Xr6 losing fuel pressure (Help Wrench)

[aarchdale@coresleep.com]

Everything seemed right inside there unless you see somthing i dont.   I guess ill try a new fuel filter tomorrow even though the one on there is only a few months old

[aarchdale@coresleep.com]

Just to make sure i have the right parts

2004 Xr6  OT947291

This is the diaphram kit i put in it 857005A1

And this is the primer bulb   8m0061876

 

I did take the fuel line off just now from the pump and put a jug on the floor and gave it a couple pumps and it had a good gas stream flowing without pumping 

[fishinwrench]

Is it just the pic (reflection) or is the diaphragm all stretched out?   

 

[aarchdale@coresleep.com]

i think just the reflection, it seemed pretty tight

[aarchdale@coresleep.com]

Do any parts look like they are missing from that fuel pump?  I took it took a shop near me because i keep having the same issue and, the mechanic very arrogantly asked who had been in there working on it because it was missing parts.  I have been the only one, and i was hoping i made a simple mistake and it would be good. He put another new diaphragm kit in it, not the brand new mercury kit I told him was in the glove box. Went to the lake the next day and guess what....same exact problems, nothing has changed.    

Im just a little confused, If i left parts out would it have ran 20 miles with no problems the day after i rebuilt it?   I think it may be something with my pick up tube in the tank. But i can only get it so far out and the filter or whatever is on the end wont fit through the hole. Its a flexible hose so how do i know its ever actually sitting on the bottom

[fishinwrench]

You have to remove the fuel guage sender and work through that hole.  

But here's the deal.....If you can siphon freely from the fuel supply line, then all is well with the pickup tube assembly.   By "siphon freely" I don't mean that you can squeeze the bulb and squirt fuel out.....I mean that once fuel starts coming out it WILL KEEP COMING OUT as long as the end of the hose is below the fuel level in the tank.   

[aarchdale@coresleep.com]

I tried and cant see anything through that hole its like 2.5 inches. The sender is in the middle and the pick up hose is way over on the starboard side. sender hole and pick up hole are 2 feet apart.  It definitely will siphon freely, i drained a gallon out down by the lower unit..   

[aarchdale@coresleep.com]

I cant repeat the problem on muffs or the place that worked on it has a pond they back into, it only becomes a problem later in the day.   IT starts perfect in the morning and from spot to spot fires right up, always in the afternoon when it happens

 

[fishinwrench]

53 minutes ago, aarchdale@coresleep.com said:

I cant repeat the problem on muffs or the place that worked on it has a pond they back into, it only becomes a problem later in the day.   IT starts perfect in the morning and from spot to spot fires right up, always in the afternoon when it happens

 

I get those "it does it sometimes" jobs in here occasionally.  I hate them SOMETIMES 😅

Other times I can look things over, do a few tests, make a simple adjustment, and it never happens again.  

Yours, from how you've described it, sure sounds like a fuel delivery issue.....but fuel delivery issues don't ordinarily care what time of day it is.   They can care how much fuel is in the tank though (pin hole or crack in the pickup tube), and there may be a pattern there that relates to the level of fuel in the tank.   

[fishinwrench]

59 minutes ago, aarchdale@coresleep.com said:

I tried and cant see anything through that hole its like 2.5 inches. The sender is in the middle and the pick up hose is way over on the starboard side. sender hole and pick up hole are 2 feet apart.  It definitely will siphon freely, i drained a gallon out down by the lower unit..   

Well how the hell do you suppose they put the screen on the end of the pickup tube? 🤔 

Beg, borrow, or steal a remote 6 gal. tank and run it on THAT for a day to see if it still happens.