Stihl SR 430 User Manual

12 SR 430, SR 450
3.4 Carburetor
Condition Cause Remedy
Carburetor floods
– engine stalls
Inlet needle not sealing
– Foreign matter between valve
seat and sealing cone or sealing
cone worn
Remove and clean the inlet needle,
clean the carburetor
Inlet control lever sticking on
spindle
Clean the inlet control lever or
replace if necessary.
Helical spring not located on nipple
of inlet control lever
Remove the inlet control lever and
refit it correctly
Perforated disc on metering
diaphragm is deformed and
presses constantly against the inlet
control lever
Fit a new metering diaphragm
Poor acceleration Setting of low speed screw (L) too
lean
Check basic carburetor setting,
correct if necessary
Setting of high speed screw (H) too
lean
Check basic carburetor setting,
correct if necessary
Inlet needle sticking to valve seat Remove inlet needle, clean and
refit
Diaphragm gasket leaking Fit new diaphragm gasket
Metering diaphragm damaged or
shrunk
Fit a new metering diaphragm
Spacer flange damaged Install new spacer flange

Stihl SR 430 Specifications

General

Product type	Backpack garden sprayer
Product color	Black, Orange, White
Tank capacity	14 L

Weight and Dimensions

Weight	12200 g