I get the cub and a new battery, clean up the points, do plugs, pull the tank off to give the acid treatment and get a temp fuel tank set up. Got it to burp and sputter and that’s about it. Pull the carb which ends up having a pretty well warped top half. Throw the new carb on and it leaks. Ha go figure. Set the float which was way out of adjustment, not sure about the needle having a spring loaded ball on the end but maybe it’s a better design. Three days of farting around and I still can’t get it to stop leaking. Mind You I had also ordered a rebuild kit for the original. I stop procrastinating and make a straightening jig and am pleased with the results. Go to put the seat in and have the dreaded problem of it being quite tight and only going in so far before coming to a screeching halt.
Now when researching the needle and seat problem I read a quite a bit about avoiding this one or that one, get it from here not there or try the Kohler one. Then the one that has too many threads and bottoms out. Seems that last one was my issue. I check the bore depth and the length of the seat and it appears to be acceptable. Well I’ll be darned if this thing really doesn’t have too many threads. Not that the threaded portion is longer and bottoms out at the bottom of the bore but it is 26tpi not 24tpi. Now I may have missed this somewhere and apologize for repeating it but I’ll add some pics to my finding to clarify what too many threads really means.
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So the old needle and seat went back in with one new main gasket and she fires up and runs as good as it can get. As far as the new carb goes I took it apart again and the plastic float separated at the seam. Enough of that! I spent far less time straightening the old carb and putting a gasket in it with greater satisfaction to boot.
