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Author Topic: Fuel return nozzle leak  (Read 923 times)

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Dadog13

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Fuel return nozzle leak
« on: March 01, 2022, 03:39:03 am »
Hi all,
Had my tank off for a while and now on install I have a leak from the fuel return nozzle (bottom of fuel pump) around the nozzle base before pipe joint.
It had some slight movement before taking off so hasn’t changed.
Does the fuel system need to be primed and full of fuel before nozzle makes a seal or is there damage?
Any one else had this problem.
L-shape connector in pic
Thanks all

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graeme

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Re: Fuel return nozzle leak
« Reply #1 on: March 05, 2022, 01:47:58 am »
Hi all,
Had my tank off for a while and now on install I have a leak from the fuel return nozzle (bottom of fuel pump) around the nozzle base before pipe joint.
It had some slight movement before taking off so hasn’t changed.
Does the fuel system need to be primed and full of fuel before nozzle makes a seal or is there damage?
Any one else had this problem.
L-shape connector in pic
Thanks all

Gidday DD, thinking the forum was dead but not quite.  Yes and no to having that problem. No to the system needing to be primed to assisting the sealing.  Return line is lowish pressure and a simple barb fitting so shouldnt be a problem to seal, you do have to be a bit carefull that it is not being kinked when you seat the tank fully home. Is it spit at join?
Did have an issue a few years back when I had refitted the supply line, gone for a dyno run, ridden at Phillip Island then went for a short ride from home only to have that line pop off and drain the tank while riding and rear tyre sliding around, just got home as tank emptied. So watch that the supply line is on fully and that the connector has clicked into place.
cheers Graeme
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Dadog13

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Re: Fuel return nozzle leak
« Reply #2 on: March 09, 2022, 05:30:56 am »
Cheers

Jota

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Re: Fuel return nozzle leak
« Reply #3 on: March 09, 2022, 10:17:04 pm »
Hi Mate, I've had no issues at all with the return line. Its a bit tight under there so make sure the hose is pressed home fully and as Graeme says not split. Its low pressure so should be an easy fix. My problems have been with the pressure supply side. The high pressure supply side has snap on connectors which can be a bugger to undo. I butchered the one on the underside of the tank and had to replace it. The fittings are Yamaha specific and expensive so be patient with them.  Cheers  Steve

Saint Rob

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Re: Fuel return nozzle leak
« Reply #4 on: March 09, 2022, 10:48:55 pm »
Hi all,
Had my tank off for a while and now on install I have a leak from the fuel return nozzle (bottom of fuel pump) around the nozzle base before pipe joint.
It had some slight movement before taking off so hasn’t changed.
Does the fuel system need to be primed and full of fuel before nozzle makes a seal or is there damage?
Any one else had this problem.
L-shape connector in pic
Thanks all

Gidday DD, thinking the forum was dead but not quite.  Yes and no to having that problem. No to the system needing to be primed to assisting the sealing.  Return line is lowish pressure and a simple barb fitting so shouldnt be a problem to seal, you do have to be a bit carefull that it is not being kinked when you seat the tank fully home. Is it spit at join?
Did have an issue a few years back when I had refitted the supply line, gone for a dyno run, ridden at Phillip Island then went for a short ride from home only to have that line pop off and drain the tank while riding and rear tyre sliding around, just got home as tank emptied. So watch that the supply line is on fully and that the connector has clicked into place.
cheers Graeme
I had the same problem as Graeme, after having the tank off one day I replaced it and went out for a ride with no problems doing quite a few miles. Next day went out again and after 3 or 4 miles thought I had a rear puncture because it was moving around all over the place. I pulled over and could smell petrol and saw all the smoke, hit the kill switch and got off bloody quick, I really thought it was going to go up in flames. Turning the key on again after it had cooled down I could see the fuel spraying out all over the place and could just about see that the connection had blown off. An easy fix but that connection is a pain, whether it’s getting it off or putting back on.