0470 running bad

[Gary S]

I have a angle valve 0470 that since I rebuilt it always ran great. The other day had it on the ground changing trailers and it started running bad. Missing like it was only hitting one 3 cylinders. Pulled mags, they were hot. Changed filter, old one had no water,drained carburetor, no water there. Took carburetor apart that Greg McCloud had built for me to see if maybe a piece of trash was in it. Nope clean as a whistle. Grasping at straws I went ahead and changed plugs which wasn't a total waste of time or money as I haven't changed them since rebuild. But it changed nothing. Started checking clamps on intake and leaned on the pipe that runs from one side to the other. It broke off. I tape up the hole where the pipe went in and the end of the pipe, cranked it up and back to hitting on all 6. Boy was I happy. Now all I have to do is get it welded back on.

 

[Juandi]

Glad you found the problem. I’ll have to check my clamps and tubing. Mine has a rough idle but they say that’s how these engines are. Once I get it up to operating range it purrs nicely.