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Hi have a Stihl 420. Can you tell me where the two terminals connect to. I'm referring to the two that comes from the throttle handle to the coil area.
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I'm sorry, but I can't provide a visual diagram as I can't display images or diagrams. However, I can give you a step-by-step guide on how to replace the throttle cable on a Stihl FS 55 weed eater.
Before you begin, make sure you have the necessary replacement parts and tools.
Materials and Tools:
Replacement throttle cable
Screwdriver
Pliers
Allen wrench
Socket set
Procedure:
Safety First:
Ensure the weed eater is turned off, and the spark plug is disconnected to prevent accidental starts.
Remove the Air Filter Cover:
Locate the air filter cover on the weed eater's engine and remove it. Typically, this involves loosening screws or clips.
Access the Throttle Cable:
With the air filter cover removed, you should be able to see the carburetor and the throttle cable attached to it.
Disconnect the Throttle Cable:
Carefully disconnect the throttle cable from the carburetor. This might involve loosening a screw or bolt holding it in place. Note how it is routed and attached.
Remove the Handle Housing:
Locate the throttle trigger on the handle housing and remove it. This may involve unscrewing parts of the housing or loosening screws to access the cable.
Replace the Throttle Cable:
Feed the new throttle cable through the handle housing and reattach it to the throttle trigger. Make sure it's properly connected.
Reconnect at the Carburetor:
Reattach the other end of the throttle cable to the carburetor in the same manner it was originally connected.
Adjust the Cable Tension:
Adjust the cable tension to ensure it operates smoothly. There should be some slack when the trigger is released but no excessive play.
Reassemble the Weed Eater:
Reattach the air filter cover, making sure it's secure.
Connect the Spark Plug:
Reconnect the spark plug and ensure it's properly seated.
Test the Throttle:
With all the components reassembled, test the throttle to ensure it's working correctly.
Start the Weed Eater:
Reconnect the spark plug and start the weed eater. Verify that the throttle is responsive and functions as expected.
This is a general guideline for replacing the throttle cable on a Stihl FS 55 weed eater. Keep in mind that specific models may have variations in their design and components, so refer to the user manual or consult with a professional if you encounter any difficulties during the replacement process.
There are 2 ignition modules that fit that model. 4203 400 1301 and 4203 400 1301. Also check the ignition switch, remove earth cable from ignition module to double check that it isn't a dodgy earth lead. Ignition modules cost around 50 pounds + vat
replace the decompression valve. also check for carbon buildup on top of piston. usually when a saw stops on its own after 5 min or so.... the piston and jug are scored and need to be replaced.
On the Master Control Lever, you will notice a round reciever on the left side of the lever shaft. This holds the round terminal of the black wire in place. As the lever is rotated upward, the shaft brings the terminal of the black wire into contact with the flat brass spring (which belongs ON TOP of the lever shaft) and thereby stops the engine.
If the throttle trigger is pulled each time the lever is set to choke, this will never again be an issue. However, if the lever is pushed all the way down to choke and the throttle trigger isn't pulled, the linkage will malfunction again.
ALWAYS pull the throttle trigger before you set the choke.
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