Are these fuel lines connected correctly?

91 250c, bought at auction last year. Was running great, but recently started slowly stalling after it warms up. I ve replaced the filters and tank valve. I ve also put clear lines in to see if there s air getting in the lines somewhere, nada.

When putting in the clear lines I saw something weird. There are two inlets on the filter, to outlets. One inlet is connected to the tank, normal. The other inlet is connected to the back of the injection pump. One outlet is connected to the side of the injection pump.

Shouldn t the back of the pump be connected to the other outlet?

Hard to see the line in these photos. The one in question is on the back side of the black hose going into the filter on the left side. Note the capped outlet as well.

mvphoto35189.jpg


mvphoto35190.jpg
 
It's hard to tell from your pics, however based on your description it's clearly wrong. The back of the pump
is the pump inlet, or supply, and needs to be connected to an outlet of the filter.

The attached diagram may be of some help.
Lines
 
Right, no primer. Didn t get to it this weekend, hopefully the next day or two. I wonder how it was working before...
 
Question is if this could cause the engine to stall once I warms up. Maybe the inlet the pump is connected to can t provide enough fuel?
 

Sometimes the fittings on one side are not the same, both fittings near the tank may no be inlets and both fittings near the inj pump may not be outlets.
Each fitting has a arrow on the filter base that tells the direction of fuel flow.
 

Your outlet line to the side of the pump goes on the other outlet port and the outlet port you're using goes to the back of the pump. From the front. Left port to the back of the pump. Right port to the side of the pump.
 

The rear filter doesn't look like anything I've seen before, for what it's worth. You might replace that filter with one like smaller/shorter one.
 
Interesting! That's the ones the New Holland dealer told me to put on. I guess the bowl is too hard to find for them now.
 

Ah, great info. That's what I thought from the diagram.

I did some messing with it this morning. Now I have the one inlet coming from the fuel tank. In the photos, that'd be the left back inlet. The left front inlet is now blocked off.

I have it as the right back outlet is to the side of the pump and the right front is to the back of the pump, but sounds like I need to switch those two. Might not be that big of a deal.

Good news is that I was able to make 2 loops around the field today (5 acres) with the brush mower. Before I was only making about 3/4 of the way before it bogged down. I ran out of time, but that's an early sign of success. It still sounded a little rough, but it's been a while since I've heard it sound good I could just be hearing things. Or maybe switching those lines will clear it up.
 
I was able to make 2 loops around the field today (5 acres) with the brush mower. Before I was only making about 3/4 of the way before it bogged down. It still sounded a little rough, but it's been a while since I've heard it sound good I could just be hearing things.

Your fuel line into the filter body looks a little kinked. Hope you have good fuel flow through the bend. I don't think it matters, but I believe the inlet line was installed in the inside (closest to engine block) inlet hole at the factory.

You didn't mention your fuel return line. Hope it's open and flowing freely. Those 3 cylinders don't run well when the fuel return line is suffering from a restriction or blockage.
 
(quoted from post at 22:59:05 04/30/19)
I was able to make 2 loops around the field today (5 acres) with the brush mower. Before I was only making about 3/4 of the way before it bogged down. It still sounded a little rough, but it's been a while since I've heard it sound good I could just be hearing things.

Your fuel line into the filter body looks a little kinked. Hope you have good fuel flow through the bend. I don't think it matters, but I believe the inlet line was installed in the inside (closest to engine block) inlet hole at the factory.

You didn't mention your fuel return line. Hope it's open and flowing freely. Those 3 cylinders don't run well when the fuel return line is suffering from a restriction or blockage.

I redid that kinked line. It was rubbing on the battery tray post too. I moved that to the back inlet as well and blocked off the closest inlet.

Return lines are good. I put clear reinforced tube on there for now just so I could see what was going on there.

I ran it for an hour yesterday before it started raining. I m cautiously optimistic that it s fixed.
 

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