Excessive carbon buildup

[Stirlinghart]

Ported 261C
Base gasket delete
Machined .015 off half the piston to create a domed piston keeping the exhaust and transfer numbers the same while gaining a few degrees on the intake.
Muffler opened up to 80% of exhaust opening

I’m getting a lot of excessive carbon buildup I assume from unburnt charge on the squished band as well as the top of the piston.

Am I gonna blow this saw up and is there something I can do to remedy this?

Also, does the wash pattern tell you guys some thing that I could be doing better?

Running Stihl premium two stroke at 45:1 with 94 octane pump, gas

 

[Squareground3691]

I would start will a different oil , than what ur using perhaps.

 

[Crzybowhntr]

I would start will a different oil , than what ur using perhaps.

What is the best oil?

 

[Squareground3691]

What is the best oil?

Ha , this can turn into a cluster F of an oil thread !! , I’ll let someone take the lead .

 

[Woodpecker]

Try an oil with a better detergent package like Amsoil Dominator or echo Red Armor.

 

[Crzybowhntr]

Ha , this can turn into a cluster F of an oil thread !! , I’ll let someone take the lead .

I was just being funny.

 

[Squareground3691]

I was just being funny.

I know, Lol

 

[Czed]

Stihl oil is the Chinese saw of the oil world.

 

[Stem]

try some Husqvarna XP+

 

[Nutball]

Try 25:1

 

[full chizel]

Try Astroglide

 

[Ford3000]

Ported 261C
Base gasket delete
Machined .015 off half the piston to create a domed piston keeping the exhaust and transfer numbers the same while gaining a few degrees on the intake.
Muffler opened up to 80% of exhaust opening

I’m getting a lot of excessive carbon buildup I assume from unburnt charge on the squished band as well as the top of the piston.

Am I gonna blow this saw up and is there something I can do to remedy this?

Also, does the wash pattern tell you guys some thing that I could be doing better?

Running Stihl premium two stroke at 45:1 with 94 octane pump, gas

Change the oil from stihl premium, or any stihl oil, use Husqvarna Xp+
or another good oil.

 

[Czed]

Ported 261C
Base gasket delete
Machined .015 off half the piston to create a domed piston keeping the exhaust and transfer numbers the same while gaining a few degrees on the intake.
Muffler opened up to 80% of exhaust opening

I’m getting a lot of excessive carbon buildup I assume from unburnt charge on the squished band as well as the top of the piston.

Am I gonna blow this saw up and is there something I can do to remedy this?

Also, does the wash pattern tell you guys some thing that I could be doing better?

Running Stihl premium two stroke at 45:1 with 94 octane pump, gas

Google what is the best 2 cycle oil
If you're lucky one or 2 answers will appear.

 

[dmb2613]

If you mix Stihl silver bottle with more oil than 50 to 1 it will carbon up.

 

[Nutball]

If you run your chainsaw, it will carbon up.

 

[Ford3000]

Google what is the best 2 cycle oil
If you're lucky one or 2 answers will appear.

After doing that he will need his head de-carboned, I had no idea
people could be so cruel.

 

[Steve]

After doing that he will need his head de-carboned, I had no idea
people could be so cruel.

Over oil of all things too!

 

[Ford3000]

Over oil of all things too!

Toxic subject is oil, lots of opinions, I used to enjoy
them, until I had to flush my head out just to think about
anything other than oil.
On a serious note, I have read that stihl oil does not burn well
nor does it lube well, leaves very dry bottom end.

 

[Steve]

Toxic subject is oil, lots of opinions, I used to enjoy
them, until I had to flush my head out just to think about
anything other than oil.
On a serious note, I have read that stihl oil does not burn well
nor does it lube well, leaves very dry bottom end.

Of the 10 or so oils I have personally used red armor leaves the most oil film in the crankcase. When I pulled the jug on my 372 running red armor the entire insides were red! I have a 4 stroke gasoline burning RC airplane that I use red armor in because of the film I found in that 372.

 

[Stirlinghart]

Of the 10 or so oils I have personally used red armor leaves the most oil film in the crankcase. When I pulled the jug on my 372 running red armor the entire insides were red! I have a 4 stroke gasoline burning RC airplane that I use red armor in because of the film I found in that 372.

What ratio?


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