Discussion for the Echo CS-3400 (Type 1E) Chainsaw
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Question: No Spark
EchoCS3400 1E , have changed coil, switch, lead wires set gap. still no spark. any suggestion will be appreciated.
Reply: No Spark
Hi jpf2666 This is a good one. Check the flywheel. Check it for WEAK magnets.- as magnets can lose their magnetism. Hold a small screwdriver about an inch away from them and see if there is any pull. Also, check the timing key on the flywheel. Those flywheels are cast aluminum and the steel crankshaft on the Echo wears the aluminum down somewhat over time. Check for any PLAY in the flywheel on the shaft. I have seen BAD flywheels on Echo machines before.
Question: High Low Carb Setings
I need to know the high and low carb seting for my chainsaw...
Reply: High Low Carb Setings
Start by turning the Hi and Low needles clockwise until they are lightly seated. Now turn the Lo speed needle counter clockwise 1-1/4 turns. Turn the Hi speed needle counter clockwise 1-1/2 turns. Turn the idle screw clockwise until it just contacts the throttle plate. Then turn clockwise an additional 3 turns.
Now the engine must be tuned. Start the engine and warm it up for 5 minutes, varying the throttle with 15 seconds of WOT followed by 5 seconds of Idle during this time. Using a tachometer find the WOT (Wide Open Throttle) speed. If it is above 11,500 RPM enrich the mixture by turning the Hi speed needle counter clockwise until the RPM is between 10,500 RPM and 11,500 RPM.
Now, with the saw at idle, turn the Low speed needle clockwise until maximum idle speed is found, just before lean drop off.
With maximum idle achieved turn the large idle screw clockwise until the idle RPM stabilizes at 4000 RPM. Once stable, back the large idle screw out until the tach reads 3000 RPM.
I hope this helps,