Echo PB755 stripped carb mounting bolt

Discussion in 'Mechanic and Repair' started by jm3971, Jan 25, 2012.

  1. jm3971

    jm3971 LawnSite Member
    Posts: 30

    I have an Echo PB 755 that I stripped the bolt hole threads on one side of the carb mount . Can anyone give me some ideas on the best way to go about repairing this problem .I would like to keep this blower as long as possible so any ideas would be appreciated.
     
  2. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Posts: 2,231

    The best solution is a Helicoil repair kit(other brands are available).

    Here's a link to the process: http://www.youtube.com/watch?v=RFYa6sjhh_E

    If you don't feel confident in doing the job yourself, a small engine shop should be able to do it for you. I've been away from a shop for close to 10 years now so am not familiar with what they might charge--the last I recall was $30-40.

    The main problem in doing it yourself to begin with, is the initial cost of the kit. The last kit I purchased was around $28-30(per thread size) as I recall and if you don't have a proper drill size for the required kit you will have to purchase/borrow one. In the end, the shop cost versus DIY is going to be comparable.

    Something you must consider is whether the hole is a through hole or a blind hole. If it's a blind hole, you will need a stop collar or a wrap of tape around the bit to insure that you don't go too deep thereby entering the cylinder.

    Ir's just a stab in the dark, but I believe Echo uses 5x.8mm thread--you will want to check to make sure.
     
  3. BigFish

    BigFish LawnSite Gold Member
    Posts: 3,171

    The carb mounts to a plastic insulator block. If the ins. block is stripped, then simply replace it. If the cyl. screw threads are stripped, then ya gotta heli-coil.
     
  4. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Posts: 2,231

    You're all over it, Fish. Good pick up--first things first.

    I've replaced numerous isoblocks that had developed cracks but can't recall doing so for a thread failure. Fish, either I need one of those memory enhancement seminars or some of your meds.
     
  5. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Dutch....your memory is holding up just fine.
    As long as you don't forget that you were supposed to remember something, its all good.
    Posted via Mobile Device
     
  6. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Posts: 2,231

    Slapper, I'm not at this point yet but I'm working on it. Watch

    http ://www.tomrush.com./video_remember.html
     
  7. jm3971

    jm3971 LawnSite Member
    Posts: 30

    I appreciate the info guys . I'll check to see if it's an insulator block , if not then I'll tackle the Helicoil project.
     
  8. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Dutch.....even with a little recall problem every now and then,you still know more than 95% of the folks on this site.
    A personal secretary with big #^%&##'s and an IQ above a potato could help.
    Posted via Mobile Device
     

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