290 oil pump

[woodsplitter3]

My Stihl MS 290 was leaking chain oil underneath the exhaust. I took the oiler apart and realized that the exit line on pump attaches to another line. I don’t know the name of it, but it has an o ring on it and it is what the exit oiler part connects to. The o ring and nipple are broken clean off. Is this repairable

 

[HarleyT]

No.

 

[Chevboy0167]

This...?

https://www.ebay.com/itm/3536195887...55eb66a:g:eIYAAOSwiP1hFEhC&LH_ItemCondition=3

 

[HarleyT]

I think he broke the nipple on the crankcase.

 

[Chevboy0167]

Ahhhh.... I see.

 

[woodsplitter3]

This...?

https://www.ebay.com/itm/3536195887...55eb66a:g:eIYAAOSwiP1hFEhC&LH_ItemCondition=3

I have that part. It attaches to another o ringed nipple that is broken off inside of the part you found. It appears that I have t replace the entire white molded plastic that covers the lover half of the saw. It looks like a difficult process. If you know of a good video to watch it would be greatly appreciated

 

[woodsplitter3]

I think he broke the nipple on the crankcase.

Yes. It appears I can replace the lower plastic part of the saw. Look like a complicated process. Any advice or video links would be greatly appreciate

 

[HarleyT]

It is a pain, but not too bad. Main problems a newby have: Removing the clutch and flywheel, and you have to remove the rear bar stud.

 

[Chevboy0167]

Yeah, I went through all this on a 290 refurb last summer. New tank assembly with 2 new bar studs. Was pain in the a** as you need to remove and replace everything in correct order to move on to the next step. A fun challenge for sure!

 

[woodsplitter3]

Thank you all. I have it all apart hopefully I can get it back together when I get the new parts. I took a lot of pictures as I went to help remember how.

 

[Chevboy0167]

Pics really helped me.... here is a side shot...

 

[a. palmer jr.]

I rebuild about 7 or 8 every year, not a bad process after you've done the first 50...just finished one two days ago, an MS390..

 

[cookies]

That class of saw is great 290, 311, 390. If well taken care of they just keep chugging along reliably every day for years and years, parts are damn cheap and plentiful with huge aftermarket support. Yea they are a pta if you think you are going to sneak a repair without tearing it all the way down and putting it back together in the correct order of steps. The 290 gets a lot of flack for being a slow cutter but damn if people don't put a 20" but will pull a 16" pretty darn good. When it gets tired or hard to start below 40f put a high quality 390 p/c kit on it and enjoy it all over again.

 

[a. palmer jr.]

I don't know why I get so many in that have pistons and cylinders that are so scarred up, it's like the owners of these 1127s don't know how to mix fuel or they try to run them with the H screw turned almost all the way in, trying to get 20k rpms out of them.