Generator - Running out of fuel





Results 1 to 15 of 15
  1. #1
    Join Date
    Mar 2016
    Location
    Durbanville, Cape Town
    Age
    48
    Posts
    159
    Thanked: 27

    Default Generator - Running out of fuel

    Hi guys
    I've read that a generator can lose its magnetism if allowed to run out of fuel while connected to a load.

    I am just wondering if this is true or not - internet being full of fake news and all.
    If so I will have to manage the tank level more closely than I have been doing.

    I am hoping the AVR would disconnect the load if the revs drop, but maybe that is just wishful thinking.

    Thanks
    Last edited by BuckRogers; 2020/02/20 at 04:02 PM.

  2. #2
    Join Date
    Jan 2012
    Location
    King Williams Town
    Age
    52
    Posts
    7,378
    Thanked: 969

    Default Re: Generator - Running out of fuel

    Our work 5kva generators have run out of fuel on site during a standby with a load. Filled up and started again, everything carried on working.
    Isuzu STD 2.5d 2x4 rear diffy lock
    2x spotlight,2x fog lights
    215/80/R15c tyres
    1 x great humourous driver
    GPS,Bluetooth
    Eagle eye dash cam --stolen ..bought another one
    snorkel soon
    Craig
    I DON'T LIVE IN AFRICA,AFRICA LIVES IN ME- Kyle my son

  3. #3
    Join Date
    Oct 2009
    Location
    Stellenbosch
    Age
    69
    Posts
    3,964
    Thanked: 516

    Default Re: Generator - Running out of fuel

    Quote Originally Posted by BuckRogers View Post
    Hi guys
    I've read that a generator can lose its magnetism if allowed to run out of fuel while connected to a load.

    I am just wondering if this is true or not - internet being full of fake news and all.
    If so I will have to manage the tank level more closely than I have been doing.

    I am hoping the AVR would disconnect the load if the revs drop, but maybe that is just wishful thinking.

    Thanks
    Pretty sure that is nonsense story.
    Simply shutting the fuel tap is a useful way of stopping a petrol genny.
    Eggie.

    What this country needs more and more, are more unemployed politicians.
    - apology to Edward Langley.

  4. The Following 3 Users Say Thank You to Eggie For This Useful Post:


  5. #4
    Join Date
    Jan 2012
    Location
    King Williams Town
    Age
    52
    Posts
    7,378
    Thanked: 969

    Default Re: Generator - Running out of fuel

    Quote Originally Posted by Eggie View Post
    Pretty sure that is nonsense story.
    Simply shutting the fuel tap is a useful way of stopping a petrol genny.
    We were told to shut the fuel tap off so as to run the carb dry, this prevented the fuel drying up and leaving resin Or what ever the mechanic calls it behind. Thus causing problems at a later date.
    Isuzu STD 2.5d 2x4 rear diffy lock
    2x spotlight,2x fog lights
    215/80/R15c tyres
    1 x great humourous driver
    GPS,Bluetooth
    Eagle eye dash cam --stolen ..bought another one
    snorkel soon
    Craig
    I DON'T LIVE IN AFRICA,AFRICA LIVES IN ME- Kyle my son

  6. #5
    Join Date
    Dec 2015
    Location
    Cape Town
    Age
    46
    Posts
    64
    Thanked: 26

    Default Re: Generator - Running out of fuel

    I have lost count of how many times my Honda genny has run out of fuel while under load.

  7. #6
    Join Date
    Sep 2009
    Location
    Bloemfontein
    Age
    43
    Posts
    6,284
    Thanked: 432

    Default Re: Generator - Running out of fuel

    On the big diesel genies you can burn the starter out if it runs out of fuel..I actually wonder if the newer models save the starter by shutting down rather than to keep trying to start

  8. #7
    Join Date
    Sep 2006
    Location
    Oppierotse
    Age
    56
    Posts
    1,740
    Thanked: 243

