Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2014
0458-454-8621-F. VA0.J14. 
0000006507_003_GB
SR 430, SR 450
English
1
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This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process 
with electronic systems.
Contents
Allow only persons who fully understand 
this manual to operate your mistblower.
To receive maximum performance and 
satisfaction from your STIHL 
mistblower, it is important that you read, 
understand and follow the safety 
precautions and the operating and 
maintenance instructions in chapter 
"Safety Precautions and Working 
Techniques" before using your 
mistblower. For further information you 
can go to www.stihlusa.com.
Contact your STIHL dealer or the STIHL 
distributor for your area if you do not 
understand any of the instructions in this 
manual.
WARNING
Because a mistblower is a power tool for 
spraying chemicals, some special safety 
precautions must be observed as with 
any other power tool to reduce the risk of 
personal injury. Careless or improper 
use may cause serious or even fatal 
injury.
Guide to Using this Manual 2
Safety Precautions and Working 
Techniques 3
Assembling the Unit 14
Adjusting the Throttle Cable 17
Harness 17
Fuel 17
Fueling 18
Information Before You Start 20
Starting / Stopping the Engine 20
Operating Instructions 23
Calculating Required Quantity of 
Solution 23
Metering Unit 24
Dusting and Spreading Mode 26
Filling the Container 29
Working 30
After Finishing Work 30
Storing the Machine 31
Engine Management 32
Replacing the Air Filter 32
Adjusting the Carburetor 33
Spark Plug 34
Engine Running Behavior 35
Rewind Starter 35
Inspections and Maintenance by 
Dealer 35
Maintenance and Care 36
Main Parts 38
Specifications 40
Maintenance and Repairs 41
Disposal 41
STIHL Incorporated Federal 
Emission Control Warranty 
Statement 41
Trademarks 43