I work on a lot of different saws, most are just inexpensive homeowner type saws but none the less, I do have some practical experience. I am quite familiar with setting the metering lever to the proper height, and how to "tweak" it a little if need be depending on the conditions; for example on a fixed jet carburetor you can set them just a bit lower than book value to reduce the typical over rich high speed setting.
I have run into this peculiar situation from time to time and wanted to know if anyone else has had this experience. The latest project was a Mini Mac with the Zama carburetor. I set the metering lever correctly, put the saw together and it would not pull fuel, it would run on a prime. Pulled it all apart (the only way to access the carburetor on the MM) and reset the lever, put it all back together and the saw ran as well as a Mini Mac can. Set it down to work on something else for a bit and tried to run it again...now it was badly flooded. Pulled the spark plug and left it set overnight.
Next day it was clear that fuel was leaking into the crankcase so I took it all apart again and this time the metering lever was bent way up causing the flooding. Reset the lever again, and the saw worked just as it should.
Can anyone help me understand how that metering lever is getting bent and out of adjustment when the carburetor is fully assembled. I don't recall this ever happening with an SDC that has a fork on both ends (diaphragm and needle) but I can't say for a fact it never happens.
Thanks for your input.
Mark
I have run into this peculiar situation from time to time and wanted to know if anyone else has had this experience. The latest project was a Mini Mac with the Zama carburetor. I set the metering lever correctly, put the saw together and it would not pull fuel, it would run on a prime. Pulled it all apart (the only way to access the carburetor on the MM) and reset the lever, put it all back together and the saw ran as well as a Mini Mac can. Set it down to work on something else for a bit and tried to run it again...now it was badly flooded. Pulled the spark plug and left it set overnight.
Next day it was clear that fuel was leaking into the crankcase so I took it all apart again and this time the metering lever was bent way up causing the flooding. Reset the lever again, and the saw worked just as it should.
Can anyone help me understand how that metering lever is getting bent and out of adjustment when the carburetor is fully assembled. I don't recall this ever happening with an SDC that has a fork on both ends (diaphragm and needle) but I can't say for a fact it never happens.
Thanks for your input.
Mark