Stihl 056 - Help!

[MplsDon]

I picked up a non-running 056. I put in a carb kit. It runs on starter fluid but not on its own. Fuel is getting to the carb but not through the carb. Any suggestions?

 

[Woodslasher]

I'd check the intake boot and impulse line for cracks.

 

[2StrokeFondler]

Did you replace the needle lever? If so, did you check it's height is correct?

 

[MplsDon]

Did you replace the needle lever? If so, did you check it's height is correct?

I replaced it but did not check height. Do you have a process/spec?

 

[MplsDon]

I'd check the intake boot and impulse line for cracks.

Intake boot doesn’t have cracks but might be too compressed. Impulse line looks like a bear to get at. Is there a way to test?

 

[atpchas]

I replaced it but did not check height. Do you have a process/spec?

See below

 

[Jasonrkba]

Check the needle height. Starter fluid is frowned on with saws. Gotta be weak pulse or that needle aint opening. Is the plug wet at all? I've been learning about the 056's myself here lately. Unique ignition and seal.

 

[2StrokeFondler]

I replaced it but did not check height. Do you have a process/spec?

The 056 should have a Tillotson HS-118. Their manual (https://tillotson.ie/wp-content/uploads/2015/07/techinfo_hs_eur.pdf) for HS series says: "Inlet control lever is properly set when flush with the floor of the diaphragm chamber."

 

[hotshot]

I picked up a non-running 056. I put in a carb kit. It runs on starter fluid but not on its own. Fuel is getting to the carb but not through the carb. Any suggestions?

Could be a number of things on a used 056.

First step is to pull the top cover/handle & muffler, then inspect the condition of the piston & cylinder bore. Look for any scoring or carbon buildup.

Second is to block off the intake & exhaust ports, then pressure & vacuum test the crankcase.

Rubber bits (hoses, boot & crank seals) on that old of a saw are likely degraded. An air leak can keep the impulse diaphragm from pumping enough fuel.

That saw is worth a good visual inspection before running it...and not ruining it.

 

[MplsDon]

Check the needle height. Starter fluid is frowned on with saws. Gotta be weak pulse or that needle aint opening. Is the plug wet at all? I've been learning about the 056's myself here lately. Unique ignition and seal.

Thanks. Plug is not wet. I didn’t really run it on starter fluid. Just multiple fires.

 

[MplsDon]

Could be a number of things on a used 056.

First step is to pull the top cover/handle & muffler, then inspect the condition of the piston & cylinder bore. Look for any scoring or carbon buildup.

Second is to block off the intake & exhaust ports, then pressure & vacuum test the crankcase.

Rubber bits (hoses, boot & crank seals) on that old of a saw are likely degraded. An air leak can keep the impulse diaphragm from pumping enough fuel.

That saw is worth a good visual inspection before running it...and not ruining it.

Thanks

 

[MplsDon]

Could be a number of things on a used 056.

First step is to pull the top cover/handle & muffler, then inspect the condition of the piston & cylinder bore. Look for any scoring or carbon buildup.

Second is to block off the intake & exhaust ports, then pressure & vacuum test the crankcase.

Rubber bits (hoses, boot & crank seals) on that old of a saw are likely degraded. An air leak can keep the impulse diaphragm from pumping enough fuel.

That saw is worth a good visual inspection before running it...and not ruining it.

Thanks!

 

[Patrick1903]

New clean fuel? Fuel lines not torn/cracked? Fuel getting past pickup? (Can try removing pickup if tank and fuel are clean). Carb settings at a reasonable starting point? Those are quick and easy, then pull exhaust, and pressure/vac test.