BiodieselNC
ArboristSite Member
It’s not an issue for me to pull a 41cc engine with 175psi compression. I have an 066 and 084 as well. The problem with the FS250 is that the recoil assembly, size of string I can fit is small, so I was constantly breaking starter rope and/or handles. Thought about adding an elastostart handle but never did it.Wow, you want to add a decomp to a 40 cc motor? I have a 91 cc saw (660) that doesn't even have a decomp. (I've had nothing but problems with the decomp on my 361, so the hole on the 660 is plugged...and life is good.) Good luck, nonetheless...
By the way, to report back after almost 10 years since I did this work, the trimmer still fires up on 2nd pull (1st when hot) and runs like a scalded dog. Have not had a single issue with the decomp valve or porting that I did. Porting and high compression actually reduced the fuel consumption on this little machine, and I definitely use this one piece of equipment more than all my saws, blower, other stuff. It sees at least as many hours / season as my lawnmower.