Rebuilding my early petcocks.
Acquired 2 MikesXS petcock rebuild kits a couple years ago.
The oval body o-ring is the correct thickness, at 2mm.
But, the fuel selector "whizzer" valve gasket has a problem.
The OEM valve is 3.0mm thick.
The MikesXS valve is 3.5mm thick.
If it's greased-up good, it'll eventually press in there.
But, the selector lever (even with a polished face) is quite a bit stiffer to turn.
The MikesXS valve also has a grainy appearance compared to an OEM valve. The OEM valves also have a number embossed in the center of one side.
Also acquired 2 MikesXS petcock mount screw and washer kits.
The OEM screw has a flange face, and uses a fiber sealing washer.
The MikesXS kit has metal washers, and metal-cored fiber sealing washers.
Don't know why the steel washers, they'll just leak.
An edge-on view of the metal-cored sealing washers, compared to the OEM washer.
Ordered OEM whizzer valves and sealing washers from boats.net.
Should be here in a few days...