Chainsaw compression. How to check for compression of a piston #compression #chainsaw #pistons

Chainsaw compression. In this video, we'll be demonstrating how to check the compression of a piston in a chainsaw using a compression tester. Checking the compression is an important part of regular maintenance for your chainsaw, as it can give you an indication of the overall health of the engine and help you diagnose any potential problems before they become more serious.

To get started, you'll need a compression tester that's compatible with your chainsaw's engine. These can typically be purchased at your local hardware or automotive store. You'll also need a wrench or socket set to remove the spark plug from the engine.

Step 1: Remove the Spark Plug To check the compression of your chainsaw's piston, you'll first need to remove the spark plug from the engine. Use your wrench or socket set to loosen and remove the spark plug from the engine.

Step 2: Install the Compression Tester Next, install the compression tester into the spark plug hole. Make sure that the tester is securely screwed into place, as any leaks can affect the accuracy of the reading.

Step 3: Pull the Starter Cord Once the compression tester is installed, pull the starter cord to turn over the engine. You'll want to do this a few times to get an accurate reading.

Step 4: Check the Reading After turning over the engine, check the reading on the compression tester. This will give you a measurement of the amount of pressure that the piston is producing when it compresses the air/fuel mixture in the engine.

The exact compression range that you're looking for will depend on your specific chainsaw model, so be sure to consult your owner's manual or the manufacturer's specifications. In general, though, you'll want to see a reading between 90-120 psi for a healthy engine.

Step 5: Interpret the Results If your chainsaw's compression falls within the recommended range, then your engine is likely in good shape. However, if the compression is too low, then it could be an indication of worn or damaged piston rings, a blown head gasket, or other problems that require further investigation.

Overall, checking the compression of your chainsaw's piston is a relatively simple process that can provide valuable insight into the health of your engine. By following these steps, you can quickly and easily check your chainsaw's compression and keep your equipment running smoothly for years to come.

. How I check the compression of a piston. This saw was very good at 120 psi. 100psi is good anything below that is up to the person to decide if any good for them. Some small engine people will not even work on a saw that's below 100 psi but others say the cut off point is 90psi so tomato tamoto. There are many videos out there on this subject but this is mine.
The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi.
This poulan pro 42108a is about 9 or so years old and cut about 72 cord of wood and is still going strong. Check out my video on this saw its one of my first videos but its honest enough review, here is the link https://youtu.be/AHO7Loh_BHw