making a long gas hose

[jasper60103]

Hi, All.
Newbie here.

I want to make a long gas hose (about 16-18') so I can put my tank in front of my front bench seat.

Looking for tips and advice on building a good fuel hose.

Here are the parts I selected based on the Sierra Fuel Line Assy #18-8058. http://www.iboats.com/Sierra_18_805...3738309--**********.059936892--view_id.187540

(2) 18-9092 Fuel connector (couldn't locate part on iboats?)
(1) 18-8005 Primer Bulb, 3/8"
(1) 18-8063 Tank connector.

I was told I could buy 3/8" inside diameter hose (by the foot) from Napa. 50' from iBoats is way more than I need, not to mention $60.
Also, I thought I would get the hose clamps from Napa as well.

Also, my boat has a channel for electrical wiring that I use to run my hose through, which will keep it out of the way and protect it. Fyi. No electrical wiring in there now.

Does this sound like a good plan?
Are there better choices for parts?
Locating the tank in the front will help balance the load in my boat, but do I have to worry about fuel leaking from the tank vent when the bow raises up? Btw, its a 6 gal plastic atwood tank.

thanks,

jasper

 

[Tim Frank]

Re: making a long gas hose

If it was me, I'd break your current gas line at the outlet side of the bulb and replace with a 20 foot length of the right size hose for the outlet nipple and your motor connection. Saves buying the bulb and connector fitting.
I think it should be 1/4" ID hose that you need, but am not positive.
Someone here will know.

Re: the potential fuel leak when the bow lifts, unless I am missing something, being in the bow will not give it a greater change in inclination than it would get in the back.

 

[Gary H NC]

Re: making a long gas hose

Make sure its USCG rated fuel hose.West Marine and other boat supply places sell it by the foot.Keep the primer bulb back by the motor.
The connector ends can be bought at Walmart.
It should work fine.
3/8th hose maybe overkill for that small motor.5/16th should work.

 

[fdmsiv]

Re: making a long gas hose

I am thinking about doing the exact same thing. My plan it to have the hose leave the tank in the bow/forward area then in the transom area, maybe in the splashwell it will be like this

hose -> bulb -> hose -> filter/seperator -> hose -> detachable fitting -> hose -> J/E female fitting

I bought a pre-made bulb section for my test tank and the crimp on hose connectors are leaking and or letting air in. I am going to buy all of the fitting and some ss hose clamps to make the assembly myself.

Fuel hose is not cheap, good fuel hose is going to run in the ~$3 per foot range, other than that the fitting aren't too much $$$$$.

 

[Gary H NC]

Re: making a long gas hose

I always thought the primer bulb should be after the filter and the last thing in line before the motor.
When i added my water separator filter the directions stated just that.

 

[Rick.]

Re: making a long gas hose

The price difference between 3/8 hose and 5/16 hose is minimal. I just bought a 25 foot roll of 5/16 for about thirty dollars and it is good quality. I'm not certain of your setup but I would recommend having the bulb close to the motor for a couple of reason which may or may not apply to you situation. The bulb is handier closer to the motor and if left sitting in the hot sun the pressure build up in say 20 feet of hose is appreciable. If the bulb to the female fitting is less than a foot the pressure on the the carb. float valve will be much less as the majority of the pressure will be vented out the tank. There are those who will correctly say the motor connection should be disconnected when not in use but I find that many times you intend on going back out soon and then something comes up and several hours later .........if you know what I mean.

 

[jasper60103]

Re: making a long gas hose

The filter wasn't listed as part of the Sierra Fuel Line Assy. So, should I add this filter to my hose?

Yea, I plan to keep the bulb close to the motor for convenience.

thanks,
jasper

 

[Dhadley]

Re: making a long gas hose

Basically the bulbs are better "pushers" than "pullers". That being said, they work well placed right after a filter (good volume available). When making a ling run it's a good idea to use a slightly larger line on the longest run. Most of the time it works out so you run (in this case) a 3/8" ID from the forward tank back to the filter, assuming it'll be back near the motor. Then you can use the 5/16" on the outlet side of the filter (5/16" ID recomended for this 25 hp). The bulb will end up back near the motor for convinience.

Now, if you're going to use a 6 gallon tank it may only have a 5/16" fitting so you're kinda limited. Some 6 gallon tanks do use 3/8" fittings and typically don't have a quick disconnect at the tank end.

Using 5/16" hose on an 18' run may be iffy, the 25 may be OK. You could rig it up and run a pressure & vacuume test to be sure. And before it comes up - no, don't get involved with electric pumps.

 

[Dhadley]

Re: making a long gas hose

And for clamps, use the correct nylon tie strap not a ss screw clamp.

 

[jasper60103]

Re: making a long gas hose

OK, so it sounds like I should add this fuel filter.

I'm clear on where to insert it, but can someone clarify what kind I should buy?

Here the link to Johnson fuel filters...

http://www.iboats.com/Johnson_Fuel_...6087725--**********.600689247--view_id.271383

Also, good tip on the nylon straps.

thanks again.

jasper

 

[Dhadley]

Re: making a long gas hose

Those are just the replacement filters. Look for the filter kit.

 

[jasper60103]

Re: making a long gas hose

Oh, that's getting too spendy for me.

thanks,

jasper

 

[ezeke]

Re: making a long gas hose

I'd like to add that the water separating fuel filters that everyone needs work on gravity and need to be in a fixed, upright postion. Function will be improved with a lack of agitation that would probably preclude locating them in a forward position.