Need some advice: Fuel Leak

[St8975]

Need to find gas leak an change gas line from gas tank too outboard 125 mercury

[mmwjr]

Not much to go on here. What boat model do you have? Do you suspect the leak is in the fuel supply line since that’s what you mentioned or either the fill or vent lines? Is there fuel in the bilge?

[shrew]

Fuel leak is going to be pretty straightforward. Start at the tank. Inspect the tank fittings (Fill line, vent line, fuel pickup). now follow the fuel line to the engine.

Are you getting fuel vapor in the bilge near the tank or near the engine?

If you can't find it in the tank fittings, lines or engine, then you may have a leaking tank. It will happen on the bottom. water gets under the tank, water in the fuel also sits at the bottom of the tank. steal tanks rust, aluminum tanks corrode.

[St8975]

Originally Posted by mmwjr

Not much to go on here. What boat model do you have? Do you suspect the leak is in the fuel supply line since that’s what you mentioned or either the fill or vent lines? Is there fuel in the bilge?

When shut engine off have too pump line ball up for engine too start was thinking gas leak?

[mmwjr]

Normally you should only need to pump the primer bulb when the engine hasn’t been run for a day or so. If you need to do this every time I would suspect either the bulb or fuel line is allowing air in. Do either have any small cracks in them?

[shrew]

This is just the fuel draining back into the tank from the fuel line. That is normal. If the boat has been sitting overnight, I always give the squeeze ball a few squeezes until it's full.