The unofficial Mac 10-10 thread

[xl130]

Lots a weird stuff with this saw. Someone was definitely into this carb. The last rebuild had two diaphragms in it but they cut a flap out of the black one for some reason. Might explain why it wouldn’t run worth a darn.
I don’t know if the lid is warped or if there is something else wrong in the pump side. Leaking air through the impulse.

 

[fossil]

I’m honestly not sure how to read the model on these darn carbs...
Here are some pictures.

View attachment 871159View attachment 871160

Use the thin gasket for your SDC-37.

I'm not sure what you mean by air leaking through the impulse.

 

[xl130]

Use the thin gasket for your SDC-37.

I'm not sure what you mean by air leaking through the impulse.

You can see the air bubbles coming out of the port that connects to the crankcase impulse port. Also bubbles coming out of the atmosphere hole .

in my experience it’s usually a messed up diaphragm....

 

[fossil]

You can see the air bubbles coming out of the port that connects to the crankcase impulse port. Also bubbles coming out of the atmosphere hole .

in my experience it’s usually a messed up diaphragm....

View attachment 871165

Did you wet the diaphragms with mix before you did the test? If not the diaphragms and the metering needle have difficulty sealing when dry.

Once the fuel gets into the carb it should seal up. I rarely ever have issues with SDC carbs. If they are really old, a main nozzle check valve kit mat be in order.

 

[xl130]

Did you wet the diaphragms with mix before you did the test? If not the diaphragms and the metering needle have difficulty sealing when dry.

Once the fuel gets into the carb it should seal up. I rarely ever have issues with SDC carbs. If they are really old, a main nozzle check valve kit mat be in order.

Check valve kit has been changed. I happened to have one around for a rainy day. This carb seemed pretty rainy.

Both soft plugs changed. No leaks there luckily.

I swapped out the pump side cover with an SDC -1 carb that I have for a Homelite. That seems to have fixed the problem. The lid must have been warped.....?

 

[fossil]

Put it on the saw and get cranking.

 

[ozziechainsaw]

Hi Guys,

I finally got my 10-10S backing together today but I decided to remove the muffler and give everything a good clean and made sure there was no carbon build up. There was a little, but nothing the sand blaster didn't fix. But in taking the muffler apart I was very surprised to find it has 2 spark arrestors inside it. Is this normal or just something they decided to do here in Australia.

 

[heimannm]

The fine mesh screen was supplied to comply with U.S. Forest Service requirements for equipment used on Federal property. Most of the 10 Series would only have the perforated screen, others would have the fine mesh for use on Federal ground, but rarely would there be any reason to use both.

Mark

 

[ozziechainsaw]

Thanks Mark,

Would it be better if I removed them both or just leave them in the exhaust ?

Cheers
Justin

 

[Jethro 2t sniffer]

Thanks Mark,

Would it be better if I removed them both or just leave them in the exhaust ?

Cheers
Justin

Pull them out let that old girl sing her song

 

[mogulmasher]

Is at least remove the finer screen. It'll open it up quite a bit.

 

[ozziechainsaw]

Sounds like a good idea then .

I will let everyone know how it goes.

Cheers

 

[edisto]

Hadn't checked the stickies for a while, and was surprised to see a whole thread on 10-10s!

I picked this up at a thrift store for $12. It just needed fuel lines, a carb cleaning, and a new air filter. I was a little surprised by how loud it was! I don't normally wear hearing protection when tuning a saw...

 

[Jethro 2t sniffer]

Hadn't checked the stickies for a while, and was surprised to see a whole thread on 10-10s!

I picked this up at a thrift store for $12. It just needed fuel lines, a carb cleaning, and a new air filter. I was a little surprised by how loud it was! I don't normally wear hearing protection when tuning a saw...

View attachment 877435

You suck man. Haha

Yeah if a Mac is running muffs are a must really or thail be ringing for sure

 

[Maintenance supervisor]

Hadn't checked the stickies for a while, and was surprised to see a whole thread on 10-10s!

I picked this up at a thrift store for $12. It just needed fuel lines, a carb cleaning, and a new air filter. I was a little surprised by how loud it was! I don't normally wear hearing protection when tuning a saw...

View attachment 877435

That's a great find for 12$! Seems like the 10-10 was all over South Carolina, I'm in the upstate.

 

[Maintenance supervisor]

This is me poking the bee's nest.

 

[Maintenance supervisor]

This is the huge red oak knot that I cut last in the video.

 

[Goinwheelin]

This is me poking the bee's nest.

I like that. Let her eat!

 

[PogoInTheWoods]

Hell yeah.

 

[Goinwheelin]

Super sauce 10-10 recipes lol. Turns out it’s a screwdriver and a pile of wood