Replacing bent trimmer shafts?

Discussion in 'Mechanic and Repair' started by cpllawncare, Jul 23, 2013.

  1. cpllawncare

    cpllawncare LawnSite Silver Member
    Messages: 2,659

    Anyone ever replaced a bent shaft on their Stihl trimmers? one of my helpers ran over two of my trimmers, ARGH! Yeah he got fired!
  2. Breezmeister

    Breezmeister LawnSite Bronze Member
    Male, from South Jersey
    Messages: 1,734

    Yes....Take the head off, disconnect throttle and wires, remove the tube from the engine, place the new tube next to the old one and mark where the handle and throttle go, transfer everything over, put new tube on engine, put new shaft in tube and make sure it seats in clutch cup, put head back on and make sure it seats on shaft, tighten everything up and reconnect throttle and wires......done.
  3. BigFish

    BigFish LawnSite Gold Member
    Messages: 3,998

    Not definitely wanna lube the driveshaft/cable while sliding it in the tube. Also a small dab O grease at the clutch cup end .
  4. lawncuttinfoo

    lawncuttinfoo LawnSite Bronze Member
    Messages: 1,010

    Pretty easy fix.

    Ran over with a truck because someone else put them in the road or on a driveway? I'd fire they guy who put them there, I have a rule, no small equipment in roads or drives for this exact reason.

    Or ran over with a mower in the lawn when he could see them a mile away? In that case ya he's at fault.
  5. LandscapeSavannah

    LandscapeSavannah LawnSite Member
    from Georgia
    Messages: 112

    This is why we keep everything. Even blown trimmers. They always come in handy for some sort of part. But yeah a new shaft is easy. Takes about 10 minutes.
  6. Porcupine Lawn and Snow

    Porcupine Lawn and Snow LawnSite Senior Member
    Messages: 334

  7. Valk

    Valk LawnSite Silver Member
    Messages: 2,711

  8. Breezmeister

    Breezmeister LawnSite Bronze Member
    Male, from South Jersey
    Messages: 1,734

    There was a time I would hand grease the shaft with regular hi temp red gearse, now it's just spray with FF and go.....
  9. cpllawncare

    cpllawncare LawnSite Silver Member
    Messages: 2,659

    How much does the shaft cost? I'll try the warranty road first obviously but kinda doubt
  10. captken

    captken LawnSite Bronze Member
    Messages: 1,704

    Funny how these post echo my experiences! I read and listen and many times I find the solution lurking about not wanting to hijack a thread.
    Last week, during a torrential downpour coming back to the shop, a city bus clipped my jungle jims weedeater rack. Amigo was trying to tell me but he couldn't quite get it out for about 3 blocks, he managed buush! buush! and pointing.
    I couldn't see anything amiss, I shoulda pulled over to check but I didn't think any damage was done, and it was raining hard rush hour traffic and lightening popping all around.
    Come to find out my trailer and rack was okay but the new Stihl FS 100 RX shaft was bent at a 25 degree angle right off the clutch housing! Musta clipped the bus mirror?
    I don't think those models have a solid shaft, I may be wrong, since I haven't tried to pull the mangled shaft out yet, but if its not solid, may have saved the power head
    No problem! went to my trimmer part graveyard [55 gallon drum] and got another Stilh tube with a solid shaft that came off who know what Stihl 2cycle power head.
    dab of grease, slide the tube up, line up the shaft so that you know it's in the clutch, and you are good to go!
    Last edited: Jul 24, 2013

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