Posted by Janicholson on November 09, 2009 at 06:36:40 from (199.17.6.27):
In Reply to: W-4 (H) engine racing posted by Panja on November 08, 2009 at 16:49:04:
If the linkage that connects to the hand lever is moving the governor through its full range, there are two possible factors. Loose intake manifold or carb can allow excess air into the engine, and if rich (or choked a bit) will race. Throttle plate is open more than it should be. If manifold and carb are not loose or leaking, the plate must be open more than idle. The plate can be loose on the shaft, the shaft can be sticking, the link shaft tab in the tube can be out of its slot, or the governor can be sticking. (main springs in governors open them, if broken or weak, they do not have high RPM. Good luck, JimN
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