BRP BOMBARDIER DS250 2006 Shop Manual page 135

Section 04 FUEL SYSTEM
Subsection 01 (CARBURETOR AND FUEL TANK)
Carburetor Adjustments
Float Level
Correct fuel level in float chamber is vital for maxi-
mum engine efficiency. To check for correct float
level proceed as follows:
– Remove carburetor.
– Turn the carburetor upside down and remove
float bowl.
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1. Float bowl screws
– Make sure that float arm is symmetric, not dis-
torted.
With carburetor chamber on the side:
– Measure height between bowl seat and the
top edge of float arm. Use float level gauge
(P/N 529 035 520).
– Keep float level gauge perfectly horizontal and
in line with main jet hole.
Ensure that both float level gauge tips are properly
positioned on carburetor body and that "L" arm is
leaning on float while compressing valve spring.
Refer to following photos for proper float level
gauge positioning.
116
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TYPICAL
1. Gauge tips
2. "L" arm
A. Height
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GAUGE ALIGNED WITH MAIN JET
To adjust height, bend the contact tab of float arm
until the specified height is reached.
CAUTION: When adjusting contact tab, do not
pry on. This would apply pressure on needle
and damage valve seat/needle.
CARBURETOR FLOAT LEVEL ADJUSTMENT
FLOAT LEVEL
Pilot Screw
Place vehicle on a level surface and apply parking
brake.
Turn the pilot screw clockwise until it sits lightly
then unscrew of 2 turns.
14.8 mm (.5827 in)
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