| Author |
Message |
    
Mike Rogers
New member
Username: d00425
Post Number: 1
Registered: 06-2009
| | Posted on Monday, June 15, 2009 - 09:04 am: | 
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I have a 5.0 Volvo Penta with 125 hours. It will run at planeing speed for 5-15 min. and then lose power as though it's running out of gas. At low rpm it will be run rough for about a minute and smooth out at which time I can resume at a planeing speed for awhile. Most recently I have also noticed a whining noise when this happens and I slow down which will go away in a short time.
Can you tell me what I might be able to do to correct. I would guess a fuel delivery issue, filter? or fuel pump? |
Mike
Advanced Member
Username: mike77cj
Post Number: 362
Registered: 06-2007
| | Posted on Monday, June 22, 2009 - 03:16 pm: |
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Fill a jerry jug with fuel and bypass the tank on your boat. This will rule out a stuck anti-syphon valve.
What year is the engine?
When did you last change / inspect your fuel filter? |
Mike Rogers
New member
Username: d00425
Post Number: 2
Registered: 06-2009
| | Posted on Wednesday, July 01, 2009 - 02:45 pm: |
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Mike,
After replacing the fuel filter the boat ran much longer, over an hour, before the symptom reappeared. Although it was slowing and then surging I was able to stay on plane. I thought that I would try another new filter.
Do you know the location and accessibility of the anti siphon valve? Can it be easily inspected/cleaned or replaced. I would prefer not to try the "jerry jug" approach, especially when the problem may take awhile to reoccur.
Thanks |
Robert A. Fierro
Advanced Member
Username: sandkicker
Post Number: 656
Registered: 06-2008
| | Posted on Wednesday, July 01, 2009 - 02:52 pm: |
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RE: " After replacing the fuel filter the boat ran much longer, over an hour, "
Sounds like water in the fuel... You can save yourself some $$$, if you just drain the fuel filter into a glass jar (wait a few mins to see if water separates out) and reinstall the filter.
Be careful that it reseals and does not leak. |
Mike Rogers
New member
Username: d00425
Post Number: 3
Registered: 06-2009
| | Posted on Wednesday, July 01, 2009 - 04:20 pm: |
|
Robert,
Thank you.
I have already put on another filter and did exactly as you suggested in the process. I did not observe any water in the fuel drained from the filter.
I had also added a can of sea foam and am thinking about another as well. What do you think? |
