Clogged idle transition ports

[Pioneer]

Had a Zama C1Q give me grief the other day with clogged idle transition ports. You could set it rich at idle and rich at high speed and it would still bog when you opened the throttle.
Disassembled the carb and soaked it in laquer thinner for a few days then blew out the idle circuit with compressed air. Back on the saw and no more problems.
It doesn't take much to clog those tiny holes, even though the carb looked clean inside, either something managed to make it's way in past the filters, or just over time it gummed up enough to cause issues even though the rest of the carb circuits were functioning properly.

 

[ZeroJunk]

Had a Zama C1Q give me grief the other day with clogged idle transition ports. You could set it rich at idle and rich at high speed and it would still bog when you opened the throttle.
Disassembled the carb and soaked it in laquer thinner for a few days then blew out the idle circuit with compressed air. Back on the saw and no more problems.
It doesn't take much to clog those tiny holes, even though the carb looked clean inside, either something managed to make it's way in past the filters, or just over time it gummed up enough to cause issues even though the rest of the carb circuits were functioning properly.

Yeah, and if you can get those welch plugs out you are better at it than me.

 

[SteveSr]

Had a Zama C1Q give me grief the other day with clogged idle transition ports. You could set it rich at idle and rich at high speed and it would still bog when you opened the throttle.
Disassembled the carb and soaked it in laquer thinner for a few days then blew out the idle circuit with compressed air. Back on the saw and no more problems.
It doesn't take much to clog those tiny holes, even though the carb looked clean inside, either something managed to make it's way in past the filters, or just over time it gummed up enough to cause issues even though the rest of the carb circuits were functioning properly.

Metal tag wires are good at cleaning these without having to remove the welch plug.

 

[SteveSr]

Yeah, and if you can get those welch plugs out you are better at it than me.

Getting them out is no problem it is getting them to seal when you put new ones back in!

 

[ZeroJunk]

Getting them out is no problem it is getting them to seal when you put new ones back in!

How do you go about it ?

 

[SteveSr]

How do you go about it ?

Carefully prick the center of the dome with a very sharp, slender awl and bend backwards. To seal I use a small bead of water thin cyanoacrylic super glue and let cure in a humid area for several days.

 

[stihltech]

Definitely try the tag wire first. In a shop setting, it may be more cost effective to replace the carburetor.