Merc 2.4EFI

[FrenchPhil]

My external fuel pump on my 2.4EFIis dead, are these standard ? if so anybody have part no?
Fuel filter part no. would be nice too.

Thanks Phil

[Hydrostream]

Bosch 0580 464 013 12V

I just use a standard merc canister filter and I return to the extra input in the filter housing.

[bigboy]

Originally Posted by Hydrostream

Bosch 0580 464 013 12V

I just use a standard merc canister filter and I return to the extra input in the filter housing.

So Alan your return line from the efi goes to the filter and not to the gas tank itself?

Thats quite a good idea if you dont have an extra connection at the tank.

[Hydrostream]

Originally Posted by bigboy

So Alan your return line from the efi goes to the filter and not to the gas tank itself?

Thats quite a good idea if you dont have an extra connection at the tank.

Yeah Glen, thats the way I rig it on our cats as the cat has two tanks (port & starboard). I didnt want to return to only one tank or mess around with a return line changeover valve aswell as a tank changeover valve. The other way would be a buffer tank in the back and three fuel pumps, two lift pumps and an EFI pump, too much electrics!!! I like as little electrics in a boat as possible!

Returning to the filter is the shortest and simplist way to do it, just make sure the EFI pump is after the filter not before (should be anyway).

Merc, actually advises against returning to the filter for whatever reason but we've never had an issue!

But to be honest if there was only one tank in the boat I would return to the tank to allow any air in the fuel to escape!

[FrenchPhil]

Thanks Alan, my setup is :

Tank -> Fuel Pump -> Fuel Filter -> Engine-> Tank

[Hydrostream]

Originally Posted by FrenchPhil

Thanks Alan, my setup is :

Tank -> Fuel Pump -> Fuel Filter -> Engine-> Tank

Hi Phil, just a suggestion, but I would put at least a screen before the pump to stop any debris making its way into the pump!

Alan

[mike k]

Hi Alan, hows the 1900 ss builds coming on ?

[Jon Fuller]

Originally Posted by Hydrostream

Merc, actually advises against returning to the filter for whatever reason

I would guess because any air (bubbles) in the fuel will get reintroduced to the closed fuel circuit loop, rather than being disposed of back to the main tank.

Before they leave the regulator at rail pressure, they'll be tiny, but as they drop in pressure enroute to the low pressure side of things, those bubbles will return to their natural (possibly large) size.

Much better to get shot of any air and have good, airless fuel going into the high pressure pump.

[Hydrostream]

Jon, yeah thats what I figured and thats why I sugested running back to the tank if you only have one tank. Although this is the way I have it set up on our cat and have never had an issue. The right way would be a buffer tank low pressure pumps and an EFI pump but theres too many electrcs there, ad the more pumps you have the more links in the chain to break!

Mike, we are doing ok with the old 1900, hopefully starting another in the next few weeks, if we get through some work! How r u getting on with ur plans? If it works out stay in contact as their may be some developments by then here!

Alan