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2006 Yamaha F150TXR Low Pressure Fuel Pump Problem?

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2006 Yamaha F150TXR Low Pressure Fuel Pump Problem?

Old 09-10-2018, 04:45 PM
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Default 2006 Yamaha F150TXR Low Pressure Fuel Pump Problem?

2006 F150TXR with 420 hours - the VST tank and filter were serviced 1yr/100hours ago, also replaced the injectors at that time and all other 100hr service requirements.

A couple of weeks ago engine started cutting out at 5200 RPM, dropping to ~3400 RPM and has gotten progressively worse to the point of cutting out at 2500 RPM. When I pump the fuel bulb, it seems to help.

I tried running the engine with the fuel fill cap open and ran it on a new portable 5 gal tank - they symptoms remain the same.

I'm thinking this could be a low pressure fuel pump issue - could I check the input line vacuum pressure or check the output line pressure or check the output volume of fuel pumped for say 1 minute to determine if the pump is working up to specs?

Anybody know what the input/output specs are for the FUEL PUMP ASSEMBLY 63P-24410-20-00?

Thanks in advance for any suggestions.

Last edited by DaveHNL; 09-10-2018 at 05:57 PM.
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Old 09-10-2018, 05:14 PM
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I have an 05 F150. In your service manual there is a pressure test procedure for your fuel pumps. Basically you pressure the outlet check valve, and vacuum against the inlet check valve to be sure they are holding. If you have or can borrow a Mitivac or equivalent it is an easy test to do. The test is a little hinkey because all check valves leak off at least a little bit. But it'll definitely tell you if you have a gross failure.

When mine went out pumping the bulb took care of the problem as by pumping the bulb you are pushing gas past the low pressure pumps.

Ten years+ life out of those internal elastomer (rubber) components was pretty good when I thought about it. So you may be "due".

Also, be sure your last chance filter is sealing good. They do come unscrewed sometimes, in spite of the locking mechanism (at least mine did once). That filter housing seals with an o-ring so if the o-ring has failed that can also be an issue because it will draw air.

When I replaced my fuel pumps SIM Yamaha told me that Yamaha does not make a rebuild kit available, which IMO is stupid. Had to buy two new pumps and $400 later I was back in business.

Last edited by JiminAZ; 09-10-2018 at 05:20 PM.
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Old 09-10-2018, 05:25 PM
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Originally Posted by JiminAZ View Post
I have an 05 F150. In your service manual there is a pressure test procedure for your fuel pumps. Basically you pressure the outlet check valve, and vacuum against the inlet check valve to be sure they are holding. If you have or can borrow a Mitivac or equivalent it is an easy test to do. The test is a little hinkey because all check valves leak off at least a little bit. But it'll definitely tell you if you have a gross failure.

When mine went out pumping the bulb took care of the problem as by pumping the bulb you are pushing gas past the low pressure pumps.

Ten years+ life out of those internal elastomer (rubber) components was pretty good when I thought about it. So you may be "due".

Also, be sure your last chance filter is sealing good. They do come unscrewed sometimes, in spite of the locking mechanism (at least mine did once). That filter housing seals with an o-ring so if the o-ring has failed that can also be an issue because it will draw air.

When I replaced my fuel pumps SIM Yamaha told me that Yamaha does not make a rebuild kit available, which IMO is stupid. Had to buy two new pumps and $400 later I was back in business.
You replaced your low pressure pumps? There are parts available to “rebuild” Replaced my diaphragms last year. All the parts are available. No kit designated by a part number however.
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Old 09-10-2018, 05:28 PM
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Originally Posted by pstephens46 View Post


You replaced your low pressure pumps? There are parts available to “rebuild” Replaced my diaphragms last year. All the parts are available. No kit designated by a part number however.
SIM told me that Yamaha did not make those parts available. I had the drawings up on my computer, parts did not show in stock. Called them up and told them which parts I needed and nogo.

