BOMBARDIER 1980 Shop Manual page 161

SECTION 03
SUB-SECTION
04,
(CARBURETOR)
REMOVAL
Remove air silencer box, fuel inlet line and primer line.
Unscrew carburetor cover then pull out throttle slide ass'y
from carburetor.
. . , CAUTION: Exercise care when handling throttle
. " slide. Scratches incurred may cause throttle slide
to stick open in operation.
Untighten rubber flange clamp then remove carburetor
from engine.
CLEANING & INSPECTION
The entire carburetor should be cleaned with a general
solvent and dried with compressed air before disassembly.
Carburetor body and Jets should be cleaned in a carburetor
cleaner following manufacturer's instructions.
+
WARNING: Solvent with a low flash point such
as gasoline, naphtha, benzol, etc., should not be
used as they are flammable and explosive.
Check inlet needle tip condition. If worn. the Inlet needle
and seat must be replaced as a matched set.
Check throttle slide for wear. Replace as necessary.
DISASSEMBLY
&
ASSEMBLY
(2)Carburetor cover and throttle cable used in
1980
are
of the following type:
Throttle
cable
housing
"0" rlng-O
Carb top cover
_~
Cable housmg ,
retaining clip -
0®®@@Refer to Technical Data for exact calibra-
tion of carburetor.
0The position of the needle In the throttle slide is
adjustable by means of an "E" clip inserted into one
of 5 grooves located on the upper part of the needle.
Position 1 is the leanest. 5 the richest.
(MIKUNI CARBURETOR). PAGE 2
6DH4 - 2
Example:
Needle
identification
_---It
L
Position of the
"E" clip from top .
(!)The size of the throttle slide cut-away affects the fuel
mixture between 0 to
i
throttle opening. A certain amount
of richness is needed for that particular range because
this is where the transition from the low speed to the
high speed circuit takes place.
~
L
~HL
~I~=
High cut-away
LOWSW~Y~
rich mixture lean mixture
@The main Jet installed In the carburetor is suitable for
a wide range of temperature (-30 0 to 50 C/ -20 0 to
40 0
F)
at sea level. However. different jetting is available. Always
check spark plug tip color to find out correct jetting.
@@Correct fuel level in float chamber is vital toward
maximum engine efficiency. To check for correct level,
proceed as follows:
- Remove float chamber and gasket from carburetor.
- With carburetor chamber upside-down. measure
height between float chamber flange rib and top edge
of float arm.
- To adjust bend contact tab of float arm until a height
of 24 mm (.945") IS reached.
l~~V
'> _
24mm
o
(