My 69 won't start with under 16 gallons- help!

[Mil1ion]

How much of your fuel line is rubber?

Keep it to a minimum.
1) Rubber absorbs heat

2) Rubber breaks down and allows air in causing fuel delivery to the carb problems

[jim2f]

When your engine decides not to start, pull the fuel line on the discharge side of the pump. Crank the engine and see if you are getting fuel there. Crank it until it fills a something the size of a coffee can. It should fill pretty quick if you are getting fuel. If no fuel you know its the pump or the lines feeding the pump. If you are getting fuel on the disharge side install a gage between the pump and carb to see what kind of pressure you are getting.

A friend just had to replace all the steel lines from his tank to the pump due to build up of crud in the line. Remove your fuel line at the tank and the inlet side of you pump. blow compressed air through the line...look for sediment and sludge getting pushed out.

The canadian is right. check all the rubber lines too.