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Old 12-12-2012, 04:21 PM
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Default 05 yamaha f150 wont start HELP!!

Hey Guys, My starboard 2005 yamaha f150 will crank over but not start. It was making a little belt squeak while trolling, so i turned it off while fishing. When it was time to run in, I fired it up with a faint squeak (sounds like a belt or bearing but very speratic. As i throttled up it went away so i figured it had something to do with low rpms. Ran fine on the way in and as I throttled back coming in the inlet motor stalled and now wont start. I checked plugs and oil all looked normal, along with filters. Sounds like it has no problem getting fuel, just no fire.
IDEAS????
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Old 12-12-2012, 05:07 PM
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motor has 950 hrs on it by the way
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Old 12-12-2012, 05:57 PM
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Did you check the fuel bulb? Could be a fuel restriction/pick up tube. Can you hear the high pressure fuel pump come on?
I always like to pull the plugs and set them against the block to make sure I have fire before going to other things.
Disconnect the kill switch to verify that's not it. Of course if you have one kill swich for both motors that shouldn't be it.
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Old 12-12-2012, 06:01 PM
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I'm no mechanic, but on my 2005 F150, a short on a bad water pressure sensor ("WPS") caused low voltages throughout the system, notably on the throttle position sensor ("TPS") which killed the motor. My solution was to disconnect the harness to the WPS, remove it, and plug the hole. We kept swapping parts from the good motor, including the ECU, to troubleshoot the low voltage readings on the bad motor. Final result was no new parts required. You'll probably need a pretty sharp tech to figure all this out if that's your problem. Hope this helps.
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Old 12-12-2012, 06:05 PM
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Is your electric fuel pump working for a few seconds when you key on? Make certain your getting spark. You can also check your mechanical timing on the timing belt (could have slipped/stripped out and got your mechanical timing off).
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Old 12-12-2012, 07:15 PM
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Sounds like the F150 vapor lock issue. It's been discussed on this site before. Yamaha has a parts kit to fix the problem.
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Old 12-13-2012, 04:32 AM
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If it's vapor lock it will start fine once the motor has cooled down. I had a high pressure fuel pump go out on my 05 f150 which is in the VST. Pull the engine cover and go back to the motor and have someone turn the key to on (not start). You should hear the fuel pump run for about 3 seconds. If you don't hear that its the fuel pump which is inside the VST tank which is under the intake on the starboard side. If the bulb is pumped up and the pump is running the motor should start and at least fire, even if filters need changing.

If it's electrical I'm not sure.......Is there spark when you checked plugs?
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Old 12-13-2012, 07:41 AM
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Couple of Q's:

1. When it died did it die instantly? or did it kind of sputter, surge and finally kill?

2. Did you hear any warning horns or see any flashing warnings on the digital tach?

3. What do you hear when you turn the key to "on" position?

4. What do you hear when you turn key to "start" position?

I think you possibly have a bushing squeal you are hearing at low rpm (very common) which is most likely unrelated to your engine starting btw.

-Rob
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Old 12-13-2012, 02:17 PM
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I will check and see tonight thanks for the replies I will def keep you guys in the loop. High pressure fuel pump has my vote as well, but I def think that bushing needs to be looked at too. I think I have (2) issues that strangely happened on the same day!!! Motors have been flawless none the less
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Old 12-13-2012, 05:42 PM
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checked high pressure fuel pump and it powers on and sounds the same as the good port motor so i think the high pressure fuel pump is ok. When I turn the key to run on the bad motor nothing flashes i.e low oil or over heating, but it does keep beeping like its trying to tell me something. When i turn the good motor to run it beeps as normal and then stops
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Old 12-13-2012, 05:55 PM
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Does it only beep in neutral?????

Is there a wire coming off the bottom of the ENGINE MOUNTED fuel filter (on front ((bow)) side of engine) ?

Water in fuel my brother.

If so just loosen it dump it out, prime w/ known good fuel and run it.

Check your racor's if that's the case.

-Rob
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Old 12-14-2012, 07:34 AM
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Quote:
Originally Posted by dward View Post
... I had a high pressure fuel pump go out on my 05 f150 which is in the VST...
Is the High Pressure Fuel Pump one of those?
18 63P-13907-02-00 FUEL PUMP COMP.
18 63P-13907-03-00 FUEL PUMP COMP.

in this drawing
http://www.boats.net/parts/search/Ya...201/parts.html

thanks
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Old 01-06-2013, 06:37 PM
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Update on the motor today. We thought it may be the tensioner on the timing belt so we replaced it and moved the timing belt over and wahlaa started first shot. Good right??? wrong the belt jumped right back off after a small run time and had a bad wobble in it. Like the cam shaft was bent. We pulled the heads off to find the cam shafts straight but the bearings shot so it looks like the motor needs a cylinder head. We checked compression in all 4 cylinders and it was great so I am assuming cylinders and bock are ok. Anybody have any other suggestions of checking anything else. Motors are 05's so I went ahead and am going to replace balancers. Does anyone do remans on the cylinder heads. Any suggestions would be great on anything else I need to check. It doesnt seem like the powerhead needs replacing. I hope
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Old 01-07-2013, 07:53 AM
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Prices for new yamaha cylinder head has been ranging from 1900 to 2400 any remanufactured ones out there?
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Old 01-07-2013, 08:19 AM
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The bearings are not insert type. Part of the head structure itself forms the bearings. Not the brightest idea in the world but that is the way that it is.

I am not aware of anyone being able to remanufacture a head of this type. It is a remove and replace world.
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Old 01-07-2013, 10:24 AM
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Compression was good on all 4 cylinders. Is this issue in direct connection with the balancer issue on these motors. Should I be worried about a bad cylinder even with a good compression test or should a new cylinder head and new balancer be the end of my problems . Haven't heard too much of this issue before?
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Old 01-09-2013, 04:49 PM
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Ok so we took the balancer off and 1 wheel was completely blown apart (plastic pieces not metal). Cylinders look good, crank shaft looks good. Don't know where I should go from here.... Replace the valves and cam shafts along with new oil pump and just clean everything or put a new powerhead on. THIS SUCKS!!!
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