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IH 656 Gas
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Posted by RO on February 18, 2005 at 07:03:33 from (24.124.102.196):
I've been working to get my Uncle's 656 running after it had been sitting for a couple years. The timing has been checked, the fuel system cleaned and the carburetor cleaned and adjusted. It starts right up and runs smooth. Prior to removing and thoroughly cleaning the carburetor and installing new gaskets, I would have to have the choke pulled almost all the way out to keep it running. After the carb work, it requires the choke to be about 1/3 pulled out to keep it running, but it runs smoothly at constant rpm.
When I idle it down and then increase the throttle quickly, I'm getting a lot of backfiring and popping. If I increase the throttle slowly though, it runs okay up to max. rpm----keeping the choke at about 1/3 applied.
This carburetor has the electronic solenoid but I've taken it off momentarily and put on a manually adjusted screw-type main jet adjustment off of a 460 gas.
Any thoughts as to why I might be getting the backfiring?
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