028 super woes!

[Okie294life]

I’m working on my 028 super, it has trouble keeping idle making, squeaking noise. I’ve readjusted the LA screw several times in attempt to get it to idle right, have the jets set correctly. It will cut strong and revs strong, but at idle it’s making a squeaking and has trouble running. I’ve checked the crank and there seems to be no play. Haven’t done a leak test. Here’s a list of stuff that has been done:
Carb kit
New piston/rings
New rubber and seals
Plug
Head gasket

*hope it’s not the crank bearings because I don’t have a case splitter.

 

[Tyalex]

Did you Replace the main jet nozzle when you rebuilt the carb? They can cause a poor idle.

 

[Okie294life]

Did you Replace the main jet nozzle when you rebuilt the carb? They can cause a poor idle.

I’ve put 2-3 different carbs on it....SOS.

 

[captain dangers]

it could be a pulse line breaking down/split at the nipple causing it to lean out at tick-over? it does sound air leak related ?

 

[Chainsaw Jim]

Check for worn clutch springs and make sure the bearing is greased.

 

[Jasonrkba]

Is it racing at idle? Could be clutch related as jim said.

 

[Okie]

Remove the bar/ chain/ clutch and see if it still squeaks.

If still squeaky and idle not good check the pulse and intake manifold boots.

Might want to think about a pressure vacuum test.

 

[Okie294life]

Check for worn clutch springs and make sure the bearing is greased.

Thanks, I never thought that a clutch bearing could be dragging. I see where you do port work, how much would you charge to port a cylinder on this saw or an 038 mag?

 

[SteveSr]

I’m working on my 028 super, it has trouble keeping idle making, squeaking noise. I’ve readjusted the LA screw several times in attempt to get it to idle right, have the jets set correctly. It will cut strong and revs strong, but at idle it’s making a squeaking and has trouble running. I’ve checked the crank and there seems to be no play. Haven’t done a leak test. Here’s a list of stuff that has been done:
Carb kit
New piston/rings
New rubber and seals
Plug
Head gasket

*hope it’s not the crank bearings because I don’t have a case splitter.

One thing that hasn't been mentioned is that a saw that old is a good candidate for crank seals. A leak test will tell you for sure. Leaking seals can also cause an erratic idle.

 

[Jasonrkba]

I think he did the seals but you are right.

 

[Chainsaw Jim]

Thanks, I never thought that a clutch bearing could be dragging. I see where you do port work, how much would you charge to port a cylinder on this saw or an 038 mag?

Right around 200.