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I know this'll inflame the "just buy a Pingel" and/or "just buy a new OEM" crowd, but... ;-)
My petcock wouldn't shut off fully when on 'run' or 'reserve'. Wasn't leaking out the vacuum port or anything so I figured the diaphragm was OK. Took it apart and, aside from cleaning it up I turned around the o-ring on the "piston" thingy (that's attached to the diaphragm). One side of the o-ring looked like it'd been sitting engaged for too long and was squished and slightly pitted. The other side still looked pristine. Turning it around meant the good side sealed against the seat. May not last for ever, but for now: no more leaky.
I also ground off the tab on the lever keeper (as suggested in another thread) so I can turn the lever outside the normal range and definitively shut off the fuel if needed.
My petcock wouldn't shut off fully when on 'run' or 'reserve'. Wasn't leaking out the vacuum port or anything so I figured the diaphragm was OK. Took it apart and, aside from cleaning it up I turned around the o-ring on the "piston" thingy (that's attached to the diaphragm). One side of the o-ring looked like it'd been sitting engaged for too long and was squished and slightly pitted. The other side still looked pristine. Turning it around meant the good side sealed against the seat. May not last for ever, but for now: no more leaky.
I also ground off the tab on the lever keeper (as suggested in another thread) so I can turn the lever outside the normal range and definitively shut off the fuel if needed.
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