Connecting a 2nd gas tank to a Mercury 40hp 4 stroke

[notesafloat]

I recently bought a 15' Quasar skiff (1991) powered by a 40hp 4-stroke Merc (2014). It came with a 6 gallon gas tank. I launched it today and used it for the 1st time - It performed great. But I'd like to connect a 2nd tank (5 or 6 gallons) to the engine to extend my range or time on the water.
Can this be done easily? What components will I need?
Thanks in advance.

 

[GA_Boater]

Welcome aboard.

The easiest way is to swap the fuel hose to the motor from the empty tank to the full one. Any other way means adding fuel line plumbing and the possibility of leaks, both fuel and air.

 

[notesafloat]

Welcome aboard.

The easiest way is to swap the fuel hose to the motor from the empty tank to the full one. Any other way means adding fuel line plumbing and the possibility of leaks, both fuel and air.

It's not easy to swap fuel lines since, on a Merc 40hp 4-stroke, the shroud has to be removed to disconnect the fuel line.
Thanks for your reply.

 

[BWR1953]

It's not easy to swap fuel lines since, on a Merc 40hp 4-stroke, the shroud has to be removed to disconnect the fuel line.
Thanks for your reply.

You swap at the tank, not at the engine. All it takes is a quick disconnect setup. See "D" and "E" in the pic below. I have this same setup and it only takes a couple of seconds to change tanks.

 

[GA_Boater]

It's not easy to swap fuel lines since, on a Merc 40hp 4-stroke, the shroud has to be removed to disconnect the fuel line.
Thanks for your reply.

I said swap the hose between the tanks.

 

[JimS123]

Easy Peasy. I have linked multiple tanks on every outboard boat I ever owned.

IBoats sells a "kit". My Whaler sports the one in the picture. I used the valve with 3 inputs and merely plugged the one I didn't need.

Obviously, you need a couple sections of approved fuel line and hose barbs and clamps. I have yet to ever see a leak. OTOH, on hot days there is always a bit of pressure in the system and there will ALWAYS be a few drops of gas spilled when you switch fuel lines.

(PS - the valve in the pic costs $19)

Groco Fuel Tank Selector Kit For 2 Tanks

Fuel Tank Selector Kit For 2 Tanks - Groco

www.iboats.com

 

[Scott Danforth]

It's not easy to swap fuel lines since, on a Merc 40hp 4-stroke, the shroud has to be removed to disconnect the fuel line.
Thanks for your reply.

millions of boaters simply swap the hose between the tanks. one motor, one hose, unplug from one tank, plug into the next. you would be the only one that would have two hoses two tanks and one motor.

 

[notesafloat]

You swap at the tank, not at the engine. All it takes is a quick disconnect setup. See "D" and "E" in the pic below. I have this same setup and it only takes a couple of seconds to change tanks.

View attachment 329985

Hi, do you know what Tank Connector "E" is called? So I can search the web for it.
Thanks

 

[BWR1953]

Hi, do you know what Tank Connector "E" is called? So I can search the web for it.
Thanks

Just search for a Mercury Marine fuel tank quick connect. Plenty of choices out there.

 

[JimS123]

If you have a Merc motor with a Merc tank, then just buy a Merc tank as your second one. When in use, be sure to push the vent button every time you switch tanks, to ensure that you release the pressure. Otherwise you'll be squirting gas all the time.