Saw builds

[RI Chevy]

Strong with that long bar too! Nice.

 

[Time's Standing Stihl]

Full comp baby!

 

[jmssaws]

 

[jmssaws]

I got a little sharper tune on the hybrid but the 066 is still just ahead

 

[jmssaws]

Even with the big carb the 056 is hungry after a long cut. Needs more pop off

 

[Toad22t]

I got a little sharper tune on the hybrid but the 066 is still just ahead

Did you ever add the other ring Jason?

 

[jmssaws]

Did you ever add the other ring Jason?

I did,it's just over 200lbs.
It needs a little more pop off pressure and I'm fixing that today.

 

[MustangMike]

For those of us who are ignorant, could you please define "pop off pressure", thanks!

 

[jmssaws]

For those of us who are ignorant, could you please define "pop off pressure", thanks!

Need to shim or find a longer metering spring to increase seat pressure.
If it pops at 20psi I need it at 23 to 25

 

[David Young]

Need to shim or find a longer metering spring to increase seat pressure.
If it pops at 20psi I need it at 23 to 25

And that gives it more fuel at idle?
Can you explain how it works?

 

[jmssaws]

And that gives it more fuel at idle?
Can you explain how it works?

I really don't know how it works but was told to do that and have a few times and it works.
I'm not very good with carbs

 

[Time's Standing Stihl]

I'm not very good with carbs

Don't feel like you are alone!

 

[MustangMike]

Thanks for that Jason.

I think it is the opposite guys, when that valve opens I believe it feeds the Hi speed jet.

That big cube saw is likely creating more vacuum.

 

[Chainsaw Jim]

I did,it's just over 200lbs.
It needs a little more pop off pressure and I'm fixing that today.

Hopefully that works. It sounded just like a problematic 562 coming out of the cut all loaded up like that.

 

[trooney]

I think it has to do with the pressure exerted on the diaphram and if it "pops "before a certain pressure is reached it floods the engine with fuel because not enough air is going through the carb to mix with it. Dont hold me to this though as I am just learning myself.

 

[Chainsaw Jim]

I think it has to do with the pressure exerted on the diaphram and if it "pops "before a certain pressure is reached it floods the engine with fuel because not enough air is going through the carb to mix with it. Dont hold me to this though as I am just learning myself.

You're on track.
The loading up or leaning up out of the cut like that is a sign of too much air to fuel. There are several ways to accomplish this...air leak from anywhere between the carb and cylinder gasket or transfer covers, bad fuel tank vent, line, or filter, improper carb adjustment, improper carb pop off as mentioned, bad carb kit, pinched fuel line, running out of fuel..

 

[huskihl]

And that gives it more fuel at idle?
Can you explain how it works?

Thanks for that Jason.

I think it is the opposite guys, when that valve opens I believe it feeds the Hi speed jet.

That big cube saw is likely creating more vacuum.

I wondered about this also. But someone posted the hows and whys in a thread a few days ago. Seemed legit at the time, but it goes against how I thought they worked.

One thing about it, it'll either get worse or better, and then we'll know hopefully. Pretty sure J will post his findings to get us squared away

 

[jmssaws]

I can tune it fatter on the low and stop it but then it 4 strokes in the wood, low side is very touchy and more seat pressure helps it lean out on the high and keep it from being hungry after a cut.
I think. Lol
I've had a few do it and it fixed everyone

 

[jmssaws]

These carbs are huge,the one on it tunes at a 1/4 to 1/8 out on the low and 2 to 3 out on the high.

 

[Toad22t]

will you guys please speak English! Carb's confuse me or maybe I just a special kind of stupid