Chainsaw wont start

[Harry_L]

The thing is it started before fine then i left it for 2 days and it wouldn't start anymore...

 

 

Sent from my iPhone using Arbtalk

[peatff]

Buy a can of carb cleaner and blast trough all the holes while you have it apart and check the diaphragm under that cover has not split or gone brittle. Level setting is done by bending the lever not by any screws.

[bmp01]

That side of the carb is called the metering chamber, coz that's the side that controls the amount of fuel going thro the carb. .. Was it bone dry when you took the cover off? If so that tells you there was no fuel getting through. Now you need to figure out why.

Don't touch that brass coloured screw - that's a jet which will limit the fuel flow to the high speed side of carb.

The little Lever with the spring under it operates a valve - push down gently on the lever and you'll see the valve bring lifted. Does that work? The end of the lever should be flush with the face of the carb, when the spring has returned it to its rest position, is it?

Also, as you can take decent pictures, take the cover right off, turn it over and post a picture of that too.

 

bmp01

[bmp01]

This is well worth a look, Zama Technical Guide. You'll find the setting info for the metering lever in there.

 

http://www.zamacarb.com/pdfs/TechguideSO.pdf&ved=0ahUKEwiUlZudk7XTAhXIJlAKHb3RD18QFggeMAI&usg=AFQjCNGLlvPYMb6LZUNDqoT_UovEWcER1A

 

Just one question, that silver cross head screw inside the metering chamber, does that look messed with - has someone been in that carb before?

 

bmp01

 

Edit - metering lever looks like it is very high in your picture, is that just the cameras perspective or has that been messed with too?

Edited April 21, 2017 by bmp01
edit note added

[EricBradley]

The metering lever (the little arm that has the tiny spring underneath) looks far to high, if you put a flat edge like a rule across the carb body the lever should just touch the flat edge. I will just go and take a pic of what you should be doing.

[EricBradley]

 

[EricBradley]

Also going by the damage to both screws in your picture I would reckon someone has been inside this carb before.

[Harry_L]

Yeah mine is about 2mm too high.

How do I fix this

Thanks

 

 

Sent from my iPhone using Arbtalk

[Harry_L]

 

 

Sent from my iPhone using Arbtalk

[Harry_L]

I fixed it now, its level.

 

 

Sent from my iPhone using Arbtalk