021/MS210 023/MS230 025/MS250 Oil Pump Repair (2 Viewers)

[D'Animal]

Yes

The Part # is 9134 381 1230.


Sorry for the delay.

 

[stihler]

Thanks for your help! I'll give it a try.

 

[Smiddyt]

D'Animal,

I was looking on google and you seem to be the Chainsaw expert. There is a little u shaped spring that connects the kill swith/ choke that I cant get back in. Is there some trick to replacing this?

 

[D'Animal]

The wire or the flat strap that the ground wire connects too?

 

[standfas]

Sorry to be dragging up such an old thread...However, I still got no oil after doing this things.

The polymer gear looks good and when turned by hand the gear on the oil pump turns. I blew out the tube from the tank to the elbow and blew out the elbow itself.

The only thing I can see that may be causing my problem is the drive sprocket. When I reassemble everything, the drive sprocket has a fairly sloppy fit. Sloppy enough that it doesn't seem likely the little coat hanger wire thing that wraps around the polymer gear would stay in the notch on the sprocket.

My question is...How snug should the fit be for the sprocket?

 

[standfas]

I think I may have answered my own question. I'm missing the needle cage. It wasn't there when I disassembled.

 

[D'Animal]

The end of the "wire" on the oiler drive gear may be worn down.

When you slide the sprocket on, can you see the wire potruding to the outside diameter of the sprocket drum?

 

[Harley68]

I have an issue with my 170 also. Won't pump oil very long and then blows bubbles. If you crack the cap and put it back on it flows good for awhile and back to bubbles. Removed the vent and cleaned but still same thing

 

[D'Animal]

I'm going to guess the O ring on the white elbow that connects the oil pick up hose to the bottom of the oil pump has a nick in it. It is allowing air into the system after the intial oil in the line is discharged.

I have an issue with my 170 also. Won't pump oil very long and then blows bubbles. If you crack the cap and put it back on it flows good for awhile and back to bubbles. Removed the vent and cleaned but still same thing