Stihl 028 - gas/oil residue out muffler

[abl1111]

Slowly but surely getting a Stihl 028 (44mm) back to life.

Runs well, but have not put under load yet. Run for maybe 10 -15 minutes since re-assemble...

What I've done:

- New rings put in, no gasket, squish at .020
- Compression at re-assembly at 160 'ish...

Carb set at stock settings.

Is it normal for me to be getting a heavy gas/oil residue on saw near muffler exhaust.

I was thinking it could be the rings have not set yet ?

What's the concensus ?

 

[oscar4883]

I'm sure someone better will chime in soon but for what its worth here is my 2 cents. It could be residual oil from the assembly process. Also, do you know the condition of the carb? Maybe it needs a re-build. Might be worth it to pull it apart and put a kit in it and check the metering height. I would put a new plug in it to rule that out and make sure you are burning the fuel you are getting. Good to see you have nice comp. It is mix coming out and not a bar oil combo I hope?

 

[striperswaper]

that 028 is trying to run under very dangerous conditions, the safest thing for you to do is send it to me as soon as you can contact UPS

 

[abl1111]

Oscar - not sure of the conditoin of the carb. It runs, idles and accelerates well... Hate to do anything more w/ the saw unless I have to - but if it needs it - I would do it. What is " metering height " ?


Striper - joke - right ?

 

[Rftreeman]

I just did my 394xp and it was doing the same thing but has since stopped, the only thing I can think is it's blowing out the oil I used to lube everything when I reassembled it..

 

[oscar4883]

Oscar - not sure of the conditoin of the carb. It runs, idles and accelerates well... Hate to do anything more w/ the saw unless I have to - but if it needs it - I would do it. What is " metering height " ?


Striper - joke - right ?

I would run it and see if it stops. Probably just assembly junk like has been pointed out already. Metering height helps control the amount of fuel. Search for carb rebuilding and read for hours. If it persists and you need a known good carb for testing I can send you a loaner.

 

[abl1111]

Thanks. Now I just need to find some wood to cut !

 

[mountainlake]

Any 2 stroke will do that when idleing for a long time, for sure if it's a tad rich. Stevew

 

[abl1111]

How can I set the carb so I know all is set right ? i.e. not too rich or too lean

 

[Dan_IN_MN]

How can I set the carb so I know all is set right ? i.e. not too rich or too lean

abl1111

What gas/oil ratio are you running?

As to adjusting the carb, do a search with the words:

four stroking, burble


You should find some info to keep you busy for a while.

Dan

 

[oscar4883]

Search for the Official Saw Tuning Thread and read it a couple times. For me the low end tuning is the hardest.

 

[mountainlake]

Thanks. Now I just need to find some wood to cut !

On the low after it's warm turn the low in a little at a time untill it wants to die when you pull the trigger then back out enough so accelerates good . Don't worry about the oily residue after idleing a long time, in normal use it will get hot enough to burn it off. Steve

 

[Footsie80]

Slowly but surely getting a Stihl 028 (44mm) back to life.

Runs well, but have not put under load yet. Run for maybe 10 -15 minutes since re-assemble...

What I've done:

- New rings put in, no gasket, squish at .020
- Compression at re-assembly at 160 'ish...

Carb set at stock settings.

Is it normal for me to be getting a heavy gas/oil residue on saw near muffler exhaust.

I was thinking it could be the rings have not set yet ?

What's the concensus ?

Old thread, I know. Any chance this resolved for you? I just rebuilt an 028, gasket delete, .025 squish and slight porting to match timing. Just idled it for 2 rounds of 15 minutes and blipped the throttle a few times. Pulled off exhaust to check cylinder and noticed residual gas/oil. I ran it a bit rich at first to get some lube in the bottom end and jug, but leaned it out. It’s a rebuilt carb and new rubber lines throughout. When I got the saw I noticed signs of oil on the dog side of the exhaust where it opens up, so I’m wondering if it’s just an idiosyncrasy of the 028. Cheers.