Cleaning a carburetor on a chainsaw without removing it requires checking the fuel lines and filters, ensuring the chainsaw has enough fuel, using an air compressor to blow out any dirt or debris, and replacing the spark plug if needed.
1. Check the Fuel Lines and Filters: Start by making sure that the fuel lines and filters are clear of debris, dirt, or corrosion. Clean any buildup with a soft cloth and replace the fuel lines if necessary.
2. Have Enough Fuel: Make sure your chainsaw has plenty of fresh gasoline for optimal cleaning. About half a tank of fuel should be enough.
3. Use an Air Compressor: An air compressor can easily blow out any dirt or debris left in the carburetor. Use a long-nosed attachment and some compressed air to clean out any stubborn dirt.
4. Replace the Spark Plug: If the spark plug is old or damaged, it should be replaced. New spark plugs can help reduce any buildup and improve the performance of your chainsaw.
If done correctly and regularly, these simple steps can help keep your carburetor in good working order and prevent any costly repairs down the road.
What causes a Stihl chainsaw to bog down when accelerating?
Bogging down when accelerating a Stihl chainsaw can be due to a few different issues. First, the chain may be dull or damaged and in need of sharpening or replacement. Dull or damaged chains stick in the wood, create more friction and cause the saw to bog down.
Second, the spark plug gap may be set too wide, causing the spark to be weak and not ignite the fuel adequately. Third, the fuel/air mixture may be off because the air filter is clogged and/or the carburetor is dirty or out of adjustment.
Finally, the muffler may be blocked, restricting the engine’s exhaust and causing it to bog down during acceleration. To fix these issues, check the chain for sharpness and damage. Make sure the spark plug gap is set to the correct setting, clean the air filter, adjust and/or clean the carburetor, and clean the muffler.
How do you clean a Stihl ms170 carburetor?
Cleaning a Stihl MS170 carburetor can be a straightforward process. First, drain all fuel from the fuel tank. You can remove the MS170’s air filter, air filter housing and muffler. Take care to avoid contact with hot parts as they can be very hot after running the engine.
Locate the carburetor and use a flathead screwdriver to remove the two screws that secure the carburetor.
Next, remove the carburetor from the engine and carefully take it apart on a shop towel so that you don’t lose any screws or parts. Inspect all parts. The carburetor contains parts that cannot be re-used and typically need to be replaced including the needle, diaphragm, gaskets and filter.
Pay attention to the condition of the carburetor body and bowl, which should be clean. Clean any dirt or debris from the carburetor parts using a soft cloth and carburetor cleaning solution. Do not use abrasive material or harsh chemicals as these can cause damage.
Make sure all parts are completely dry before reassembling the carburetor. When mounting the carburetor back in its original location, you should fit any extra parts such as the gasket and filter. Tighten the screws, making sure not to over-tighten as this can damage the parts.
Finally, reattach the air filter, air filter housing and muffler. Once you have re-attached everything and added fresh fuel to the fuel tank, your Stihl MS170 should be ready to start.
Why does my chainsaw cut out when I rev it?
One of the more common causes is when there is a lack of fuel reaching the engine. This could be due to a blocked fuel line, clogged fuel filter, or empty fuel tank, all of which can cause a drop in fuel pressure and subsequent cutting out of the engine.
Other potential causes could be a clogged air filter, faulty spark plug, or worn or faulty carburettor, all of which could interfere with air and fuel intake and cause cutting out. Lastly, the chainsaw’s fuel mixture may also be incorrect for its current running conditions, leading to a drop in performance and stopping of the engine.
If none of these potential causes seem to be the problem, it is best to take the unit to a qualified chainsaw repair technician for further diagnosis and repairs.
Where do you spray carburetor cleaner?
You should spray carburetor cleaner directly into the intake manifold, throat of the carburetor, or the fuse box, depending on the setup of your engine. Make sure the engine is off and all electrical components, such as a spark plug, have been disconnected.
Before applying the cleaner, remove all external parts of the carburetor, like the air filter and air cleaner. Then, use a rag to wipe away any dirt or debris from the opening of the manifold or throat of the carburetor.
Spray the cleaner into the opening, being careful to avoid contact with skin or eyes. Let the cleaner sit for a few minutes and follow up with a few sprays of compressed air. Use an old toothbrush to scrub away the remaining dirt and debris.
How do you adjust the carburetor on a Stihl MS 170?
