Chainsaw Repair

Just going to do some real testing for myself.   Seen Joe H. Joe Dyno  do this on one of his saws.


I just cant stand the humpback look of the afm wedge deal and the 3d printed set up.   Joe tested this on a stock echo and it only showed 3% on stock one over the stock air filter.   But guys are saying they are seeing 10% on their ported ones. Going by cut times.


I'm not doing this because of fines getting by oem filter. Because I dont have a issue with that since installing a o-ring over 2 years ago.


I am going to test with cover on oem filter, then with cover off oem filter, then with the other oem echo set up installed. Just a good running hack ported 490 to be tested on.

All my 501 are kept stock.  Maybe try one of those later on.

IMHO if you dont have a issues with fines on stock air filter running the o-ring like I do. Not worth it to me.

Echo 490 that I took on trade years ago. It was hack ported no squish or base cut. Running stock air filter with oring.

Then running echo parts Joe showed using years back.
Total cost $30 shipped to me for the 3 oem echo parts.

I don’t have issues with fines for over 2 years now just by running the o-ring in stock

Retuned for next try. Noticed it had picked up rpm's before last test session with switch. The 490 500 dont like higher rpm's the way 501 4910 can compared to those.


Just trying the $30 set up for fun on my 490.
Might try on one of my higher revving 501’s later.
I ended up fattening it up a 1/4 turn on H side to bring it down some.
10.75 Down, 11 across. Was 1/4"+ down cut shorter then test day before.

But did get both on video.


Joe's dyno run to show what I am talking about.