Originally Posted by Nos4r2
Why? There should be well over an hour's running for that in the built in 1.5 litre tank and it'll be a seperate fuel source so you won't use both engines if your fuel gets contaminated.
I'd be happier like that as long as I had a way of getting fuel into it from my main tanks if I needed to.
All you need is a connector the same as on your main engine with a length of pipe attached and you can fill the onboard tank from your primer bulb. (not easy but better than nothing and a damn sight easier than filling it from a can.)
I very much doubt it, with a 4HP on a large rib your going to be at 3/4-full throttle, that 1.5l tank won't last long at all.
My little Yammie malta (3.5hp) on an Avon R280 air deck has a 1.5l tank lasts about an hour tops if your going anymore than walking pace.
Not sure I would want to be refilling that tank internal tank in a sea. I would rig up a seperate 10L/25L tank specifically for the aux, although you need to buy a fuel pump or something, I think to convert a 4hp Mariner 2smoke was quoted around £100 excluding the tank for the various bit you need, was a while ago now though!