Husqvarna SMS4, Workshop Manual

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F4.4 Part. N. 8000 H4704 (07-2010)
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CARBURETTOR
8. Check:
• jet needle " 1 "
• main jet " 2 "
• needle jet support " 3 "
• idle jet "
4
"
• idle screw " 5 "
• needle jet " 6 "
Deformation/damage/wear Change
Obstruction Clean
Blow jets clean with compressed air.
9. Check:
• piston valve movement
Insert piston valve into carburettor body and move it up and
down.
Sealing Change piston valve.
10. Check:
• fuel hoses
Cracks/damage/wear Change.
Obstruction Clean.
Blow hoses clean with compressed air.
WARNING!
Before assembling the carburettor, wash all parts •
with a petroleum-base solvent.
Always use a new seal. •
CARBURETTOR ASSEMBLY
1. Measure:
• floater height " a "
Not conforming to specs Adjust.
Floater height (A.G.) 17.5 mm (0.69 in) •
a.
Hold carburettor upside-down.
b.
Measure the distance from float chamber front mating surface
(without seal) to floater top point.
• NOTE: Floater arm should rest onto needle valve without
shifting it down.
c.
If floater height does not comply with specifications, check the
needle valve.
d.
Replace, if worn out.
e.
If in good conditions, adjust floater height by bending the floater
tab " 1 " on floater.
f.
Check floater height again.
2. Install:
• floater " 1 "
• needle valve " 2 "
• floater pin " 3 "
NOTE: Install the floater pin in the direction shown by the
arrow.