I figured it would be a routine transaction - I needed a diaphragm, couple check valves, and a couple O-rings per the drawings IIRC.
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Old 09-10-2018, 05:50 PM
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Originally Posted by JiminAZ View Post
SIM told me that Yamaha did not make those parts available. I had the drawings up on my computer, parts did not show in stock. Called them up and told them which parts I needed and nogo.

I figured it would be a routine transaction - I needed a diaphragm, couple check valves, and a couple O-rings per the drawings IIRC.

This is what I am seeing on Boats.net. I don’t know who you spoke with. I would guess not Andy. I post this for informational purposes versus just for sake of arguing.....


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Old 09-10-2018, 06:25 PM
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No argument here. If you can source the parts by all means save the money and do so. It's a very simple pump with expendable rubber internals.

I did go look, part 29 the diaphragm was available from boats.net and from SIM, but I don't even see the check valve components on this drawing. IIRC that's where things got hung up for me although it's been awhile since I did this job. Perhaps the checks are integral to part 31. By the time you buy 29 and 31 you're at about $114.

I did explore with SIM whether a rebuild kit was available, and also if I could buy the parts individually. I shouldn't have used the term "rebuild kit" above. Anyhow by all means buy the parts if you can get them.

Last edited by JiminAZ; 09-10-2018 at 06:33 PM.
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Old 09-10-2018, 07:35 PM
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Originally Posted by JiminAZ View Post
I have an 05 F150. In your service manual there is a pressure test procedure for your fuel pumps. Basically you pressure the outlet check valve, and vacuum against the inlet check valve to be sure they are holding. If you have or can borrow a Mitivac or equivalent it is an easy test to do. The test is a little hinkey because all check valves leak off at least a little bit. But it'll definitely tell you if you have a gross failure.

When mine went out pumping the bulb took care of the problem as by pumping the bulb you are pushing gas past the low pressure pumps.

Ten years+ life out of those internal elastomer (rubber) components was pretty good when I thought about it. So you may be "due".

Also, be sure your last chance filter is sealing good. They do come unscrewed sometimes, in spite of the locking mechanism (at least mine did once). That filter housing seals with an o-ring so if the o-ring has failed that can also be an issue because it will draw air.

When I replaced my fuel pumps SIM Yamaha told me that Yamaha does not make a rebuild kit available, which IMO is stupid. Had to buy two new pumps and $400 later I was back in business.
Thanks, I'll give the pressure test a try.
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Old 09-10-2018, 08:40 PM
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Originally Posted by JiminAZ View Post
No argument here. If you can source the parts by all means save the money and do so. It's a very simple pump with expendable rubber internals.

I did go look, part 29 the diaphragm was available from boats.net and from SIM, but I don't even see the check valve components on this drawing. IIRC that's where things got hung up for me although it's been awhile since I did this job. Perhaps the checks are integral to part 31. By the time you buy 29 and 31 you're at about $114.

I did explore with SIM whether a rebuild kit was available, and also if I could buy the parts individually. I shouldn't have used the term "rebuild kit" above. Anyhow by all means buy the parts if you can get them.
I think the check valves are built in part 31.
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Old 09-11-2018, 01:30 AM
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I would assume the plunger is the main “wear” part but I don’t know for sure. I replaced mine after ordering parts. Did not replace check valve pieces. The old plunger parts looked fine after removal.
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Old 09-11-2018, 02:39 PM
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Originally Posted by pstephens46 View Post
I would assume the plunger is the main “wear” part but I don’t know for sure. I replaced mine after ordering parts. Did not replace check valve pieces. The old plunger parts looked fine after removal.
How many hours/years did the motor have on it?

Thanks
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Old 10-07-2018, 06:07 PM
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DaveHNL did you ever get sorted out?
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Old 10-07-2018, 06:26 PM
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Originally Posted by JiminAZ View Post
DaveHNL did you ever get sorted out?
Yes, it turned out to be Part 16, Filter, Fuel 69j-24501-10-00. This was very clogged.

It was not the LP fuel pumps.
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