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Quick mower question

Afternoon all,  I serviced our own mowers this year but forgot to sharpen the bald on the little battery mower we use for carrying up steps to small lawns.  I took the blade off, sharpened it, but when I tried to put it back on the screw won't tighten up any more than finger tight.   When I try and get it tighter it just continues to turn. Any ideas much appreciated.

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  • hi what model of mower is it, on some like the bosch rotaks you need to stick a narrow screwdriver or similar in a small hole to lock it whilst tightening the bolt

  • Might sound a silly question but you are using the correct bolt and not one from something/somewhere else?..... sometimes things can get a bit mixed up.  I'd guess the thread on the bolt is ok?  When you tighten the blade "tighter" and it just continues to turn, does the motor then turn ?.... if "yes", you'll need to "lock" the motor somehow + make sure that you have replaced any thick washers/spacers that were above/below the blade/under the bolt head..... the bolt couldhave screwed down as far as it will go into the "hole" without clamping the blade if these bits have been omitted.   

    • PRO

      Yes, correct bolt and washer in correct place.  Suspect it will be the locking issue.  Cheers

      • yes the hole probably hidden by grass residue but it's there somewhere... well done on sharpening the blade i lack the skills and patience so i just get a brand new spanker off ebay... if its the 43cm type theres a guy called Matt who does the genuine leafcollect ones cheap, about 12.50 to 13 quid each if make an offer on a few, he told me i could have 10 blades for 100 pounds or 50 for 400 pounds but i don't get through them that quickly lol; they are practically the only running cost on these machines apart from a few pence worth of electricity as the batteries should last well over a decade with care

        • You really ought to get an angle-grinder and do it yourself............. it really is so quick and simple.....minimal skill and no patience needed!...... a 2 minute job. 

          • me being lazy, i know lol ... they seem quite a soft metal so i don't think i would be able to get the edge how i want it, let alone properly balanced ... for the price of 10 litres of petrol i haven't had to buy, I feel justified treating the machine to a new one occasionally

  • also It may be a left hand thred 

  • Hi I just recently purchased a Rotak 43LI and used it last week on about 16 gardens that I would normally use my 16" IZY and was very happy with it, but they were the first cuts and the blade took a bit of damage so I decided to sharpen it and I've the same problem with where when I try and tighten the blade it just keeps turning. I've put a screwdriver in the lock hole but it keeps turning. Did you find a solution to this or is the bolt supposed to turn when it's tight enough?

    • maybe try a thinner screwdriver or a different hole.... the blade should stop turning completely when the screwdriver or similar implement blocks it from rotating, alowing the retaining nut to be tightened. i suspect the screwdriver isnt going far enough in the hole to engage with the locking mechanism, perhaps try shoving it in carefully whilst moving the blade into different positions until it locks, like anything its easy once you know how

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