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mike657894 · 08-28-2019, 08:20 AM

Your use of the valve depends on the seal you get out of your needle and seat in the carb. Carb stays dry and doesn't weep or leak. You can leave it on forever. I cleaned my valve with some diamond polishing paste. Mine was hard to turn as it was over tight to try to seal it and it leaked slightly still. I took it apart to find deep scratches(probably from tank debris) on the sealing surface. Lapped with polish for 20 min till he scratches disappeared. When back together it gets a good seal with minimal tightness and the valve turns very easily. Before you had to grab it just right to get enough force to open it.

08-28-2019, 08:20 AM	#10
mike657894 Senior Member Join Date: Oct 2015 Location: Bay City Michigan Posts: 1,050	Re: Gas Shut Off Valve Your use of the valve depends on the seal you get out of your needle and seat in the carb. Carb stays dry and doesn't weep or leak. You can leave it on forever. I cleaned my valve with some diamond polishing paste. Mine was hard to turn as it was over tight to try to seal it and it leaked slightly still. I took it apart to find deep scratches(probably from tank debris) on the sealing surface. Lapped with polish for 20 min till he scratches disappeared. When back together it gets a good seal with minimal tightness and the valve turns very easily. Before you had to grab it just right to get enough force to open it.