Fuel Tank & Petcock

-Check inside of the gas tank for rust – remove the rust with Evaporust or similar product or other method
   -- If rust has been in there, a good idea to put fuel filters on each fuel line to carbs

-Check gas tank for any leaks – most common areas are bottom seams or tank mounting brackets
   --Don’t waste your time/money on painting a tank if it leaks

-Check that gas cap provides for proper venting – sometimes they get plugged with polish, etc.

-Check petcock for proper operation
  -- on “Prime” position, fuel should flow freely from all 3 fuel fittings
  -- on both “Reserve” and “On” position  - there should be no fuel flow until/unless a vacuum is applied to the vacuum fitting of the petcock – easy to put a line on this fitting and lightly “suck” – gas should flow

- If gas leaks through the petcock, the most usual problem is a torn “4 hole” gasket that sits right behind the lever

- If no gas flows when it should, the cap vent could be plugged or the petcock needs rebuilding, kits are available to rebuild the petcock

-Always a good idea to pull the petcock off the tank and check to make sure it still has the 2 filters on the inlet pipes. Also take off the sediment bowl and check/clean it and the 2 hole screen to assure of good fuel flow.