Posted by NolanJae on November 21, 2011 at 14:17:44 from (156.98.127.101):
I've posted quite a few items a week or so ago ref my rebuild. I'm down to the last few items and i'm still not there. Looking for more ideas. I had a mysterious bobble after an overhaul and I thought I found the issue when I found that the oil pump and dist were worn out. replaced both and played with the oil pump positioning and got her in happy middle ground. It made a difference.....but still has a slight miss... I plowed some snow the other night and its not right yet. Still having issues while under a load. It will get to a point where the gov kicks in cause of the load and it will kill the motor unless you throw in the clutch and back the throttle off. My exhaust manifold is not in the best shape so I have ordered a new set of both exhaust and intake manifolds. I did order them off ebay--made in china....not real thrilled but I think they should work. They will come soon. I do have some exhaust leak on one exhaust port but I sprayed wd around all the intakes and carb and it did not change anything. Dont know if it would do anything cause it is slight and does not run rough ..except every now and then it has a bobble and it does not matter if it is high speed or idle it shows up. The bobble is faint and even when its running at full speed the bobble or miss wont hit on at steady rythmic time-just every 3-5 seconds or so sometime longer and sometimes quicker with a longer pause between them . Have set the static timming several times but does not remove this little bobble. While trying to find the source of this I removed the oil cup from the air filter and it has great suction. put it back on and you can hear the bobble all the way back to the air filter. Sounds like a popping sound comming from the oil cup. I can hear this slight bobble/stumble from the exhaust and from the air filter. It does not improve by removing the oil cup or anything I do. While running the motor at all different speeds I walk away and can hear the bobble even better. I guess the only thing I can do now is rebuild the carb and replace the heat riser/exhaust and intake. I have not replaced the coil but could that be the issue as well? Hope the carb rebuild will fix it but right now I'm not super hopefull. I do think the carb might be the issue because I can adjust the air mixture needle all the way in close it down and it is has a slight change. I can also back it all the way out and it only changes when I pull the needle all the way out but it will still run but runs rougher. Any other ideas.
What plugs shoud be in the old girl. I just replaced the old ones with the same ones-autolites.
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