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Petrol question re lawnmower

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1jim
1jim Posts: 2,663 Forumite
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Hi
We have just bought a petrol Lawnmower from eBay to use on the allotment, we have a 5L petrol can (the plastic green one) in the garage that is almost full with petrol from last summer, do you think it will be ok to use this in the mower? If not what should we do with the petrol ?
Cheers
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  • ariba10
    ariba10 Posts: 5,432 Forumite
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    I would use it.

    (Does it run on petrol alone or is it a
    Two stroke)
    I used to be indecisive but now I am not sure.
  • marleyboy
    marleyboy Posts: 16,698 Forumite
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    The general consensus is that petrol does go off after a year or so.
    :A:dance:1+1+1=1:dance::A
    "Marleyboy you are a legend!"
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  • peter_the_piper
    peter_the_piper Posts: 30,268 Forumite
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    edited 25 August 2012 at 8:48PM
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    Don't use it in any small appliance, stick it in the car and get fresh for the mower.

    Word of explaination:- in mower/strimmer etc carburettors all the orifices and jets are very much smaller than in a car one so if the petrol is old and gets thicker it will not pass through into the engine. This gets even worse with two stroke engines. Very difficult to clean out, even ultrasonic baths do not work in some, like my Honda strimmer before I knew better, one new carb. later and it was ok again. An expensive lesson.
    I'd rather be an Optimist and be proved wrong than a Pessimist and be proved right.
  • marleyboy
    marleyboy Posts: 16,698 Forumite
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    http://sciencefocus.com/qa/do-petroleum-products-petrol-and-diesel-have-shelf-life
    Petrol goes ‘stale’ more quickly than diesel – impurities and condensation in the tank can cause the fuel to go slimy if you leave it for more than a couple of months. But because diesel is less refined and more oily, it can last quite happily for a couple of years.
    :A:dance:1+1+1=1:dance::A
    "Marleyboy you are a legend!"
    MarleyBoy "You are the Greatest"
    Marleyboy You Are A Legend!
    Marleyboy speaks sense
    marleyboy (total legend)
    Marleyboy - You are, indeed, a legend.
  • 1jim
    1jim Posts: 2,663 Forumite
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    Mower is unleaded, not 2stroke

    So shouldn't use it then,

    Will it be ok in the car then, don't want any issues with the car if it can be helped :-)
  • A._Badger
    A._Badger Posts: 5,855 Forumite
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    My (ancient) mower has a Briggs and Stratton engine worth about, oh, I dunno 10p? My car as an engine worth thousands.

    I always use last year's left over petrol in the mower.
  • justjohn
    justjohn Posts: 2,260 Forumite
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    ye but good chance that Briggs and Stratton engine will outlast you, if looked after lol

    Now the car, thats a different matter lol
  • 1jim
    1jim Posts: 2,663 Forumite
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    See, now I'm just confused
    I think I will buy a new container and get some fresh petrol.

    How can I get rid of the old petrol?
  • roddydogs
    roddydogs Posts: 7,478 Forumite
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    Never had any problem using "Old Petrol" in a mower...its a 150cc side valve.
    Wouldnt muck about putting it in my car.
  • skivenov
    skivenov Posts: 2,204 Forumite
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    Don't use it in any small appliance, stick it in the car and get fresh for the mower.

    Yeah, the main worries that the petrol will have taken in moisture from the air trapped in the can. In a car-sized tank, this will be next to nothing when it's been diluted down with the fresh petrol that's in there already.

    If you want to throw it away - bring it round and I'll let you pour it in my tank :D My old transit's quite happy to have a couple of gallons of petrol out of a scrap car lobbed in it's diesel tank (don't do this on a modern vehicle though!).
    Yes it's overwhelming, but what else can we do?
    Get jobs in offices and wake up for the morning commute?
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