How do you check the compression on a Stihl
Stihl
Andreas Stihl AG & Company KG is a German manufacturer of chainsaws and other handheld power equipment including trimmers and blowers. Their headquarters are in Waiblingen, Baden-Württemberg, near Stuttgart, Germany. Stihl was founded in 1926 by Andreas Stihl, an important i…
How do you check the compression on a chainsaw?
First thing we check is compression by feel. Most 2 cycles need a minimum of 100psi to run, some will run with less, some won't. A quick check is to pick the saw up by the recoil handle, if the saw drops thru the compression stroke, it needs serious work. Next thing is to smell/look at fuel.
What should I do if my Stihl Chainsaw won’t start?
If the chainsaw engine dies when you release the throttle, turn the low-speed screw with a screwdriver clockwise until it stops and then turns it counterclockwise once. Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. Stihl chainsaw won’t start after refueling.
What is the choke position on a Stihl Chainsaw?
The Stihl chainsaw uses a four-position lever ignition system called the master control lever. The choke position is the fourth setting on the master control lever. When starting the motor when it’s col, you should engage the choke position to increase fuel intake and reduce air to allow the engine to start.
How do I know if my Chainsaw is bad?
A quick check is to pick the saw up by the recoil handle, if the saw drops thru the compression stroke, it needs serious work. Next thing is to smell/look at fuel.
How do you test chainsaw compression?
0:002:24how to do a COMPRESSION test on a chainsaw or 2 cycle engineYouTubeStart of suggested clipEnd of suggested clipIf you take it and hold it over the cylinder and whenever you crank it it should push your thumb offMoreIf you take it and hold it over the cylinder and whenever you crank it it should push your thumb off you shouldn't be able to hold your thumb there and that's in the range of about 80 to 140.
How much compression should my Stihl chainsaw have?
According to Stihl USA, the minimum compression reading for their chainsaws should be around 110 psi. Some individual engines may run a bit higher or lower and the temperature of the tool can affect readings.
How do I know if my chainsaw has low compression?
A simple way to check for low compression is to place the chainsaw on the ground and use the starter rope to lift it. Good compression will prevent the rope from pulling out. You should be able to carefully lift the weight of the chainsaw by the starting cord.
How do you check compression on a 2 stroke chainsaw?
1:043:36Compression Test on a 2 Stroke Craftsman Chainsaw - YouTubeYouTubeStart of suggested clipEnd of suggested clipBefore you turn the engine over to check the compression there's a there's a couple of things youMoreBefore you turn the engine over to check the compression there's a there's a couple of things you should do one is make sure your kill switch is in the opposition.
Why does my chainsaw have no compression?
Problems with the compression usually occur due to an air leak somewhere inside the internal engine, generally around the gaskets and seals of the crankshaft. If these parts are cracked or broken, the entire engine will need disassembling before the problem will get resolved.
What should the compression be on a Stihl ms170?
Re: Compression You should get a minimum of 125 psi if the engine is healthy.
How do you fix low compression?
0:023:22Fix Low Compression and/or Engine Noise for less $10.00 ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipOr anything like that going on in there this is what a stick to it's going to fill it in because allMoreOr anything like that going on in there this is what a stick to it's going to fill it in because all you have is a little metal ring that travels up and down remember Indus just an air pump.
How do you restore engine compression?
1:5410:03Did the "Engine Restore" Compression Improvement Last ...YouTubeStart of suggested clipEnd of suggested clipI was able to get a fairly close reading so the way this works is the compression tester actuallyMoreI was able to get a fairly close reading so the way this works is the compression tester actually screws into the top of the injector the injector is then inserted down into the regular position.
What causes a 2 stroke engine to lose compression?
Worn piston rings can cause incomplete sealing, resulting in lower compression and more difficulty in starting. Worn piston rings or reed valves that are no longer sealing properly may be the cause of the poor startability characteristic.
Should Throttle be open for compression test?
Almost every compression testing guide tells you to hold the engine's throttle wide open during a compression test, but most won't tell you why it may (or may not) matter.
What should compression be on a 2 stroke engine?
