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Kaw FH430V engine block repair..

Discussion in 'Mechanic and Repair' started by piston slapper, Sep 9, 2013.

  1. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    This engine is a recoil start...
    The 4 bolts that hold the recoil broke..the 2 at the rear of the engine also broke the block where the bolts attach..
    helicoils wont work..JB weld wont work..
    I was ready to throw in the towel and buy a new $1400 engine...
    I decided to make my own inserts...
    I drilled the holes almost into the crankcase ....and threaded the holes for a 3/8 x 16 bolt..
    I threaded in the bolts as far as they would go...and painted them to mark them for depth..
    I locked 2 nuts on the bolt and cut it to length...drilled it and threaded the new insert with a M6x1.0 tap...

    Heres a few pics...






  2. Breezmeister

    Breezmeister LawnSite Bronze Member
    Male, from South Jersey
    Posts: 1,546

    Brilliant ! :drinkup:
    ericg likes this.
  3. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,023

  4. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    I will finish this repair tomorrow...if they didn't tear up too much stuff today..
    Incedentally...this is the 2nd turf tracer that they ripped the recoil assy off of in the past 3 weeks..
    The other one had snapped off bolts in the block also...but...I was able to set a nut over the broken bolt and. Mig the broken bolt to the nut...and just wrench them out...
    If I can find them...I'll. Post the pics tomorrow...

    So you want to be a commercial mower tech.???
  5. Jeff in AL

    Jeff in AL LawnSite Senior Member
    from Alabama
    Posts: 729

    Now there's some Southern ingenuity! Good job!

    Any cause for the bolts breaking to begin with?
  6. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    I have been fortunate to work around some pretty sharp people over the years.
    One thing I have learned....problems are opportunities....if you can find the patience to work thru them....

    The reason the bolts are breaking and working loose is those dumbazz engineers at Kawasaki...
    Instead of bolting the recoil assy to a METAL blower housing...the recoil sits atop 4 long bolts centered over the engine..
  7. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Posts: 2,231

    Now that's some damage that I've not seen before, Slapper--apparently the same for you, as well, since you're sharing the repair procedure. Look's alot like something I might attempt and I've done some "make do" repairs in the past as well.

    Jeff asked the same question I had--apparently your "jugheads" just failed to let you know that the recoil assembly was getting loose. Likely the studs in the back got loose.

    Nice repair, Slapper.:waving:
  8. Jeff in AL

    Jeff in AL LawnSite Senior Member
    from Alabama
    Posts: 729

    Ahh, ok... Don't do very much with walk behinds, so don't see this issue.

    Ya gotta love the fact they design this sh!t on a computer, and never have any failures... If only they could see things in the real world.
  9. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    I've made custom inserts before...usually for stripped out rockerarm studs in aluminum heads..
    In this instance....its find a way to fix it...or buy a new engine...
  10. herler

    herler LawnSite Fanatic
    Posts: 5,144

    You better be careful, last time I went re-boring an engine I struck oil LOL!
    No, it leaked, the bit had just scraped open an oil passage wall.

    Fortunately they also sell that cover there, not sure in your case what it would be called, in my case I had to get a new cylinder head...
    Might have cost me and then you need gaskets too but it's nowhere near as much as a new engine.

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