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You want to go here first. MEP-802A MEP-803A Filters and Parts | SteelSoldiers and this thread for more updated fuel line info. NOTE: there are fuel lines and fuel return lines. MEP-80x Fuel Return Line | SteelSoldiers

Howdy, Not so fast. You must have a 2008 or newer unit. It was around the 2008 and onward timeframe when they started using captive nuts. I know both my 2007 MEP-802A and 2007 MEP-803A do not have any captive nuts.

Howdy, Don't get to carried away. Older units do NOT have captive nuts. :cry: and its a real pain to get way up in the air cleaner area. I know for a fact my 2007 units do not have captive nuts. The 2009 units do. So somewhere in between they changed over to that nice captive nut style.

Howdy, You could start here MEP-802A MEP-803A Filters and Parts and the 2nd post has quick links. Being a 2010 unit, I would think it has caged nuts. Much easier taking the panels off. Not every single bolt has caged nuts, but lots are. Careful removing the hose from the TEE's. A careful...

Howdy, Yes, the 3.5mm stuff is what is factory. So, it goes right on top the barbs and stays on. No need for any clamping on the fuel return lines.

Howdy, FUEL RETURN LINE = very low pressure To each there own. I used the braided original style line. With keeping it filled with diesel #2 and not using JP8, it will last longer than the military fuel type use. The MEP-8xx series of generator all use diesel fuel return lines. After...

Howdy, MEP-8xx generators have fuel return lines. When you see the hoses weeping, you will want to replace the lines. This is the proper 3.5mm ID which pushes on the hose barbs and does not leak. I repeat = fuel return line... very low pressure line which goes back to the fuel tank.

Howdy, It seems to be one of the reasons to see fuel on and around the engine compartment. The fuel return line is simple to change out.

Howdy, The MEP-8xx series of generator all use diesel fuel return lines. After sometimes sitting with no fuel, or heat cold, no-use etc... they start to fail. The main issue is the lines start weeping fuel. NSN 4720-01-483-6467 part N20353.5 HOSE,NONMETALLIC Name Value CROSS-SECTIONAL...

Howdy, I am talking about the fuel return line. Very low pressure braided fuel return line. The 3.5mm hose fits nicely on the tees and connectors and stays tight.

Howdy, What product? from where? The CRP N203535-5 CONTITECH Diesel Hose is the new bio-diesel capable hose. In the VW, Mercedes world, it is also known as the yellow stripe diesel fuel return hose. Yes, rubber fails over time. But, non-use hurts rubber also. Either way, I now have all new...

Howdy, The MEP-8xx series of generator all use diesel fuel return lines. After sometimes sitting with no fuel, or heat cold, no-use etc... they start to fail. The main issue is the lines start weeping fuel. NSN 4720-01-483-6467 part N20353.5 HOSE,NONMETALLIC Name Value CROSS-SECTIONAL...

Howdy, The manual. NSN 4720-01-483-6467 part N20353.5 HOSE,NONMETALLIC Name Value CROSS-SECTIONAL SHAPE STYLE ROUND INSIDE DIAMETER 3.5 MILLIMETERS NOMINAL LAYER COMPOSITION AND LOCATION OUTER LAYER BRAIDED COTTON CORD INSIDE SURFACE CONDITION SMOOTH SPECIAL FEATURES COMES IN A...

Howdy, Most (guessing here) European diesel engines use the same stuff. Volkswagen 3.5mm ID fuel hose Mercedes 3.5mm ID fuel hose, and I am sure there are others. This is the name I found it under; Mercedes VW Diesel Fuel Injector Cloth Braid Hose 3.5mm ID

Howdy, Both MEP-802A and MEP-803A series fuel return line is 3.5mm ID and total usage is about 10 feet. NSN 4720-01-483-6467 part N20353.5 HOSE,NONMETALLIC The manual just calls to make from bulk 503-1052. The only thing which I would suggest is the best grade of fuel line which you want to...

Howdy, Good timing. My MEP-803a is showing signs of the original braided fuel return line is weeping. I will be replacing all the fuel return lines and tees.