**Question about installing aluminum fuel tank on 15 1/2 ft Rally Runabout??**

shotnva7

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May 14, 2012
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I just typed up my plans with my two boats and everything I was going to do to combine the two, all to make the best boat I can! It got deleted somehow with my nosey fingers running around the keyboard a mile a minute! Lol.... This time, I'll jump straight into the question - and hope for a semi quick response!!

Here's the deal... I have a '68 Evinrude Triumph 55HP, fully rebuilt, top to bottom, runs like it came off the showroom floor! But the only problem is (so far :p) on the said boat, THE ONLY tank I have is a 5 gallon creek crawler! Not getting far with 5 GALLONS!!!! Both the motor AND the tank have the standard "two prong" connections (for lack of better terminology) like MOST small/medium size outboards... BUT I HAVE A SAVIOR! If this thread can save ME FIRST! lol....:D

I have an 18 gallon aluminum tank that I have a question about! It fits PERFECT in the backside of my boat (the seller of my OTHER boat gave it to me, it had been kept in storage with rags in the holes and EVERYTHING for almost 20 YEARS!!!! It's in GREAT condition!) And the boat already has the fuel fill hose, ground wire, AND vent hose that is all aimed PERFECTLY for this tank! If I didn't know better, I'd think this boat had THE EXACT SAME tank on it at one time!! Haha...

Nonetheless, here's the question! HOW DOES this connection work on the tanks end? I have a picture of it posted below... can I just take off the "two prong", "quick connector" on the hose and connect it to the tank's fitting with a hose clamp? :confused: I'm not sure if that fitting on the top of the tank needs a "special" hose connector or something - due to the ball in the center! I DO HAVE A PRIMER BULB ON THE HOSE! I also know that the big hose fitting coming out the top is the fill line, the small one next to it is the vent line and the screw is where the ground wire goes! Like I said, it's like my boat is "WIRED" FOR THIS TANK!! So this would be a money saver if I don't need some type of weird connector for the TANK'S end of the hose! ANY help is appreciated, as I would love to have 18 gallons and not worry about running 'er out! Plus it'll be a STATIONARY tank and fill-able from the boats "side" (again, lack of memory/terminology lol) Thanks y'all!!

Here's the tank!!!

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IMAG2494.jpg
 

shotnva7

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May 14, 2012
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Re: **Question about installing aluminum fuel tank on 15 1/2 ft Rally Runabout??**

Here's the boat in question, just for fun! She's coming along, SLOWLY! lol (my fixer upper!!)

IMAG2487.jpg


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shotnva7

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Re: **Question about installing aluminum fuel tank on 15 1/2 ft Rally Runabout??**

BUMP!

Can ANYONE help me out here! I'd really like to have a good, solid tank in the.boat! THIS IS IT! Just have that ONE question about the tanks "hookup" .....
 

Woodonglass

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Dec 29, 2009
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25,932
Re: **Question about installing aluminum fuel tank on 15 1/2 ft Rally Runabout??**

Welcome to iBoats!
I believe that is a fitting for a Mercury. You will need to swap it out for an Evinrude Fuel fitting.



Something to consider... Your little boat with an 18 gallon fuel tank (Tank and gas = approx 110lbs.)in the back will be a totally different kettle of fish.
 

shotnva7

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Re: **Question about installing aluminum fuel tank on 15 1/2 ft Rally Runabout??**

Thanks for your help my man! It was used on a Johnson 100hp though? ABOUT the same motor (in terms of years and the shift-tronic crap) as my 55hp Evinrude!

Nonetheless, isn't it just a "check valve"?? I JUST NOW found out what the dang thing was called! Lol.... I believe it moves with a spring once the gas is drawn to the motor, and is ONLY there if something in the fuel system fails! (To prevent it from gassing my boat down!) I believe all i need to do is take off the quick release end, on the tank side and slide it over that nipple....

...that is if I'm not mistaken!!
 

shotnva7

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Re: **Question about installing aluminum fuel tank on 15 1/2 ft Rally Runabout??**

EDIT: Sorry - tried to edit this into my previous post! It wasn't working for some reason?! Stupid HP!!! lol...

Am I correct on my previous post about being able to tap right into that fitting with the fuel line DIRECTLY and then clipping in the OTHER end into the motor via the "quick release - two prong" connector?

I HAVE ALSO taken the weight into factor, its only a 16 gallon tank, not an 18 (I found out!).... Though I know its not much difference! Nonetheless, boat rides HIGH in the back, on the water... And there's never going to be more than 3 ppl on this boat at a time. The tank will just be the 4th person! Lol... I don't THINK weight will be an issue as this motor pushes this boat decent.... VERY DECENT!
 

shotnva7

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Re: **Question about installing aluminum fuel tank on 15 1/2 ft Rally Runabout??**

ALMOST 200 views and no one can tell me if I can hook the line directly to that tanks fitting on top?!

.... Figured someone would be able to tell me! Or is the other fitting the ONLY way? I'm just thinking I can take off the quick release thing on the hose and connect that same tube to the fitting!?
 

Woodonglass

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25,932
Re: **Question about installing aluminum fuel tank on 15 1/2 ft Rally Runabout??**

Every Johnson/Evinrude fuel line connector I have seen looks like the one I posted for the tank and the hose has one of these.


I'm guessing the connection on your motor looks like this as well.

Not a good idea to connect the fuel line directly to the tank.

You usually don't have a 100 lb person sitting in the very back of the boat. It will make a difference in the handling of the boat especially when getting up on plane with a full tank of fuel.
 

JDA1975

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Aug 27, 2011
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Re: **Question about installing aluminum fuel tank on 15 1/2 ft Rally Runabout??**

remove that check valve fitting, purchase an evinrude/johnson fitting for less than 10 bucks...those fittings are designed for safety and ease of proper connection...the one on the tank is threaded and will remove easily
 

shotnva7

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May 14, 2012
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Re: **Question about installing aluminum fuel tank on 15 1/2 ft Rally Runabout??**

remove that check valve fitting, purchase an evinrude/johnson fitting for less than 10 bucks...those fittings are designed for safety and ease of proper connection...the one on the tank is threaded and will remove easily

The one on the TANK ISN'T THREADED? Its a male nipple thing with a ball in it!?
 

JDA1975

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Re: **Question about installing aluminum fuel tank on 15 1/2 ft Rally Runabout??**

dont look at the nipple ..look at where it enters the tank after the 90...the entire valve comes out and replace with the proper valve
 
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