Question about fuel lines...

[rgranger]

Hey All

I have a question about fuel lines for outboards. My new-2-me Balboa 26 has an internal tank. It was full of fuel when I purchased the boat and yes the ethanol had made the gas bad. I figured this out by running my O.B. with an external tank.

So I pumped out all the old gas, and replaced the fuel line with one I purchased at Auto-Zone.

I also got a new bulb and a new fuel filter.

Here is my issue, I now can't pump the bulb hard. So before I assume there is a fundamental difference between a marine fuel line and an auto fuel line.... should I be wondering if the new bulb is defective? The auto fuel line is more flexible (rubbery) and less "platic-like".

Anyone know the answer here? I'd hate to pull the line only to find it was the bulb.

 

[Ward H]

I had that problem once. Be sure you have the arrow on the bulb pointing to the motor AND pointing up.
Not sure about the fuel line. Others will probably have the answer on that.

 

[Duke]

I am not familiar with your system, but it could be you have an air leak. Is it possible to apply a soapy solution to the connections and fittings to check for bubbles / air leaks when you try to pressurize the line? (I have used a solution of about a table spoon of dish liquid to a cup of water to troubleshoot both plumbing and fuel circuits.)

 

[Winkfish]

It could be either an air leak (more likely) or a bad bulb. Double check your fuel line connections first. If that doesn't work, try another bulb (maybe the old one you had, since that apparently worked?)

 

[Merlin Clark]

I have a Force 50 whose bulb doesn't pump firm and the same with my Tohatsu 6hp but with all 3 Johnsons (6, 8, 14) the bulb pumps firm.
All of these motors run fine.

 

[rgranger]

Thanks guys... so I'm getting the impression that the line is probably not the problem. I'll try the soap thing and then install the old bulb if that does not work.

Ain't old boats fun

r

 

[Fernando Martinez]

If the line is very soft then it may collapse or kink to prevent fuel from flowing. Fuel lines should be marine grade which will say uscg approved not auto type fuel hose.

Regards,

FM

 

[centerline]

not all systems need to pump firm to deliver fuel and run... if yours runs fine without a firm bulb, then there is no problem....

remove the line from the carb and pump the bulb. if there is fuel delivery then you should be good. all the bulb does is prime the line and fuel bowl when you run out of fuel and have to change tanks, or otherwise get air in the line. once the line is primed with fuel, the engine fuel pump does the rest...

and the automotive fuel line wont last as long as a marine rated line, but even some marine rated fuel line is not good to use with an outboard because it will get stiff and cause stress at the fitting when turning the motor.... there is a grade of silicone hose that is rated for gas and it is tough, soft and pliable, and will remain so even in freezing weather.... i think it also has a marine rating.

 

[Chris Patterson]

I use what's called "push-loc" line that is available at hydraulic supply shops. Gates uses the designator of -LOR-, or -LOL- on the hose, has a 300lb. working pressure, and lasts for a very long time.
Most automotive grade hoses are in my opinion not worth fooling with, and they tend to be cheaper in construction, ie: lower life span.