    Default Re: Generator - Running out of fuel

    Quote Originally Posted by BuckRogers View Post
    Hi guys
    I've read that a generator can lose its magnetism if allowed to run out of fuel while connected to a load.
    Old car generators and even alternators lost their magnetism if not used for a long time. You simply "excite" them with a 12v battery ,and they worked again.
    The same could possibly happen to a AC generator from standing to long, but I doubt it very much that it can be from running out of fuel under load.
    If it does, then you can excite the windings again.
    98 Hilux 2.8D D/C 4x4

  9. #8
    Join Date
    Jan 2015
    Location
    Vredenburg
    Age
    42
    Posts
    2,735
    Thanked: 940

    Default Re: Generator - Running out of fuel

    Quote Originally Posted by wiel View Post
    Old car generators and even alternators lost their magnetism if not used for a long time. You simply "excite" them with a 12v battery ,and they worked again.
    The same could possibly happen to a AC generator from standing to long, but I doubt it very much that it can be from running out of fuel under load.
    If it does, then you can excite the windings again.
    Thanks.
    That is quite interesting to know.
    I thought it was just BS.

  10. #9
    Join Date
    Sep 2014
    Location
    Pretoria
    Age
    61
    Posts
    172
    Thanked: 37

    Default Re: Generator - Running out of fuel

    Quote Originally Posted by hunter26 View Post
    We were told to shut the fuel tap off so as to run the carb dry, this prevented the fuel drying up and leaving resin Or what ever the mechanic calls it behind. Thus causing problems at a later date.
    The way things are now you can leave the tap open in order to get the gennie to start immediately

  11. #10
    Join Date
    Apr 2013
    Location
    Pretoria
    Age
    35
    Posts
    828
    Thanked: 124

    Default Re: Generator - Running out of fuel

    I have also heard of it happening but it is an easy fix apparently. On youtube there are lots of videos of how to excite it by using a drilling machine. Like so:

    https://youtu.be/-LR62sm7USU

  12. #11
    Join Date
    Mar 2016
    Location
    Durbanville, Cape Town
    Age
    48
    Posts
    159
    Thanked: 27

    Default Re: Generator - Running out of fuel

    Quote Originally Posted by Tony Knipe View Post
    I have lost count of how many times my Honda genny has run out of fuel while under load.
    And the attached appliances do not suffer any damage ?

  13. #12
    Join Date
    Mar 2014
    Location
    Joburg
    Age
    48
    Posts
    138
    Thanked: 56

    Default Re: Generator - Running out of fuel

    Utter BS.

    If the gen has a electronic AVR they have a under frequency protection. If the engine speed drops below a certain number the power to the exciter coil get cut and the alternator no longer has a output.

  14. The Following 2 Users Say Thank You to Geiler Keiler For This Useful Post:


  15. #13
    Join Date
    Oct 2011
    Location
    Earth
    Age
    41
    Posts
    2,771
    Thanked: 1941

    Default Re: Generator - Running out of fuel

    I also disconnect anything using power and then close the fuel tap each time I stop using my Generator
    And this on small cheap one without AVR and it works fine
    2007 Subaru Forester 2.5XT
    Forester nutter here so watch out

    Please remember that I think I'm funny
    (most people don't agree)
    thus take 90% of what I post with 2 pinches of salt

  16. #14
    Join Date
    Sep 2008
    Location
    Vanderbijlpark
    Age
    50
    Posts
    1,814
    Thanked: 180

    Default Re: Generator - Running out of fuel

    Nope, no risk. I also let my petrol gen run out of fuel by closing the tap, obviously I first disconnect the load.
    ZS6VL


  17. #15
    Join Date
    Feb 2009
    Location
    Centurion, Pretoria, SA
    Age
    67
    Posts
    1,214
    Thanked: 338

    Default Re: Generator - Running out of fuel

    In days before solar we would fill the Honda genny with fuel and go out for the day. It would eventually run out of fuel at about 4.00 pm and freezers would run on 12V system. Come back refuel and start up again, day after day. Never had a problem.
    SOMETIMES I WAKE UP GRUMPY,
    SOMETIMES I JUST LET HER SLEEP!

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •