Stihl 038 Magnum smoking after cutting?

[CrystalRiver1]

Hey guys took my 038Mag out and did some cutting today.
It did a great job with plenty of power, yet after about 15 minutes of cutting and shutting it off and sitting it down...it started smoking slightly from beneath the top cover where the cylinder is.
Never stopped performing or anything...but it did this every-time.
Any ideas or experiences with this?

 

[huskihl]

Probably bar oil residue on the cooling fins. Or maybe the case gasket is seeping bar oil up through underneath the muffler

 

[Kevin White]

Could be that your saw is running a touch leaner than it wants to. In my experience, I would dial the H screw out to richer about 1/8th of a turn and see if it does it. Your carb diaphragm may have changed slightly from just age and use, but only changed enough to make a slight difference in the saw. That's my guess. Try and richen it and see what happens. Couldn't do any harm but it may if it gets any leaner.

 

[Brewz]

I just rebuilt 2 x 038's and both of them have a small section on the bar cover that allows bar oil to make its way strait onto the cylinder.

 

[Landmark]

Whens the last time its been cleaned really good. If its been a while i would do that and ck it the next time it smokes again. Easier to find then imo

 

[Majorpayne]

Quit putting oil in your gas will stop it.

 

[maulhead]

I've been known to smoke after cutting,,,

 

[CrystalRiver1]

Quit putting oil in your gas will stop it.

 

[CrystalRiver1]

I just rebuilt 2 x 038's and both of them have a small section on the bar cover that allows bar oil to make its way strait onto the cylinder.

Do they smoke after running?

 

[Brewz]

Do they smoke after running?

No
They are both rebuilds and are clean as a whistle

 

[Duane(Pa)]

All of these things are getting some age to them. Is your saw nasty dirty or reasonably clean? When a saw leans out (for any number of reasons) cylinder temps will shoot up dramatically. You may have something like that going on, or it could just be some oily residue in a hot area...

 

[Kevin White]

To deep clean it, pour exactly 432ml of gasoline on top of the cylinder. Spin it around three times and light a match on top. Gets rid of any bad spirits and burnt on sludge. May or may not need new plastics depending on if you care about looks.

 

[TJ the Chainsaw Mechanic]

I wouldn't worry about it. You could pull the spark plug and if it's black your running to rich on the top end. That with cause it to smoke a bit. Also running to rich on the low end will cause it to smoke. It's a 2 stroke running on oiled down fuel. Gonna smoke a little. Get yourself a 2 stroke quad and run that for awhile. After you run it you'll think your saw runs like an electric prius. LOL!

 

[Duane(Pa)]

He's not talking about exhaust...

 

[TJ the Chainsaw Mechanic]

He's not talking about exhaust...

Coffee hadn't kicked in yet.

 

[Chainsaw Jim]

Could be a leaky exhaust gasket letting unburned blackish mix oil seep or spray out onto the cylinder.

 

[jakethesnake]

Likely just gunk on coolant fins mine have done it when I was working one hard Likely a non issue Wouldn't over think it much. Long as she's running right