Originally Posted by Guy
Like the previous poster said, it's probably the shaft O ring. Over time both the shaft, O ring and housing wear and then leak. If you change just the O ring that might fix things for a while.
Guy you are correct,it will be the shaft o-ring thats leaking due to worn
Trottleshaft and Bushing in Governor Cover.
To change that o-ring you have to remove the cover (very tricky to re-
install ) take out the shaft after removing the Throttle lever and replace
o-ring.Watch out for a thin washer between shaft cover bushing.
The lever sits on a fine splice on the shaft,so mark the position very
carefully before removing it from the shaft or you will not get your proper
idle and high idle RPM
after re-installation.You have to replace the cover
o-ring as well.Note: there are 2 different o-ring sizes for the cover,make sure
you have the correct one.
Hope the pump is easy accessible .