Will 3 1/2 Tohatsu draw fuel through modified cap?

[jspringator]

I modified a fuel cap for my Honda generators so it can draw fuel from a remote tank via suction. Can I do the same thing with my Tohatsu 2 stroke 3 1/2? I got a spare cap, removed the vent assembly and used JB weld to install a hose barb, then put on a marine fuel fitting.

I don't see why it wouldn't work on the Tohatsu. Anyone done this? Is there any cap retention chain that would have to be removed?

 

[TGuy]

Re: Will 3 1/2 Tohatsu draw fuel through modified cap?

Not sure if it would work with suction only, but I remember years ago some guy did something similar on the 3.5 2-stroke model. Rather than using suction he just left the primer bulb on and as the motor would get low he'd just squeeze the bulb a few times to pump some more gas from the external tank to the internal one. Here's a link to a blog showing his modification:

http://nwpotters.org/mods/elnino/gastankmod.html

 

[TOHATSU GURU]

Re: Will 3 1/2 Tohatsu draw fuel through modified cap?

If you have the A model 3.5 there is a fuel pump available for it.

 

[pvanv]

Re: Will 3 1/2 Tohatsu draw fuel through modified cap?

The M3.5 in stock dress is gravity feed. So if your external tank is above the motor, it would supply fuel to the main tank. Or you could install the vacuum-operated, albeit puny, fuel pump for the 3.5A model, and just connect a separate tank.