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Just repaired fuel line. To do so had to remove carb. Now when started all it does is runs at almost full throttle. all throttle linkages seem to be free with no binding. and not much change when adjust the throttle or idle settings. This is on a cs-400 echo
Make sure the carburetor was re-installed correctly as any air leak between the carburetor and cylinder will cause high engine speeds but almost no power. It can also scuff the piston/ring(s) and cylinder due to very lean lubrication from the fuel. Hope this helps!
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Typical for any carburetor is 1 1/4 to 1 1/2 turns (out). These are just rough settings to get the saw running. Remove chain, turn idle throttle speed screw in to increase idle rpms so its less likely to stall. Follow mfg instructions for starting.
Once running, adjust low speed mix and allow a couple minutes to warm. Then re-adjust low speed and lower idle rpms by turning out idle throttle speed screw. Then with throttle wide open adjust high speed mix. If saw hesitates from idle to full throttle, open low speed mix 1/8 turn and readjust high speed mix.
If saw doesn't fire in 3 or 4 pulls remove plug. If plug is dry no fuel, if wet either no spark or idle mix to rich (or fuel metering may be fouled).
Hi, My guess is that when you put the cable back in to the carb, It was not put in correctly. Thusly making the bike run high. There is a groove in the cable end and it must line up with a knotch on the carb.
After you do this you may have to reset the carb idle and fuel mix. Good Luck
Seems like you got a fuel pressure issue.Bogs down in 3rd. .Then idle high and low.Also check the MAP sensor its up along the firewall.Make sure the hose and electrical is connected,
DID YOU REMOVE ANY VACUUM LINES OR ANY THING NEAR THE THROTTLE LINKAGE AREA.OR DID YOU REMOVE ACCELERATOR LINKAGE MISROUTE IT CAUSE BINDING OR PULLING ON CABLE THIS WILL MAKE VECHICLE IDLE HIGH.
Anthony, this could be from the governer linkage which is intended for maintaining a specified top rotation per minute speed ( R.P.M ) is a possability im not sure of your specific adjustment procedure allthough most are a simple lossening of the linkage mounting to the shaft bolt while this bolt is loose you push the linkage to full throttle travel activation allowing the control linkage that was lossened to turn in its mount ( pivot) and keeping the threw the block mounting at full activation range ( travel ) in its farthest position re tighten the arms securing bolt,to secure it at its proper activation range ( at the pivoting point) I hope this helps if your unfamiliar with this type of governer control linkage, i would seek to locate a diagram on line that you can view to assist in your specific engine's linkage adjustment , and another possability is your carbuerator's High speed needle valve is to lean or to rich hope you analysis the problem Steve
Just adjust the idle speed control/Fuel air screw located pointing downward on the bowl of the carb,Just start the engine,idle up high and turn the screw until it levels out and runs smooth.
I would have your compression tested, if its a two stroke, and you can use tools with out breaking things or yourself, pour a cup of fuel down the left hand side of the carb and take the right hand side of the carb off and crank it like mad, if fuel leaks from there you better get to a repairer.
other wise the idle adjuster is usually on the left hand side where the accelerator linkages are, it will be a screw where the linkage touches when the throttle is closed. not too hard to find if you have a light source.
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