RedMax EBZ8001 problem

Discussion in 'Mechanic and Repair' started by blade11, Nov 12, 2013.

  1. blade11

    blade11 LawnSite Member
    Posts: 32

    I have 2 RedMax EBZ-8001 backpack blowers that we are trying to resurrect. Both units will start but do not run anywhere near full strength; they both bog down really bad as they attempt to throttle up so we think whatever the problem is, it is affecting both units. Here is a list of things that have been replaced on each unit: new short-block motor, new carb, new fuel lines, new fuel filter, new spark plug. Both are unaffected when running with muffler off and also gas tank cap off. We are awaiting a new insulator & gasket and think that there is not much else that is not brand new on these blowers. We have several of these blowers that work great, so we even tried taking the carb off one of these good working blowers and swapping with a brand new one on a bogging blower, and it did not affect the bogging blower. Finally, we took one of these bogging blowers to a local repair shop. They looked at it and said it was a timing issue. After they tried to re-set the timing, the same problem persists and that made no difference. They gave up on it & said they'd just be throwing parts at it (which is what we have already done!)
    :confused:
    ANY IDEAS/SUGGESTIONS??
     
  2. Landrus2

    Landrus2 LawnSite Platinum Member
    Posts: 4,811

    Did you forget the coil:waving:
     
  3. blade11

    blade11 LawnSite Member
    Posts: 32

    The coil on each of the units checked out ok
     
  4. Landrus2

    Landrus2 LawnSite Platinum Member
    Posts: 4,811

    If your crank oil seals are bad it will affect crank case pressure.
     
  5. tigerepairdotcom

    tigerepairdotcom LawnSite Senior Member
    Posts: 325

    Buy a stihl br 600! lol jk jk


    What's the compression in both units? Did you vacuum and pressure test?

    But seriously here is redmax diagnosis procedure

    common ground
    secondary compression
    carburetor pressure testing
    all spark plugs are NOT the same
    https://www.youtube.com/watch?v=V9vT...ature=youtu.be fuel tank and vent pressure/vacuum test
    https://www.youtube.com/watch?v=jlGggAEtLjY fuel filter and fuel line inspection and testing
    http://www.youtube.com/watch?v=I5fQ4...ature=youtu.be primary compression and vacuum testing
    https://www.youtube.com/watch?v=WdLZWYhlg18
    youtube links
    https://www.youtube.com/watch?v=e1mv...ature=youtu.be
    https://www.youtube.com/watch?v=2xVy...ature=youtu.be
    https://www.youtube.com/watch?v=iOwh...ature=youtu.be
     
  6. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 12,960

    Try adjusting carb. Are these 2 stroke? Timing thing interesting. Did they adjust coil magnet to flywheel?
     
  7. BigFish

    BigFish LawnSite Silver Member
    Posts: 2,914

    Just exactly how did you check out the coil???

    Insulator cracked at the air web? Gaskets? Fuel lines on right? Pulse hole open& not clogged?

    Whatever shop you took it to got to be morons!!!! Timing onna two stroke??? W. T. F. !!

    OH NO........HEREWEGOAGAIN................
     
  8. billc1004

    billc1004 LawnSite Member
    Posts: 138

    Sometimes you can spray starter fluid in the recoil at the started rope see if that has any effect on that side crank seal..( yea i like the timing thing lol )
     
  9. blade11

    blade11 LawnSite Member
    Posts: 32

    One coil is brand new and the other has same resistance as the new one. These are 2 stroke and there is no adjustment on the carb (walbro wya-44). We have ruled out the carb as causing the problem; not only did we swap a carb off different EBZ-8001 that is running good & have no effect on the bogger, but we also put the brand new carb from the bogger on the good running unit, and it worked great on it. They seem to be getting too much fuel. Hoping it's the insulator...don't see anything obvious that looks wrong with it when it is removed but that is just about the only thing that isn't new
     
  10. sjessen

    sjessen LawnSite Silver Member
    Male, from Knoxville, Tn
    Posts: 2,726

    Loosen the fuel tank cap and see how they do.
     

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