064/056 mag11 build

[Deets066]

What type of muffler Jason? If it isn' t the carb, maybe the muffler? Or an intake boot sucking air? Or bad fuel line or fuel filter?

Believe he has tried two different boots

 

[Stihlbro]

So if it turns 17k you would be happy? Maybe I'm not under standing exactly what your after. If what you saying, the saw gained 200 rpm and is not four stroking then it is lean. It needs more fuel to perform and last.

 

[jmssaws]

My 064 did the same thing and I finally found a small airleak,and I mean exactly the same thing down to the exact rpm.
It's fixed but I can't find a airleak on the saw in the video,with a lot of air in it under water I can't find one.

 

[Stihlbro]

Run it till it's up to operating temperature. Pressure/vacuum test then. I've had intake boots, and the metal base gaskets (especially the 1122 and 1128 series ) leak when warm. Crank seals act the same.

 

[jmssaws]

So if it turns 17k you would be happy? Maybe I'm not under standing exactly what your after. If what you saying, the saw gained 200 rpm and is not four stroking then it is lean. It needs more fuel to perform and last.

I've built a couple hundred of them and they will tune around 14.5 so when one won't tune to stock settings there's something wrong.
Even when a saw goes lean you can still turn it some faster if you want to but this is 4stroking hard and will only go 200 rm faster.
The point of this is to figure out why that is.
The point of a ported saw is to make more power at a higher rpm which makes more chain speed hence faster cut speed so a ported saw that won't even tune to stock settings is a enormous flop or it has something wrong with it.

 

[Chris Zautner]

An ear is the best tool for tuning

 

[jmssaws]

An ear is the best tool for tuning

It's not a tuning problem,I have put several known good carbs on it.

The strange part is how fat it is at 13.3 which the way it's ported that's spot on,it should tune a thousand rpm faster but no matter what it will only gain 200 more.

Another thing is right after you start it it will 4 stroke up around 14k for a second.

 

[Time's Standing Stihl]

Does it make any difference with the air filter on or off?

Sent from my SM-G900R4 using Tapatalk

 

[jmssaws]

My tach is the fastest I've used and I think nla. Lol

 

[Adirondackstihl]

I know it's a video, but.....

In the beginning....its pig rich at 13.3....I can hear that.
But when you lean it out, it sounds at least 1k-2k faster to me.

Like I said....its tough listening through a phone.

 

[jmssaws]

Does it make any difference with the air filter on or off?

Sent from my SM-G900R4 using Tapatalk

Nope.
I'm convinced it has a airleak even if I haven't found it yet.

 

[Stihlbro]

I know it's a video, but.....

In the beginning....its pig rich at 13.3....I can hear that.
But when you lean it out, it sounds at least 1k-2k faster to me.

Like I said....its tough listening through a phone.

I heard the same thing.

 

[jmssaws]

I know it's a video, but.....

In the beginning....its pig rich at 13.3....I can hear that.
But when you lean it out, it sounds at least 1k-2k faster to me.

Like I said....its tough listening through a phone.

It never goes past 13.5
It's 13.3 and fat at 1 turn out then I turn it in a half turn and it's lean and done 200 rpm faster.
I can assure you it's only turning 13.5
I can start a different one that's 2k faster and there will be a giant difference between them.

 

[Stihlbro]

Give the saw more blow down.

 

[jmssaws]

It's screaming lean no doubt but it's at 13.5
I run and build the exact same model of saw 7 days a week and I can tell you pretty close without a tach how fast a 066 is running.
At 14.5 they sound like a bomb

 

[jmssaws]

My 064 did the same thing and I somehow fixed it and never had the cylinder off.
This particular saw was thinking way before i ground on it and that's why I changed the seals again.

 

[Chris Zautner]

It's not a tuning problem,I have put several known good carbs on it.

The strange part is how fat it is at 13.3 which the way it's ported that's spot on,it should tune a thousand rpm faster but no matter what it will only gain 200 more.

Another thing is right after you start it it will 4 stroke up around 14k for a second.

Agreed it's not your tuning, it's the saw

 

[Deets066]

An ear is the best tool for tuning

I think there is an underlying issue, not just tuning

 

[Deets066]

I think there is an underlying issue, not just tuning

Just saw the other posts

 

[jmssaws]

I think it's a crank seal that only leaks at high rpm.