This seems to have a nice hot spark and I don't have a coil to try in it. If it needs a coil I'll probably just part it out...I seriously think it still needs a condenser..
I'm gonna put off working on ignition until my new condenser gets here. In the meantime I've made a set of blockoff plates for intake and exhaust, probably do a pressure/vacuum test next. Piston doesn't have stuck rings but has a little scuffing on it but has about 150 compression, guess that's enough. I probably will take piston out and check it closer, especially if it passes pressure test..I'll let you know how the pressure test goes. Am I right about the compression or is 150 a little low?
If you mean .018 to .023 maybe. .18 is way too wide for points. What I need next is the center out of an old flywheel to use to set the points more accurately. I imagine one from a 031 would probably work also. One other possibility is that this saw may have the wrong flywheel on it. You never know when you get a non-running saw what's been done to it..
Well, I converted three SEM and Bosch electronic ignitions to points on 041s this winter and they all worked flawlessly. I also set my points gap at .18 on all three, I believe that is what the shop manual calls for. Don't take my word, but I work on a lot of 041s and 051s. I wouldn't waste time with making block off plates, when rubber slid under the exhaust and intake will suffice. You can use a sphygmomonometer to pressure test the case. They commonly leak at the oil pump, oil adjustment knob as well as the worm, pto seal and mag seal along withthe entire intake.
That's kinda what I was hoping someone would mention, the probable air leak spots. I think wherever it is it is a big leak. I'll test it this week. The blockoff plates took about 10 minutes to build, no problem. They're kinda nice to put on the engine while I'm cleaning it. Not sure what I'm gonna do if the leak is at the pump, maybe new O rings? I'm pretty sure the intake was leaking, at least a little.
Sounds like you found the problem. I am not a big fan of 041 as far working on them but my first new Stihl was 041 Super and I really liked it and wish I still had it but like a dummy I left the side door open on my tool truck with the service body and drove off with the saw on the door. . I didn't realize till I got to town that the door was open and the saw slide off the door and into the ditch. I back tracked to find it and it was gone.
