4104 671 Hard Starting

[TomC]

As Geoff said. My two spin on fuel filters are just below the check valve from the tank. You're plumbing should be-fuel line coming from the fuel tank, through the check valve high up on the engine compartment, through the primary fuel filter, then to the fuel pump, back to the secondary fuel filter, then to the cylinder head. You should be able to start the engine after weeks of sitting without problems. Good Luck, TomC

[luvrbus]

Seems wet around fuel pump....could be leaking seal at pump coming out of weep hole? Have you installed new pre-filled fuel filter? Was/ is the old filter full of fuel, or only partially full?

Wet is not a good sign on the fuel pump

[pennuja]

Seems wet around fuel pump....could be leaking seal at pump coming out of weep hole? Have you installed new pre-filled fuel filter? Was/ is the old filter full of fuel, or only partially full?

That is oil, I have a leak somewhere, I thought it was the breather tube, it was disconnected, but that wasn't it.

[pennuja]

Well I think I found the issue, and it was probably my fault.

Last night I changed the fuel filter and found that the o ring when it came off was very flattened, so maybe it is possible that I failed to change the small o ring the last time I changed the fuel filter or it was faulty which I doubt. This morning it started right up after siting all night and it has not done that on a long time.

I only have one filter after the pump, but I think I should install one before the pump? Should it be another spin on like I have?

[Edited to add] When I bought my bus it came with a Racor glass fuel filter and the replacement inside filters, this was removed when the line was replaced by the PO. Is it worth adding that before the fuel pump, I think that is where it was. Just wasn't sure if they were any good, I liked that you could see into it but other than that I don't know much about them.
[Edited to add]

Here is a pic of the o ring:

[busfan]

So you installed a new o ring and it started up? 

That one looks flat, thus your air theory. 

[pennuja]

So you installed a new o ring and it started up? 

That one looks flat, thus your air theory. 

That's it new filter and the two o rings.

[Jim Eh.]

Generally the oil filter O rings are square cut. Is it possible you ended up with someone's returned goods that had lost the original o ring and threw in a round one just so they could return it?