Running Fuel Lines to Prevent Problems

[fastjeff]

I learned the hard way--thanks to adopting clear plastic fuel hoses, that allow me to see what's going on--how fuel lines should and should NOT be run. I struggled for months with a "fuel pump problem" that was actually caused by running the fuel line incorrectly.

Study the sketch below and you'll see what my clear plastic lines taught me: In one case the line was half full of gas! In the other, it was all gas.

Jeff

 

[papyson]

good example jeff...fuel and bilge pump lines should both be run uphill with no dips....a bilge pump will work if there is a non airtight connection where the air will escape....of course that wont fly with gas...

 

[wynjim55]

I've been advised to ensure that the fuel primer bulb be kept vertical to allow the seals to work correctly. Would that make sense?

 

[papyson]

i saw that mentioned one time on here recently....every boat i have had in 55 years of boating they have laid flat with no problem..the important thing is no dips as Jeff mentioned......its also nice to have that bulb where you can reach it from the drivers position if you ever need to squeeze it to get in or for troubleshooting if you are alone in the boat...

 

[Docksidemarineservices]

I've been advised to ensure that the fuel primer bulb be kept vertical to allow the seals to work correctly. Would that make sense?

Vertical with the arrow pointing up helps the internal check valves seal for easy priming.