Click to download the
STIHL 4-MIX® Engine Check Worksheet
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The STIHL 4-MIX® Engine Check Worksheet is a simple guide to verify any faults
found in a logical and efficient manner.
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Worksheets are available for both 2-cycle and
4-MIX® engines
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An accurate repair cost estimate can then be prepared.
Throttle Operation
Verify that the throttle works smoothly, and that the
throttle interlock
is working correctly.
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The throttle cable should be adjusted so that the throttle is opening all the way to
the stop on the carburetor without causing excessive tension on the cable.
Example A.
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Be sure that the throttle returns to idle easily and smoothly.
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On a shaft mounted
4-MIX®
product, inspect the cable for fraying where it slides
over the plastic cam on the carburetor flange. Example B.
B
A
4180 Series – Throttle Adjustment Procedure
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To adjust the throttle correctly on a shaft mounted product, set the screw on the
adjuster cam that is located on the carburetor flange so the same amount of
threads show on either side of the cam.
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Next, using a small screwdriver, push down on the tab located in the top of the
throttle assembly and slide the tab towards the engine.
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Now squeeze the throttle to the wide open position. The tab will slide forward and
automatically adjust the throttle cable. Release the throttle trigger and verify that
the throttle lever comes back fully to idle.
