Stihl MS 650, MS 660 Carburetor Removal and Refitting

Stihl MS 650 and MS 660 chainsaw carburetor removal and refitting guide will help with any carburetor cleaning, replacement, inspection and correct running of the chainsaw. A Service Manual detailing the Carburetor removal and refitting procedures, as well as more complete chainsaw repair information, is available to download. Also a Stihl MS650 and MS660 Parts List, Operator Manual, and carburetor manual are also available to view or download as a PDF which can be read on any device or printed.


Removing and Installing

The following servicing procedures show a carburetor without limiter caps. The procedures are exactly the same on carburetors with limiter caps.


    • Unscrew the nuts (arrows).
    • Pull off the flange (1).
    • Remove the filter base (arrow).

– Wash the filter mesh in the filter base thoroughly in a fresh, non- flammable cleaning solution and blow out with compressed air.

If filter mesh is damaged, install a new filter base.

Reassemble in the reverse sequence.

  • Remove filter base – b 12.1
  • Pull the grommet (1) off the adjusting screws and out of the housing.

– Open the throttle wide.

    • Hold the throttle shaft (1) steady (arrow).
    • Release the throttle trigger and take the rod (2) out of the throttle shaft.


MS 650, MS 660 Chainsaw with carburetor heating

      • Remove the baffle plate (1).
  • Pull the heating element off the studs.

All Chainsaws

  • Before fitting the carburetor, check that the sleeve (1) and washer (2) are in place.

    • Fit the grommet so that the tabs

(1) engage behind the inside of the housing.

  • On machines with carburetor heating, make sure that wiring is properly positioned – b 15.2
    • Pull the fuel hose (1) off the carburetor.


  • When pushing the carburetor into position, check that the impulse hose (1) is correctly seated.

  • Connect the fuel hose (2).
    • Remove the carburetor.

Reassemble in the reverse sequence.

  • Squeeze the throttle trigger and hook the rod (2) to the throttle shaft (1).

Stihl MS 650 and MS 660 Chainsaw Carburetor removal and refitting.

Works On Any Device

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