How To Adjust a Chainsaw Carburetor

A well tuned chainsaw would have a perfectly fine carburetor even in high speed revving of its engine. One sign of a faulty chainsaw carburetor is that the engine would blow off too much smoke. And with time, the damage could progress and would decrease the lifespan of your chainsaw. Adjusting your chainsaw carburetor would be the best alternative to breathe in new life to your chainsaw. Here's how.

  • Remember that like any engine, chainsaws should be regularly checked to ensure good condition when used. Thoroughly check your user's manual and know your chainsaw engine's model number, specific manufacturer's settings and proper maintenance. Map out the carburetor model and have with you basic tools such as screwdrivers, wrench and a hex driver set.
  • Initially you need to be sure that the fuel of your chainsaw engine is only within half or two thirds of the fuel tank. It is said to be that less fuel the tank has greatly affects the adjustments done in your carburetor. Any adjustments to the carburetor would be more difficult if this step is not met.
  • Refer to your manual as to how to access the carburetor. Before you dismantle anything, be sure to be familiarized with every nut and bolt. Remember where each part is placed and how it looked like before. Place removed parts separately and according to the manner of removal.
  • Use an adjustable wrench and hex drivers fit to the nut of your chainsaw and remove the housing of the chainsaw. Have your screwdrivers and manual ready as you approach the carburetor. There are small screws near the engine that finely tunes the carburetor settings. See to it that you have the necessary adjustments by the book.
  • Place your chainsaw on a safe position as you are about to test the adjustments. Have your chainsaw engine started and let it warm up for 2 to 3 minutes. This allows your initial adjustments run through the engine.
  • Look for the idle adjustment screw in your manual and finely tune it. While turned on, the chainsaw may either rev more or suddenly drop in speed as you tune it. Temporarily place the idle a bit higher as you adjust other screws.
  • Next is to know the location for the adjustment screw for low speed. Determine the midpoint of the screw as this should be the level in which this specific screw should be placed.  To check the changes made slightly pull the chainsaw trigger and check the low speed settings.
  • After adjusting all the screws, slightly lower your idle screw and then have your chainsaw in full speed. The engine should run a smoothly in comparison before the changes made but it would still be a little edgy. The final touch is to adjust the last screw which is the full speed screw. When the fine tuning is set for this screw, you will notice that the chainsaw runs smoothly even at high speed.
  • Turn off the chainsaw and reinstall everything that was taken off. Place the housing back in its position and make sure every nut and bolt is in its original position. Now you can use your chainsaw like it was new again!


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