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Author Topic:   Montauk dual fuel tanks
chad posted 04-02-2001 12:25 PM ET (US)   Profile for chad   Send Email to chad  
I have the two Mirax fuel tank setup on our 1984 Montauk. Both tanks have a fuel line clamped on the tank end, routed through the tunnel with the primer bulbs and quick connectors on the aft end. One of the quick connector on the aft end of the fuel line broke this weekend and siphoned gas out of the tank. The lines are 1/4" and the replacement yahama connectors are 3/8". New project, replace the fuel lines. Question. Should I install male quick connectors to my tanks so that there is only one fuel line to the stern, and the tanks can be removed? What are the experences with dual tank fuel lines?
Chesapeake posted 04-02-2001 12:53 PM ET (US)     Profile for Chesapeake  Send Email to Chesapeake     
Interesting idea. I feel like an idiot that I had never considered it. With two tanks, as I have in the Nauset, 2 gas lines make sense, particularly since getting under that bottom console to switch connectors is a pain in the @#$. I assume then that the two primer bulbs are then located aft next to the motor.

The only thing I would be concerned about is having that exposed fitting of the line not currently in use flopping about in the back of the boat. Would think the metal on the ends could scratch the gelcoat and I would be concerned about any drops of water that might get stuck in the endhole and be transferred into the motor.

I too would appreciate anyone else's thoughts and experience in this regard.


lhg posted 04-02-2001 03:27 PM ET (US)     Profile for lhg    
For 15 years I used a single fuel line on my Nauset, with twin 12 gallon Tempo tanks under the console, with quick-disconnect fitting on each tank. Almost all other Nausets/Sakonnets/Montauks I have seen are rigger this way also. I am convinced this is the way to go, and switching the fuel line at the tank end was no big problem when one ran dry. It is easier than going back to the engine to make the changeover. The Mercury bayonet style connecters are excellent for this purpose, regardless of engine brand. They cost a little more, but are solid and don't leak. Buy the diecast aluminium kind, not the plastic ones, and they should be oriented so they face backward, not sideways.
This makes them easy to plug in. Tempo makes a good 3/8" fuel line and primer bulb. They put the bulb up near the tank, rather than at the engine end. You can buy them with or without end fittings. This also makes sense for a quick changeover without leaving the helm. Just push in and twist 1/4 turn.
FISHNFF posted 04-02-2001 05:43 PM ET (US)     Profile for FISHNFF  Send Email to FISHNFF     
When using two tanks, I have each line from the tank connected to a Tempo 3-way brass valve so I may simply switch tanks by turning a valve. Soooooo much easier and quicker, as running out of fuel at an bad/dangerous time will happen!
chad posted 04-02-2001 05:54 PM ET (US)     Profile for chad  Send Email to chad     
Where and how did you mount the valve? Do you have to reprime the bulb after switching tanks? so many questions. thanks

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