CS4116 – 16″ 41cc Consumer Gas Chain Saw

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

Piston Ring Size

The greatest numbers of rings are produced for automobile and light truck engines with diameter sizes ranging from 70mm to 100mm in diameter.

Piston ring size and configuration vary depending on engine design and cylinder material. Piston rings commonly used on small engines include the compression ring, wiper ring, and oil ring. A compression ring is the piston ring located in the ring groove closest to the piston head.
Hardened steel top rings perform so well that even automakers are using more of them these days in production engines for durability. Steel makes more sense if you`re planning boost, nitrous, or excessive amounts of compression because it tolerates the extremes better than iron.
Measure and record both the axial height and radial width of the oil ring assembly while off the piston. Using either a set of calipers or a micrometer is sufficient. After recording those measurements, perform the same axial height and radial width measurements of your compression ring(s).
Piston rings from Perkins come as three rings. They are the top compression ring, then the intermediate compression ring and finally the oil control ring. These parts are relatively small in size but play a large role in the main cylinder block of your engine.
Rings are a wear component that are usually replaced during a rebuild. The pistons may be reused if they are not damaged, cracked or scuffed and the ring grooves have minimal wear. But if the cylinders have to be bored to oversize to remove wear, replacing the original pistons with oversize pistons is a must.
Two main types of piston rings are used in combustion engines: compression rings and oil control rings.
Piston rings provide cylinder and combustion chamber sealing, which keeps heat energy contained where it belongs, above the piston. Any heat energy that escapes past the piston rings is lost power—period. Heat energy contained above the piston goes to work making power at the crankshaft.
If the ring gap is too large, it will allow an excess amount of blow-by through the gap, hurting that cylinder`s performance. In fact, getting the correct ring gap is so crucial and the tolerances so precise, that end gap is measured in each ring`s respective bore, to ensure the most accurate fit possible”.
More often than not, you will need to hone your cylinder when replacing the piston rings. That is because honing creates small crosshatches in the surface of the cylinder, to allow the wall of the component to retain oil and provide lubrication for the piston ring.
Each ring will also have a coating — this can help you determine the order the rings need to be put in. You don`t start an engine without lubrication, and you shouldn`t install your piston rings without proper lubrication either.
Piston sizes

The industry offers bore sizes of 0.020, 0.030, 0.040, and 0.060 inch. A standard bore is the dimension the engine was originally made to. If the cylinder is worn or damaged, it will first need to be overbored to a dimension and then finished honed to the final size to use a new piston.

The diameter of the piston, and the inside diameter of the cylinder, is called the bore – B. So the area A of the head of the piston is pi (3.14159) times the diameter squared divided by four.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Husqvarna 141 piston ring, what is the required gap for the ring? Also, does it matter which way the piston is positioned in the cylinder, there is no arrow or difference that I can tell by looking at it.
ANSWER : It’s been a few years but I’ve installed piston rings in many small engines. Many rings are beveled or rounded on the top outside to prevent excessive cylinder wear or scaring the cylinder wall. The bevel should be very slight and very hard so see. Some may have a small dot or marking cast into the ring near the end/split. If that is the case the ring should be installed with the marking turned toward the cylinderhead. Hint, lube the piston, rings, and cylinderwall before installing the piston. Gene

I was using the saw as a chain saw last weekend to cut up an old tree stump when the chain came off. I don’t know how to access it to put it back on and don’t have a user manual. The saw belonged to my late father and I don’t know if he even kept the manual.
ANSWER : You will have to remove the cover on the side the chain bar goes into. There should be one or two nuts holding the cover on the side. The is also a chain tension adjuster you may have to loosen to put it back on. Make note of the direction of the teeth on the chain. It is an directional chain. The tension adjuster is usually a flat head screw on the front side right beside the chain bar.Unless it is a really old saw, manuals are available from most manufacturers for free download. See if you can locate a brand name and model number.

How do i know when to replace the piston ring and what are the tell tales of having to replace it.
ANSWER : There is no specific sign that says it is time to replace piston rings that I know of. Some signs are drop in compression or power, harder to start, etc. But the same signs could be because of worn valve guides, build up of carbon between valve seat and valve, making the valve not seat properly leaving a small gap and dropping compression. Build up of carbon in the exhaust port could also be a problem making your saw not run right. You might have to take the engine apart and check piston ring gap also the ring might be seized stopping it from moving up and down to follow worn cylinder wall and lowering the compression. Cylinder wall wear could also be a problem. So there is no specific sign that I know of as I mentioned earlier. If you are having a problem with your saw there could be many different causes worn rings are just one. So unless knowing of a specific problem, the above is a general answer to your question about piston rings and what problems they could cause. I hope this helps you.

Saw will not run – Remington Electric Chain Saw
ANSWER : Could be a bad power cord, bad switch or bad brushes/springs in the motor. An AC voltmeter is helpful for tracking down these types of problems. Good luck!

Saw just stop working doesn’t come on check switch looks good. have move then one saw and 2 have just stop running after a while of cutting. Neither where over heated. I have 3 saws 16″ 14″ and pole is the switch the same in all three brfore I take the working one apart. Help.
ANSWER : Did you try them directly in the outlet or with a different extension cord? Have you checked the outlet for the correct power? Did you try a different outlet? Provide model numbers for the bad saws and I will provide an IPL with switch part numbers. Reply below.
Are you aware RemingtonPower is no longer in production?

Lost oil cap and bulb
ANSWER : Remmington’s parts department.

How to take out the piston in my chain saw – Echo CS400 18" Chain Saw
ANSWER : The cylinder must be removed from the crankcase (be sure to clean the exterior of the engine and all parts with compressed air first). That involves removing the carburetor, muffler, cylinder head, and possibly the entire outer case parts. If the piston/ring(s) requires replacement due to scuffing, the cylinder will likely need to be replaced also. Many modern engines use a chrome plated lining for the cylinder interior and any piston damage will affect the cylinder plating also. Use great care when installing the new piston in the cylinder as the ring(s) are quite fragile. Also look for direction marks on the piston as some engines use an offset pin. Be sure to lubricate everything as you go with saw oil to prevent start-up damage. Hope this helps!

ANSWER : Bar oil–home centers, Walmart, saw dealers.