Pull the starter rope a few times to get an accurate compression reading. Normal compression is between 90 and 110 psi. Conclusion: You can follow the steps in this article to quickly diagnose all your two-cycle lawn equipment.
How do you increase compression on a 2 stroke?
Remove the cylinder head, under the head, sitting on top of the liner there should be some shims in the form of rings. There may be just one or several. Reducing the thickness of this shimstack will give higher compression. On an average sport type engine you will notice little if any difference.
How to check if a Stihl chainsaw is faulty?
Remove the ignition coil, test it using a multimeter or an ignition coil tester, and confirm your chainsaw model’s resistance specification. If the reading is below or above the required range, then your ignition coil requires changing. Most Stihl chainsaws have a resistance of 0.2-3.0 ohm on the primary coil and 5-20 kiloohm on the secondary coil but always confirm the correct reading for your model number.
Why won't my Stihl chainsaw start?
1. Bad fuel. If you recently refueled your Stihl chainsaw, stale gas can be a reason why it won’t start. Every time you fuel the chainsaw, you should make sure to drain the old fuel first to avoid contaminating the new fuel. You should also make sure the new gas you use is appropriate for the chainsaw.
Why does my chainsaw start and then stop?
Several reasons can cause your Stihl chainsaw to bog down when your pull the trigger . It can be from something as simple as starting the chainsaw wrongly to more severe issues like a damaged carburetor. Below we have discussed the most common reasons why your chainsaw won’t idle and the best way to fix it.
Why is my chainsaw engine flooded?
A flooded engine is when there is too much gas in the combustion chamber, usually due to repeatedly starting the chainsaw using the recoil system without the engine starting. When there is too much fuel, it will not ignite, and the engine won’t start. Flooding usually happens due to an underlying issue: a bad spark plug, bad gas, or a faulty carburetor. Other than damaged parts, using the choke position to start a warm saw often causes a flooded engine.
Why do chainsaws have chokes?
The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly . If you could start an engine with the choke closed and not turn off the choke on time, you will end up flooding the engine with too much gas. Follow the steps below on how to fix a flooded chainsaw engine.
How to stop a saw from starting again?
Check the saw’s exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. The vibration of the tool during use can run some fasteners loose, preventing it from starting again.
How to clean a chain brake lever?
Use a brush and cloth to clean and remove any dirt, mud, or debris that can interfere with the controls— clean around the chain brake lever, the air filter housing, and the filter. Wash the dirty filter with a non-abrasive detergent and water. Rinse the filter and allow it to air dry before reinstalling it.
How much compression does a chainsaw need?
If a chainsaw has a 2 stroke engine, then the maximum compression it requires is 110-130 PSI. Similarly a 4 stroke engine needs 2 times more compression than the 2 stroke engine that is around 180-210 PSI.
What is a compression gauge on a chainsaw?
A compression gauge is used to measure the compression of a chainsaw which works similar to the tire gauge.
What is the difference between a heavy duty chainsaw and a chainsaw with a smaller engine?
A heavy-duty chainsaw requires a large amount of compression whereas as a chainsaw with smaller engine needs less compression to convert fuel into energy.
Why does my chainsaw have high compression?
The other cause of your chainsaw’s high compression could be the stuck ignition rope. The starter assembly often fails to rotate due to a weak connection between the pulley and the ignition rope. Your ignition rope must be intact properly with the pulley to work correctly. Sometimes, the ignition rope is frayed or stuck inside the starter housing. Usually, this happens when you use a chainsaw after a very long time or by wear and tear of the rope. Keep in mind that the stuck ignition rope can also damaged other parts inside the starter assembly. So, replacing the ignition rope is a better option to keep everything working smoothly without any damage.
How much power does a chainsaw have?
A large engine has a huge capacity in its motor. It is obvious that the motor which has huge capacity will require more compression. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC.
Why is my chainsaw cord so hard to pull?
Most of the time, the chainsaw cord became hard to pull because of the Starter Housing. The Housing is the outer cover of the starter, and if it is damaged, your chainsaw suffers stiffness during a pull.
How to check starter spring?
It is effortless to check the starter spring; pull the ignition rope. If it is hard to pull, then check how the spring is performing. If you see any unusual movement of spring, then take it in to replace it.
