The last thing anyone wants is a saw that purrs when idling and bogs down when applying gas. This guide will explore some of the reasons why you chainsaw bogs down as well as the different ways to fix it. Before making adjustments to your carburetor’s high-speed screw which is highly discouraged by most chainsaw manufacturers you should clean the spark arrestor and air filter.
Fuel stabilizers are a must-have for any chainsaw owner who fancies leaving their equipment idle. Sparkplugs are a litmus test to the fuel economy of your chainsaw. Replacement of carburetor is the best option if you have an old chainsaw.
It’s absolutely frustrating when your chainsaw bogs down at high speed. As a result, the chainsaw bogs down at full throttle. Hopefully, in the end, you’ll be able to know the exact reasons on why the chainsaw bogs down.
chainsaw bogs when throttle Related Question:
Why does my chainsaw lose power when cutting?
The spark plug is designed to provide the spark that ignites fuel in your chainsaw’s combustion chamber. Over time, spark plugs can become weak, and will not provide an adequate spark. This will cause your chainsaw’s engine to lose power.
What causes engine bogging?
Check the Air Filter: The most common reason why an engine bogs out under acceleration is because the air/fuel mixture is ‘dirty’ or inefficient. If the air filter is clogged or has a lot of dirt in it, it could be bogging down the engine. Clean the air filter and see if the problem goes away.
Why is my chainsaw surging?
From my experience, surging is due to either lack of fuel, or lack of air. Make sure that the fuel isn’t air locked, or the filter plugged. Also, a dirty air filter is good to check, if you haven’t already.
What causes a chainsaw to bog down when accelerating?
The reason for that may be you’re using the saw at altitude or the carburetor adjustment has simply slipped. The saw also won’t operate well at speed if the air filter or spark arrestor or carburetor are dirty.
Why does my chainsaw stall when I give it gas?
Carburetor Adjustment An engine stalls when it’s getting too much or not enough fuel from the carburetor. Stihl chainsaw carburetors usually have three adjustment screws: one each for idle, low speed and high speed. If the saw stalls while it’s idling, adjusting the idle screw, which usually is marked LA, should help.
Why does my Stihl chainsaw loses power?
When your Stihl MS 170 chainsaw drops its power under full load, it generally means there is an improper mixture of fuel and air in your carburetor. When you depress the trigger, a vent on the carburetor opens, allowing more gas to reach the mixing chamber.
Why does my Poulan chainsaw dies when I give it gas?
The carburetor might be clogged. A clogged carburetor is often caused by leaving fuel in the chainsaw for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the chainsaw engine to stall.
Why does my chainsaw rev too high?
The throttle valve (butterfly) simply cuts off the supply of combustible air/fuel and the engine stops. If this adjustment is set too high, the high idle speed will cause the centrifugal clutch to engage and the chain will run. This is a dangerous condition and should never be allowed.
Why does my carburetor bog down when I accelerate?
The “Bog” simply means the engine is not receiving enough fuel when you go to wide open throttle. While there are other issues that may cause similar reactions within the carburetor, often the problem can be traced back to the accelerator pump system. Incorrect adjustment is the typical culprit.
What can cause hesitation when accelerating?
An engine that is hesitating to accelerate is most likely dealing with a fuel/air mixture that is too lean. Engine’s that are running inefficiently will begin to show signs like hesitation which will only become worse over time.
What does a spark arrestor do on a chainsaw?
The spark arrestor on your chainsaw prevents dangerous hot sparks from igniting fires while you’re working. If the arrestor is clogged or dirty, however, it will also prevent exhaust from leaving the motor, which can prevent it from running.
Why does my chainsaw only run with the choke on?
When your chainsaw only runs if the choke is on the problem, in most cases, is a result of fuel supply problems or a faulty carburetor. To fix the problem you should check and clean the fuel system and carburator.
How do you adjust a Stihl carburetor?
Turn the H screw clockwise with a carburetor adjustment tool until the head is spinning as fast as it will go, then back off the screw carefully until the RPMs start to decrease. Turn the screw slowly clockwise again until the engine once again just starts to pick up speed.
What is the carburetor adjustment on a Poulan chainsaw?
Other Poulan Chainsaw Carburetor Adjustments A basic procedure is to start the saw, turn the screw clockwise until the engine begins to stall for lack of fuel, then back the screw off until the engine stalls because it has too much fuel. The ideal setting should be midway between these points.
How do you clean the carburetor on a chainsaw?
Let the chainsaw run at low RPMs/idle for a while. This is to let the cleaner run through the carburetor, the fuel lines, and the idle engine. The cleaner will wipe remove the gummy residue blocking the components to create a clean passageway for the air and fuel. As the RPMs begin to increase, turn down the idle knob.