97 Merc 5.7L 2bbl carb, mech. fuel pump
Just recently installed a new longblock in the boat. Used original fuel pump, carb and intake. Replaced fuel hose between tank and water separator with marine line because the old one was about an inch too short. Hose is now about 2' long.
If the boat sits for more than a couple of weeks, it has no gas. Cranking won't draw fuel to the motor. Only way to start it is to pour a small amount of fuel down the carb. Then it fires right up. Most of the time, that's sufficient to get fuel flowing, sometimes it takes a second priming.
To me this sounds like a check valve problem, but I would also think the fuel pump should be able to draw fuel through an empty line at engine cranking speeds.
Anyone have an idea as to where the actual problem would lie or should I start changing items until I find the problem?
Just recently installed a new longblock in the boat. Used original fuel pump, carb and intake. Replaced fuel hose between tank and water separator with marine line because the old one was about an inch too short. Hose is now about 2' long.
If the boat sits for more than a couple of weeks, it has no gas. Cranking won't draw fuel to the motor. Only way to start it is to pour a small amount of fuel down the carb. Then it fires right up. Most of the time, that's sufficient to get fuel flowing, sometimes it takes a second priming.
To me this sounds like a check valve problem, but I would also think the fuel pump should be able to draw fuel through an empty line at engine cranking speeds.
Anyone have an idea as to where the actual problem would lie or should I start changing items until I find the problem?
