I imagine the bevel was there before the coating was applied, and any port expansion inside the cylinder means the coating is ground off the bevel, and there seems to be a risk of the piston ring peeling the coating, because the bevel you cut when porting will have no nikasil on it. You MUST leave cylinder wall for the rign to ride on as it goes past the port window! I wouldn’t leave less than 1/8″. Remove the casting lines from the windows in the piston. Also angle them on the inside as I have shown in the 361BB porting thread. Don’t make the roof or floor of the ports too flat.
These are the exact steps I follow to wood ports my chainsaws and got 10%-25% power gain. One more thing to add, if you are a homeowner, you might never need to woods port your chainsaw. If you use your chainsaw for milling, read our guide on portable chainsaw mill and chainsaw mill attachment for getting the most out of your chainsaw.
how to port chainsaw cylinder Related Question:
What is Woods porting a chainsaw?
They typically include: opening up the muffler (by grinding, drilling, or adding factory port options), opening up the intake and exhaust ports (by grinding and polishing), lowering the jug by milling or using thin/no gasket to raise the compression (called squish), turning down the piston around the top edge to allow
Why is my chainsaw sputtering?
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.
Can a chainsaw run without a muffler?
A chainsaw will run perfectly without a muffler but using it without the muffler is not recommended for two main reasons. Firstly, the muffler reduces the noise made by the saw, and secondly, it provides protection to the cylinder by keeping debris from getting in.
How do you calculate a 2 stroke blowdown?
What really maters is the degrees between exhaust opening and transfers opening. This is called “blowdown” degrees. If the exhaust port opens at 90 degrees ATDC, and the transfers open at 115 degrees ATDC, then the blowdown is 115-90=25 degrees.
How do I adjust the carburetor on my Echo chainsaw?
Adjust the carburetor on your Echo chain saw. On the left side, near the starter rope, are an idle adjustment screw and two needle valve settings, marked “H” (for “high”) and “L” (for “low”). Turn the “H” needle counterclockwise to stop.
How do I know if my chainsaw spark plug is bad?
If it’s not producing any sparks at all, your chainsaw needs a new plug. If there are only a few sparks coming out of one side of the electrodes but none on the other side, it’s not bad enough for you to worry about, but it will affect your performance.
Why does my chainsaw dies when I give it throttle?
If the filter becomes clogged, not enough fuel will reach the engine for it to run properly. Because your chainsaw will idle, but dies when it is revved up to full power, it means that the filter is only partially clogged; it will allow enough fuel to the engine to run on idle, but not enough to sustain full throttle.
Why does my chainsaw bog out?
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.
What saw replaced the 346xp?
The 550xp is new model that replaced the 346xp bout 3 years ago.