? RodBolt

[angler53]

What is the useful life of the yamaha 10-micron fuel/water separator filter?
Those selling them say 50 hours or three months. Those using them say once each year.
The reason I ask;
I have a 2005 F150TXR 63P with 85 total hours, all in the last nine months. It got a new powerhead at 15 hours and it turned 6000 rpm after break-in but fell off to 5500 without any changes. I raised the motor up one hole and it turned 6000 that one day of use. Then it was back in the 55/5600 range without any changes.
I took it to the dealer. They did the download and a leak down test. TPS values were within parameters. Compression is high with <5% leak down on all cylinders. They scheduled for a factory rep to come do a water test to check things they say they can't do, but that hasn't happened yet.
Weekend before last after an hour run to destination it failed to crank after being docked for an hour. I found the pump bulb soft and empty (the only time I ever touched it) and it would not pump up. It started and died a few times but I got it to crank after pumping the throttle. It ran fine the rest of the day.
Last weekend it started fine but quit when I put it in gear. I started it and let it run a while at 1000 rpm to warm and it ran great for the day.
I called the dealer and they say I may have a fuel pressure problem and therein may be the rpm problem.
Could it be so simple as a fuel/water filter?
Thanks for your time.

 

[rodbolt]

Re: ? RodBolt

find a real dealer.
there are no tests a yamaha RTA can run that they cannot, unless they simply dont have the diagnostic tools.
the fuel system in a box, sent to all dealers, can tell you in about 15 minutes if its a hull fuel system issue.
as far as filter life, depends on the amount or water/debris in the tank.
none at it lasts forever.
if the laptop says all is ok, guess what?
you just eliminated a whole bunch of tests.
as the fuel primer bulb is on the suction side of the pump it CANNOT stay hard.
the VST will hold enough fuel for several minutes of idle time with the fuel line dissconected.
has anyone tested fuel rail pressure at the trouble RPM? has anyone actually set the throttle linkage?
this is all stuff the RTA will do as most dealerships gundeck it.
your issue isnt mechanical, its most likly a fuel delivery issue.
what killed the first powerhead ?
odds are high its whats gonna kill the second.

 

[angler53]

Re: ? RodBolt

find a real dealer.
there are no tests a yamaha RTA can run that they cannot, unless they simply dont have the diagnostic tools.
the fuel system in a box, sent to all dealers, can tell you in about 15 minutes if its a hull fuel system issue.
as far as filter life, depends on the amount or water/debris in the tank.
none at it lasts forever.
if the laptop says all is ok, guess what?
you just eliminated a whole bunch of tests.
as the fuel primer bulb is on the suction side of the pump it CANNOT stay hard.
the VST will hold enough fuel for several minutes of idle time with the fuel line dissconected.
has anyone tested fuel rail pressure at the trouble RPM? has anyone actually set the throttle linkage?
this is all stuff the RTA will do as most dealerships gundeck it.
your issue isnt mechanical, its most likly a fuel delivery issue.
what killed the first powerhead ?
odds are high its whats gonna kill the second.

find a real dealer.

Ha! I think I'd have to start my own and hire you.

there are no tests a yamaha RTA can run that they cannot, unless they simply dont have the diagnostic tools.

I took it in by request of the RTA (thats a factory field tech, right?) to see why it wasn't turning up 6000 rpm. When they didn't find anything with the laptop and the compression was so good they wanted the RTA to do wot water test. Not really sure why they don't do this.

the fuel system in a box, sent to all dealers, can tell you in about 15 minutes if its a hull fuel system issue.
as far as filter life, depends on the amount or water/debris in the tank.
none at it lasts forever.

None of this has been done. When I took it in, there were no issues except not turning enough rpm.

if the laptop says all is ok, guess what?
you just eliminated a whole bunch of tests.

Points to hull system, huh.

as the fuel primer bulb is on the suction side of the pump it CANNOT stay hard.

This I know and until it failed to start, I never pumped the thing.

has anyone tested fuel rail pressure at the trouble RPM? has anyone actually set the throttle linkage?

No to the fuel rail test, not to my knowledge, anyway. They did check linkage, though.

your issue isnt mechanical, its most likly a fuel delivery issue.

Sounds logical to me.

what killed the first powerhead ?
odds are high its whats gonna kill the second.

Balance unit failed.