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Re: chain oiler replacement
If it is Stihl 025 the chain oiler is on the bottom.First check if the worm gear(under the starter)is in good condition.Replace the starter(blocking the piston in the cilinder with a rope with many nods,that rope entering in the sparkplug hole).On the handle there are 4 screws on the right side (under 4 black plastic plugs,at the bottom 2 screws.)CUnlock them and take off the handle.At the bottom you can see the chain oiler( under the hose) the mark for right possition is there.Take off the oiler using a screw(lock clockwise into the oiler)and then pull it out.Clean with compressed air the oil hole.Put back together .Succes!
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Your clutch drum bearing has gone bad, letting the clutch drum to move around and cut into the oiler behind it, so now it just pumps the oil out that hole. You have to get that fixed to use the saw, otherwise you're going to cause catastrophic damage to the saw very soon.
To remove the oil pump you need the following:
Assembly tool 1123 890 2200 Removing oil pump
Puller 1130 893 1400
Installer 1130 893 1500
I would recommend trying to clean out the oiler first.
Please comment on this and tell us what type of oil you were using. There are rumors of wrong oil clogging or wearing the oilers. Was it used motor oil?
The oiler is set in place to a depth premeasured and tough to duplicate without the proper tool. If you use a proper sized bolt 5mm about 200mm long. After threading in till it stops mark the depth with a marker. pull the bolt out and the oiler will be on the end of the bolt.
thread the new oiler on and reverse the procedure.
My recommendation is to see a local service dealer like www.arcolawn.com and purchase the speciality tools: 21 Assembly tool 1123 890 2200 Removing oil pump 22 - Puller 1130 893 1400 23 - Installer 1130 893 1500
After saying all that I would tell you that a dull chain is the number one cause of "oiler problems" because a dull chain will over heat and make it seem as if the chain has no oil.
The oil pump is pressed in from the bottom. There is a special bolt and bracket to make sure the pump is set to the right depth. Your local dealer should bea able to get the tool for you but it will be cheaper to have the shop do the work.
PS it is more common on this saw to have a dull chain act like it is not getting enough oil than to have a bad oiler. I am gold certified and have been doing repairs since before the ms series. I have only replaced two oilers in that time.