My recently acquired chipper has a Honda GX670 powering it. The chipper performs fine until it has been running for about 2 hours. The engine starts losing power intermittently. It will drop revs under load and die unless I reverse the feed. It will then speed back up but will be very load sensitive until I finally get tired of babying it and quit for the morning. It will sometimes start dropping revs even without a load and then slowly regain speed. Pulling the manual choke out a bit helps some, but is not a fix. The fuel filter was replaced less than 10 running hours ago.
My guess is that the carb and fuel is getting warm enough to cause mixture problems, but I'm unsure how to test this hypothesis and what a fix might be if I'm right. What else might be the problem if I'm wrong?
Complicating my trouble-shooting are (A) the long running time before the problem arises and (B) that the chipper is 70 miles from where I live and parked in a remote meadow where we are doing some clearing, so I can't easily run out to it and fiddle with settings.
Thanks in advance for any help you can provide.
My guess is that the carb and fuel is getting warm enough to cause mixture problems, but I'm unsure how to test this hypothesis and what a fix might be if I'm right. What else might be the problem if I'm wrong?
Complicating my trouble-shooting are (A) the long running time before the problem arises and (B) that the chipper is 70 miles from where I live and parked in a remote meadow where we are doing some clearing, so I can't easily run out to it and fiddle with settings.
Thanks in advance for any help you can provide.
