE
SPARK PLUG AND THE EXHAUST VALVE.
– TO GET A LEAN MIXTURE, CAREFULLY REDUCE THE JETS
STEP BY STEP BY ONE NUMBER RESPECTIVELY TO AVOID
PISTON OVERHEATING AND SEIZURE.
WARNING: If, despite the setting change, the engine does not work properly,
check for mechanical faults or problems in the ignition system.
Main information about carburettor wear
Because of the engine vibrations the throttle valve, the floater taper needle,
and the main nozzle are subject to high wear. Wear causes carburettor mal-
functions (for example too rich mixture). Check and/or replace such parts
every 100 operating hours.
Maximum jet
Minimum jet
Taper needle position
Air screw turns
FUEL SUPPLY
CR 65 2012
ð
lean mixture
ð
rich mixture
Carburettor settings
3 (from fully closed)
Summer
240
40
3rd notch
S.3
Winter
210
40
2nd notch
2 (from fully closed)
Workshop Manual Ed. 09-2011