026 Surging, What Do You Think? Crank Seals? Carb Needs Cleaned? Or ?

[bulletpruf]

Seals come in the gasket set, good idea to install them on a rebuild. If I recall from others here, 026 is usually flywheel side that goes first.

Yep. I need to do a better job of installing seals when I freshen up a saw. It's come back to bite me a few times.

Thanks

 

[Joedangelo04]

Surging is seals all day iif you have done a recent carb kit.

 

[huskihl]

Check the choke flap. Run it without the air filter

 

[Wood Doctor]

I seldom have ever needed to change out the crank seals on the Stihl professional saws. The 025 and others in the residential line is a different story.

 

[Joedangelo04]

Idk, could be an intake leak too

 

[alexcagle]

Check your throttle shaft for any play.
I get carbs that surge that have a welch plug leaking a minute amount of extra fuel into the idle circuit.
The first thing I do on an older saw is check that the welch plug sealer hasn't detached, and isn't floating around interfering with the needle fulcrum action.
I seal them with jb weld liquid fast setting epoxy, after first spraying with lacquer thinner, then blowing compressed air on it to leave an oil free surface for the epoxy to adhere to.

 

[stihltech]

Do a pressure and vacuum test or at least spray some brake cleaner around seals, rubber parts, gaskets, etc. Fuel hose is ALWAYS checked for cracks. Crank seal under flywheel on half of that model I see.

 

[bulletpruf]

Purchased crank seals but haven't installed yet. I'm knee deep in a diesel dually rebuild (see signature for details). Will get back after it as firewood season approaches. Many thanks for all the input!