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  1. R

    Mountfield 454 HP and Sp baffled

    Thanks for quick reply, I agree its definitely a fuel supply issue, carbs have been stripped at least 3 times each cleaned, blasted with compressed air. - main jet is lovely and clean and so is the emulsion tube all the holes are clean, see day light through them Have blasted compressed air...
  2. R

    Mountfield 454 HP and Sp baffled

    Thanks again, these carbs only have a fixed pilot jet which you can't remove, main jet and emulsion tube stripped and cleaned in a ultra sonic machine overnight, we have made some progress can now get them to run on choke, but once you try to reduce speed they die, I'm convinced the carbs need...
  3. R

    Mountfield 454 HP and Sp baffled

    Yes, carburettor dried with compressed air and choke on both machines working, thanks for reply.
  4. R

    Mountfield 454 HP and Sp baffled

    Recently taken in 2 mountfield 454 mowers one sp the other HP, within 1 day of each other. Non runners both 2015 models with the Rm45 engine ohv. We mainly fix Briggs, sthil, John deere and are other local repair shop fixed the mountfields and older cylinder mowers, but they have sold up and...
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