Adjusting the carburetor on a Stihl MS 170 is a relatively easy process. To begin, ensure that the chainsaw is cooled off and the spark plug disconnected. Insert the Phillips screwdriver into the idle speed screw (located next to the air filter) and turn the screw in a clockwise direction until the engine begins to idle.
Next, turn the low speed adjustment screw (located at the base of the carburetor) in a clockwise direction until the chainsaw speeding up slightly, and then turn the screw counterclockwise until the engine idles smoothly.
The high speed adjustment screw is located at the base of the carburetor and should be turned in a counterclockwise direction until the chain on the bar shows signs of movement. Then, turn the screw in a clockwise direction until the chainsaw is running smoothly and at maximum speed.
Finally, tighten any one of the other screws that have been adjusted, as the manufacturer recommends, to ensure the adjustments are secured and screws are tightened appropriately.
Always be cautious when adjusting the carburetor on a chainsaw, and be sure to follow the manufacturer’s instructions for use.
Can I put seafoam in my chainsaw?
No, it is not recommended that you put seafoam in your chainsaw. Seafoam is a fuel stabilizer additive and is normally used in fuel tanks in cars and lawn mowers. It is not compatible with the specialized lubrication that is used in chainsaws, which could cause damage and malfunction of the chainsaw.
Furthermore, it should not be used in 2-stroke engines as it could remove the needed lubrication from the cylinder walls and piston rings, leading to excessive wear. It is best to read the manuals for your specific make and model of chainsaw for more information on what type of fuel and additives to use.
How do you drain the gas out of a Stihl chainsaw?
Draining the gas from your Stihl chainsaw is an easy process, but it’s important to do correctly.
First, you’ll need to turn off the engine and disconnect the spark plug. Moving the saw away from any open flames or area with concentrated fumes is a good safety precaution. Then, locate the gas tank on the outside of the body and use an open end wrench to remove the nut that holds the fuel filler cap in place.
Once the nut has been removed, you can carefully lift the cap away from the tank and place it on a flat surface upside down. This will prevent liquid from running out from the cap. After that, you can use a flat head or Phillips screwdriver to carefully ease the tabs of the gasket loose.
When the gasket is loose, you can gently tilt the fuel tank forward and pour the gas into a platform-approved plastic container with a lid. Making sure the container is clearly labeled “Gasoline” so that no one mistakenly uses it for another purpose.
Once all of the gas is out of the tank, clean up any spilled liquid with a rag, and reinstall the gasket back in its original place. Replace the filler cap securely, then replace the spark plug and turn on the engine to make sure it runs properly.
How do you adjust H and L screws on a carburetor?
Adjusting the H and L screws on a carburetor involves different steps depending on the type of carburetor. If you have a Holley or Barry Grant-type carburetor, there will be two screws located just above the baseplate: one with a spring on it, known as the “H” screw, and the other which is knurled, known as the “L” screw.
The “H” screw is used to set the high idle speed, while the “L” screw is used to set the low idle speed.
When adjusting the screws, you want to get the engine to idle as low as possible without stalling out. Start with the “L” screw and gently turn it clockwise until the engine starts to idle higher. Then, adjust the H screw clockwise until the engine reaches the desired high idle speed.
Once this has been done, check the low idle speed to see if it has gone too high. If it has, turn the “L” screw counterclockwise to bring the idle back down.
Keep adjusting the screws until the desired idle speed is achieved. Generally, the best setting is when the low idle is slightly higher than the high idle. If the idle speed is still not very smooth, it could indicate an underlying problem with the carburetor.
In this case, it is best to seek professional help for further diagnosis and adjustments.
How do I reset my carburetor?
Resetting your carburetor can be a complicated process, depending on the type of carburetor you have. Start by ensuring the gas petcock is open so fuel can reach the carburetor. Next, access the exterior of the carburetor by removing the air cleaner cover, if it is present.
Make sure the throttle linkage is return to the idle position, and twist the idle speed screw until it stops. Place the throttle linkage back at the idle position, and start the engine. Adjust the idle speed screw to the correct RPM, based on your engine’s manual, and allow the engine to warm up.
Now you can start adjusting the carburetor components.
Find the mixture screws, which should both be set to the factory default settings according to the manual. If the settings are not provided, set them to 1 ½ turns out. Then, use a vacuum gauge to adjust the idle mixture; you should start with both mixture screws and adjust each to read the highest vacuum.
