MEP 803a Auxiliary Fuel Connection

[Superfrank]

Hello Everyone,

New to the site and so much info on here. I bought a MEP 803a Generator. Very low hours completely gone through. Very happy with it and I'm trying to set up the auxiliary tank. I need to know a couple of things

1) what the fitting size on the generator itself?
2) What size fuel line should I run?

I plan on going from a 210 gallon aluminum tank, (guy built the wrong side for a yacht so I got a good deal), through a marine diesel fuel filter water separator and finally into the generator. I live in the country and we've lost power out here in the last 2 hurricanes once of 5 days and the second time for 9 days. Never again, I hope! It's set up with an SE rated auto switch and remote start board. Works like a champ! Runs the whole house no problem. AC, Water heater, lights, fans, stove/oven, TV & Internet. I just can't cook a turkey in the oven and dry clothes at the same time. Truly a rock solid unit! The fuel tank is also my filling station for my tractors.

Thanks for your help.

Frank

 

[antennaclimber]

Moved to proper forum.

 

[uniquify]

1) what the fitting size on the generator itself?
2) What size fuel line should I run?

The auxiliary fuel fitting on the generator is a -5AN fitting. You can also use a 5/16" JIC fitting since they are compatible.

I'd use a 5/16" fuel line personally, but 1/4" or 3/8" would probably work ok.

 

[Digger556]

Welcome to the site! And congrats on your purchase. It looks like you are getting it setup well.

Like Uniquify stated, the fitting is AN-5, which can be harder to source. Most race shops jump from -4 to -6. I just bought a bunch of -5 JIC fittings from www.discounthydraulichose.com/

Also +1 vote for 5/16" line unless you are running a long distance, then I would step up to 3/8".

 

[Light in the Dark]

Welcome to SS. As others have said, its an AN-5 (or 5/16 JIC in the aftermarket world). What fitting is on the tank, first and foremost? They make auxiliary fuel lines for these sets, so maybe you should use one of those, and just hook it up as needed (install an in-line valive to shut off fuel flow, so you can discontinue fuel line as needed)?

 

[Superfrank]

Thanks for the information guys. The tank has a 1/2" pipe thread hole so I can use pretty much whatever size fuel line I want I'll just need to get the appropriate fitting. I wanted to size the fuel line properly for the Aux. pump so I wasn't sure what to use. It's a short run probably 4' by the time I come out if the tank, to the filter and then back to the generator. I have some 1/4" stainless braided fuel line in the shop I was going to use if I could, is it too small? Should I go 3/8" or 5/16"? Thanks for the link to the hydraulic shop, and you're right I had a heck of a time finding AN-5 it was always AN-4 then up to AN-6.

Thanks again much appreciated!

 

[mijoe]

Hi All,

Has anyone modified a typical diesel fuel can to have a connector on the top that can be connected to the aux fuel inlet? On my personal 803, I have a jerry can and a barrel adapter that I use, but the actual jerry cans and barrel adapters are costly and not common in the US (official jerry cans are not EPA CARB compliant). I have been thinking about piecing together an adapter set like in the posts above, and then modifying a few fuel cans so that my elderly parents can use it with their 803. The thought was that they could have 9 gallons internal and 5 external, just moving a hose from one can to the next as needed. Has anyone already tried anything like this?

 

[Guyfang]

Start a "Parts Wanted" thread. This is what you need. Then the standard AUX fuel line.




NSN: 2910-00-066-1235
Adapter Assy, Fuel Drum
Part #: 13214E7541

 

[2Pbfeet]

Hi All,

Has anyone modified a typical diesel fuel can to have a connector on the top that can be connected to the aux fuel inlet? On my personal 803, I have a jerry can and a barrel adapter that I use, but the actual jerry cans and barrel adapters are costly and not common in the US (official jerry cans are not EPA CARB compliant). I have been thinking about piecing together an adapter set like in the posts above, and then modifying a few fuel cans so that my elderly parents can use it with their 803. The thought was that they could have 9 gallons internal and 5 external, just moving a hose from one can to the next as needed. Has anyone already tried anything like this?

If you are running NATO (Wavian type) style Jerry cans, these folks have one;

Jerry can adapter with fuel pipe

Jerry adapter with hose and fuel pipe, ideal for using with a Generator

www.lmslichfieldltd.com

Or it may give you ideas on how to make your own...

All the best,

2Pbfeet

 

[Light in the Dark]

This user can square you away with the whole package:

OH - New MFC Scepter fuel cans

New Sand color Scepter fuel can. Have never had fuel in them $80 plus shipping usually around $20 If you do not care for the price Don't buy them

www.steelsoldiers.com

OH - NEW MEP Fuel can/Bung Adapters

NEW in the box are the 5 gallon/55 gallon 2 inch bung adapters for use with Military Generators and other equipment. Price is $65 Dollars shipped. Lower 48 states only no international shipping. I accept Checks and Paypal friends and Family or cash if in person. More than 50 available Located...

www.steelsoldiers.com

 

[FarmingSmallKubota]

I have both instock brand new if you are looking to push the Easy Button.

 

[m32825]

I have both instock brand new if you are looking to push the Easy Button.

Looks like the 55 gallon bung adapter has a lever on top. Is that to lock it into the drum, or does it screw into the drum and that lever is some kind of valve?

 

[Light in the Dark]

It bows out the sealing edge. There is a small vent/bleed hole on this item, to equalize pressure draw as well.

 

[Guyfang]

It fits a 55 gal. drum AND a 5 Gal. Jerry can.

 

[m32825]

Any suggestions for an inline valve to prevent siphoning?

 

[Light in the Dark]

Well if you tie to a Jerry can, it'll probably empty it into the machine before that is a concern (with a 9 gallon tank on an 803, you might actually empty the tank before the high level pump shutoff is hit.. Which will make the pump run on and on and on).

 

[m32825]

Well if you tie to a Jerry can, it'll probably empty it into the machine before that is a concern (with a 9 gallon tank on an 803, you might actually empty the tank before the high level pump shutoff is hit.. Which will make the pump run on and on and on).

55 gallon drum with siphoning issues. Currently break suction at the bung fitting, but a valve would be more convenient. Thought I would check for a go to solution before reinventing the wheel (first time for everything).

 

[2Pbfeet]

55 gallon drum with siphoning issues. Currently break suction at the bung fitting, but a valve would be more convenient. Thought I would check for a go to solution before reinventing the wheel (first time for everything).

Bung vents?

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

There are also smaller versions that do bidirectional venting, but not all of those have flash back screens or mechanisms.

All the best,

2Pbfeet

 

[Toolslinger]

If you're just trying to stop the siphon, without loosing it, a ball valve with the correct JIC adapters in line with the hose. If you want to let the siphon go completely, then a JIC Tee of correct genders, and a valve on the tap that you can open to let the air in.

You could automate it with a solenoid that closed when the transfer pump runs, but that's getting more complicated than you probably want.