To answer a question you asked several posts ago and I missed, yes you could have the crankshaft big-end journal reground to a smaller size, but I think the cost would be more than buying three or four ex-contractor mowers, most of which would have good crankshafts. In the days when car crankshaft regrinding was commonplace, the experts told me that it was seldom done to anything approaching original equipment standards. The same was true of reboring cylinders.
Servicing the carburetor properly will take a couple of hours, so it is convenient to do it now, when it is not holding anything up. Bear in mind that the GXV140 is particularly prone (compared with other GXV engines) to developing gum deposits in the main jet and the emulsifier (including the tiny holes in the emulsifier). More often than not the emulsifier is glued into the aluminium body of the carburetor by hard gum. Remember, soak it out, don't try to force it out. And if you feel you really need to remove the pilot (idle mixture) screw, I suggest that you send me a PM. It is not appropriate to post about it in a thread.
