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Mountfield R28M Ride-on-Mower Mistake? Any tips..?

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  • sujsuj
    sujsuj Posts: 744 Forumite
    Fifth Anniversary 500 Posts Name Dropper
    The last time I made the mistake of tipping up my mower, the problem was that engine oil had got into the paper air filter. I just removed the fi!ter, cleaned up any excess oil, left it to stand for a while, fitted a new filter and started the mower. There was lots of smoke as oil had gone into the carburretor etc but after a few minutes it burnt off and ran normally.

    The OP's mower won't even crank :-(
    Whats this means..? Are we doing the wrong diagnosis..? Please help.
  • sujsuj
    sujsuj Posts: 744 Forumite
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    molerat said:
    In your pic 2LHS the silver right angled thing on the left is the spark plug cap.  Pull that off and you will see the plug.
    molerat said:
    In your pic 2LHS the silver right angled thing on the left is the spark plug cap.  Pull that off and you will see the plug.
    Thanks all..
     Getting there with Spark plug..
  • sujsuj
    sujsuj Posts: 744 Forumite
    Fifth Anniversary 500 Posts Name Dropper
    The last time I made the mistake of tipping up my mower, the problem was that engine oil had got into the paper air filter. I just removed the fi!ter, cleaned up any excess oil, left it to stand for a while, fitted a new filter and started the mower. There was lots of smoke as oil had gone into the carburretor etc but after a few minutes it burnt off and ran normally.

    The OP's mower won't even crank :-(
    The last time I made the mistake of tipping up my mower, the problem was that engine oil had got into the paper air filter. I just removed the fi!ter, cleaned up any excess oil, left it to stand for a while, fitted a new filter and started the mower. There was lots of smoke as oil had gone into the carburretor etc but after a few minutes it burnt off and ran normally.
    I cleaned up this area yesterday..are you talking about this..?


  • ThisIsWeird
    ThisIsWeird Posts: 7,935 Forumite
    1,000 Posts Second Anniversary Name Dropper
    edited 18 May 2023 at 7:03AM
    Nice job so far, SS.
    No, the diagnosis still stands - if the engine won't even crank over (and it ain't down to obvious stuff like a flat battery, or mower still in gear...), then there's a risk it's due to oil inside the cylinder which cannot be compressed (unlike the air which is usually inside the cylinder). Ergo, the engine cannot turn over. I obviously don't know it's down to this, but if the engine does not turn, then it needs investigating and eliminating as a possibility.
    (Tbh, unless the engine's oil level dropped an obvious amount when tipped over - did it? - then it's not highly 'likely' to be this, but as long as there's a chance, it needs sorting. Trying to turn an engine when it's 'hydraulically locked' can seriously wreck it.)
    That spark plug looks to be in good condition, and I doubt very much if it's seized in the cylinder head. Allowing for S62's rightful caution, I personally would have no hesitation in DIYing its removal; had there been signs of corrosion around the seal, for example, that would have been different.
    Do you have a plug spanner? Or, since you've managed to expose the plug so well, a ring spanner would even be better. Do you have one that'll fit?
  • CliveOfIndia
    CliveOfIndia Posts: 2,524 Forumite
    1,000 Posts Second Anniversary Name Dropper
    sujsuj said:
    The last time I made the mistake of tipping up my mower, the problem was that engine oil had got into the paper air filter. I just removed the fi!ter, cleaned up any excess oil, left it to stand for a while, fitted a new filter and started the mower. There was lots of smoke as oil had gone into the carburretor etc but after a few minutes it burnt off and ran normally.

    The OP's mower won't even crank :-(
    The last time I made the mistake of tipping up my mower, the problem was that engine oil had got into the paper air filter. I just removed the fi!ter, cleaned up any excess oil, left it to stand for a while, fitted a new filter and started the mower. There was lots of smoke as oil had gone into the carburretor etc but after a few minutes it burnt off and ran normally.
    I cleaned up this area yesterday..are you talking about this..?


    That looks to me like a sponge air filter - my old mower used to have a similar thing.  Usually you can clean them.  Give it a good squish/squeeze in warm soapy water (ordinary washing-up liquid) until it's clean.  Rinse it thoroughly in clean water, leave it to dry.  Once it's completely dry you can refit it.

  • ThisIsWeird
    ThisIsWeird Posts: 7,935 Forumite
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    edited 18 May 2023 at 7:04AM
    Quite possibly it's meant to be oily. Especially if it's a 'coarse', very breathable, foam - one that wouldn't provide much filtration from dust if left dry.

    If so, it's usually (carefully) cleaned in petrol or another solvent, allowed to dry, and then given a light coat of fresh oil, squeezing the excess out as much as possible. It's the thin oil coating that does the dust catching.
  • sujsuj
    sujsuj Posts: 744 Forumite
    Fifth Anniversary 500 Posts Name Dropper
    edited 17 May 2023 at 6:43PM
    I opened box marked OHV (Overhead Valve) found oil in it..especially bottom part. Is it supposed to have oil inside..? I mean is this lubricated area..?

    Should I clean this up..?


  • chris_n
    chris_n Posts: 635 Forumite
    Part of the Furniture 500 Posts Name Dropper
    Stop randomly taking bits apart before you damage anything else. You need a new gasket for that now and yes it should have oil in there. Remove the spark plug as you have been told, crank the engine to remove excess oil as described earlier. Clean the spark plug or renew it, get a new gasket and refit the rocker cover, put the air filter back together once clean and see if it starts.
    Living the dream in the Austrian Alps.
  • sujsuj
    sujsuj Posts: 744 Forumite
    Fifth Anniversary 500 Posts Name Dropper
    ThisIsWeird its not battery or in Gear, Battery, I fully charges and in gear it will not even make this sound:

    ThisIsWeird, Yes engine level dropped and I topped up as well. 

    ThisIsWeird,That spark plug looks to be in good condition >> Is this means I don't need to remove spark plug from body..?

    ThisIsWeird,got a plug spanner but slightly bigger so may need a new tool  Thanks
  • sujsuj
    sujsuj Posts: 744 Forumite
    Fifth Anniversary 500 Posts Name Dropper
    Thanks. Is this just cleaning up blackened tip of this..? Any thing more to be careful while cleaning..?
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