Boatswain
ArboristSite Lurker
Hi all, I recently bit the bullet and installed a Little Red Barn POP-UP Echo CS-620P piston in my Echo CS-590 Timber wolf, along with a Walbro WT-216 and unlimited Oppama coil, after getting it dialed in it runs really good, I was unable to slip the clutch with a 20" bar with a full comp 7/32" Oregon PowerCut full chisel chain and the RPM's basically don't change in the cut. The saw hasn't been ran a lot but it's cut some pretty big wood in the short time the piston has been installed, anyway; I pulled the muffler & carburetor off and examined the piston, the intake side looks just like it did when I installed it, but the exhaust side has some mirroring in the center where the machine marks are already wearing away, no scoring or anything like that it's well lubricated and the compression (I don't have a gauge.) Is really strong and can almost hold the saw up by the pull cord and the rings aren't even worn in yet. I'm of the assumption that the piston is OEM'd by Golf and LRB has their name on it, the packaging is identical, the machine work looks identical as well, what I'm getting at is some people have said the aluminum in the Golf pistons is soft and wears in quicker and maybe that's it? or possibly it's slightly oblong? I don't think it's piston slap because I don't hear any funny ticking in it, it idles and burbles like it should, it could maybe be excessive heat blowback from the exhaust due to Echo's notorious muffler on this saw, it has been modded but not gutted. I really don't know what could be the issue, Regardless I'm going to run the saw till it coughs up it's guts, let me know what you guys have to say on this. After further inspection I've come to the conclusion of abrasive foreign material ingestion, some carbon probably got loose while I was putting it back together. Well I'm going to keep running it, maybe tear it down to clean the cylinder and hone it, and clean up or replace the piston.
