On 10/02/2016 06:30 AM, Tekkie® wrote:
posted for all of us...

You think vacuum wipers sucked, you want to experience a vacuum
fuel pump (like on my old '28 Chevy

Never came across one of them. They must have been great while starting.


http://wiki.bssd.org/index.php/Diaphragm_Fuel_Pumps

They aren't vacuum only since they're tapped into the two-stroke's
crankcase but they work. A lot of bikes with gravity feed fuel systems
have a vacuum operated petcock. Usually there's enough fuel in the float
bowl to get the engine running. If not, the petcock has a 'prime'
position to manually allow fuel flow.

I had a '62 Continental where many of the functions like the heating
system were vacuum operated. That was a joy when they started failing.