Once you have adjusted both mixture screws, you should be able to adjust the idle speed, if needed.
If your engine is a racing engine or you are simply trying to get maximum performance out of your engine, you may need to make further adjustments, such as timing and turn-down screws. Consult your owner’s manual or a professional mechanic for these more complicated adjustments.
When finished, reinstall the air cleaner cover and test the engine. With a little patience, you can reset your carburetor to ensure smooth performance.
What does H and L mean on Stihl chainsaw?
The letters “H” and “L” refer to the type of chain that is being used on a Stihl chainsaw. The “H” chain is an aggressive cutting chain that has more aggressive cutting teeth than the “L” chain. The “H” chain is meant for heavier cutting jobs and faster, more aggressive cutting.
The “L” chain is a standard cutting chain and is meant for more basic cutting jobs and is meant to cut more slowly and carefully. When selecting a chain for a Stihl chainsaw, it is important to make sure to select the right chain for the job at hand.
If the wrong chain is used, the performance and lifespan of the chainsaw will be affected.
How do you fix a chainsaw bog?
To fix a chainsaw bog, start by making sure it is properly lubricated with a high quality 2-cycle chainsaw oil. Check for buildup of sawdust or other debris in the air filter and clean if needed. Then, check the spark plug and replace or clean if necessary.
Make sure you are filling the fuel tank up to the designated fill line to ensure that the mixture of fuel and oil is properly balanced. Lastly, check the bar nuts are properly tightened and the chain is properly tensioned.
If the chainsaw still bogs, take it to a professional to have it serviced.
Why is my Stihl saw losing power?
Your Stihl saw may be losing power due to any number of reasons. The most common causes are related to maintenance and wear and tear, such as old or worn spark plugs, fuel and oil systems, and dirty or clogged air filters.
A spark plug that is old or has a broken ceramic insulator can cause your saw to lose power as it reduces the engine’s efficiency. You should always check your spark plug’s condition and replace it regularly.
Clogged or dirty air filters impair a saw’s ability to breathe and can lead to a decrease in power. Make sure the filter is clean and replace it if necessary.
Fuel systems can also affect your saw’s power. Make sure that the fuel you’re using has the right octane rating and that it’s not contaminated or stale. The same is true for your saw’s oil. Use the right type and weight of oil as specified by Stihl and keep it at the right level.
Lastly, make sure to regularly inspect your saw’s compression. If there’s any leakage then it’s time to get it serviced. Clogged carburetor jets, worn pistons, and malfunctions of the engine can all contribute to a decrease in power.
If all these maintenance and inspection techniques don’t help, then it’s best to take your Stihl saw to a professional for a deeper inspection.
Why does my Stihl chainsaw keep cutting out?
The most likely cause is an air leak in the carburetor or fuel system. This can be caused by a number of things, including a dirty air filter, a clogged fuel filter, a worn or cracked carburetor diaphragm, an incorrectly adjusted carburetor, or a vacuum leak.
Other possible causes include an old, dirty spark plug that is not igniting the fuel or a flooded engine due to excessive throttle or inadequate ventilation. Additionally, it is possible that the Stihl chainsaw needs a tune-up or the chain needs to be sharpened.
Therefore, to determine the specific cause of why your Stihl chainsaw keeps cutting out, it is important to inspect all of the components mentioned above. If the air filter is dirty, clean or replace it.
Check the fuel filter to make sure it is not clogged and replace it if it is. Ensure that the carburetor is adjusted properly and that there are no cracks in the diaphragm or other parts. Additionally, check the spark plug and replace or clean it as needed.
Finally, if the chain is dull, sharpen it for a smooth, clean cut.
How do I get more power out of my chainsaw?
Getting more power out of your chainsaw is a common goal. Generally, the best way to do this is to choose the right chainsaw for the job. Different sizes and types of chainsaws are designed to do different types of work and will provide you with different levels of power.
For example, professional chainsaws are designed to handle heavier jobs and are much stronger than hobbyist chainsaws. Furthermore, ensuring the chainsaw is properly cared for and maintained can also help ensure it is running optimally and getting the most power out of it.
Finally, the length and sharpness of the chain can affect the power of the saw. Chains that are too short or dull can cause the engine to work harder, resulting in it not reaching its full potential.
To make sure you’re getting the most out of your chainsaw, check the chain regularly and make sure it’s properly sharpened.