Stihl 009 oiler

[MnSam]

I picked this up off the local CL, it had been sitting quite awhile with a broken recoil spring. I'm having problems getting it to oil. I've cleaned the oil pump, the diaphragm and all parts look good. I run it and it seems to start oiling (weakly) but then stops. It seems to keep accumulating excess fuel behind the oiler pump diaphragm.

 

[MnSam]

Bump for the night owls, someone knows something about this oiler I'm sure.

 

[Stihldoc]

Wow, this takes me back a few years. As odd as it seems, check the exhaust firesafe screen for carbon blockage. The oiler on this saw is impulse driven and a clogged exhaust screen will screw with oiler output. The oilers on these saws are remarkably dependable and I rarely see a bamaged diaphragm or bad gasket. The output hose from the oiler to the bar mount plate may have degraded- it it is really stiff, replace it. These older orange 1120 saws aren't the smoothest running Stihls ever produced, but my son still uses my 012 that I got back in the mid 1980's. These reed valve Stihls have a maximum RPM of "only" 10,500, so don't try to tach it out like modern Stihl saws. These old 1120 series saws aren't fast, but they really last.

 

[MnSam]

Thanks for the input. Actually, I must have had an air lock. In my frustration I let it sit for a couple days. When I fired it up again it oiled very well, and continues to do so. I was going to sell it but thinking I may hang onto it for awhile. After it gets a new chain I'll have about $75 into it. It is in great condition, but not a huge profit to be had on it around here.