Mark wrote:
I recently purchased a boat with a mercruiser stern drive. The carb fuel
inlet has a T with a fuel line feeding back to another T on the inlet side
of the fuel pump. With this loop it seems like it compromises the fuel pump.
Anyone know about this?


Is there a thingamajig that looks like it might be a small in-line
spring-loaded valve in this line, or perhaps built into one of the T's?

What you describe is a very common way of regulating fuel pressure
delivered to the carbs.

Fair Skies
Doug King