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029 super rebuild?

Discussion in 'The Repair Shop' started by Chainsawpastor, Jan 31, 2019.

  1. Chainsawpastor

    Chainsawpastor Active OPE Member

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    Got a free 029 super. No bar, plastics are good, no start, pulls over hard and kinda chunck chunck when you pull. Disassembled, cylinder looks decent to me as does the Piston. Only thing I can see is there seems to be a lot of play in the connecting rod on the crank but I'm not sure what it should be like. Is it possible that it's loose enough to bind on the crank and or for the Piston to migrate over against the cylinder wall? IMG_20190130_223005160.jpg IMG_20190130_222952444_BURST000_COVER_TOP.jpg IMG_20190130_222830411.jpg
     
  2. Husky268

    Husky268 OPE Member

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    it will have side to side motion but should not have any up and down motion.
     
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  3. Husky268

    Husky268 OPE Member

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    Looks like you need a new piston and rings, looks like rings are stuck and mark on piston. look at your cylinder good and see if it has marks in it.If it does i would do new piston,cyl, ringsand seals.
     
  4. Husky268

    Husky268 OPE Member

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    If you go to huztl on ebay you can buy the complete engine for cheap.
     
  5. Chainsawpastor

    Chainsawpastor Active OPE Member

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    Rings are not stuck nor are they broken but those marks on the side of the Piston gives me pause. Cylinder actually looks really good.
     
  6. stretch5881

    stretch5881 Well-Known OPE Member

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    I had one last year that made the same noise. It turned out to be a worn bearing on the flywheel side causing the flywheel magnets to rub on the coil.
     
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  7. Chainsawpastor

    Chainsawpastor Active OPE Member

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    Thanks. Bearings seem good but I'll look for signs of contact. It's actually my son's saw and he was trying to put the cylinder back together and broke a ring...which makes me wonder if they weren't stuck/brittle. Now he's thinking he should just get a 390 top end assembly.
     
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  8. stretch5881

    stretch5881 Well-Known OPE Member

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    I put one together with a Cross 039 top end and did a MM. I put a 20" Tsumura bar on it. One of my neighbors tried it out and bought it an hour later. He didn't even try to haggle. He cut 2 winters worth of wood with it so far. I had to put a decomp valve on for him cuz he is in his 70's.
     
  9. grizz55chev

    grizz55chev Well-Known OPE Member

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    I’d do the long block, 039 of course!:cool:
     
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  10. Husky268

    Husky268 OPE Member

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    yea if im going to do it its getting a 039 not much diff in price.
     
  11. Chainsawpastor

    Chainsawpastor Active OPE Member

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    Put back together with cross performance 039 top end. New seals, fuel line, new decompress, cleaned carb, no start. Will fire if you dump fuel in spark plugs and but otherwise no fire. Any suggestions?
     
  12. grizz55chev

    grizz55chev Well-Known OPE Member

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    Vacuum pressure check, what sealant was used on the pan?
     
  13. Chainsawpastor

    Chainsawpastor Active OPE Member

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  14. grizz55chev

    grizz55chev Well-Known OPE Member

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    Sounds to me like a massive vac leak, vacuum is what drives the fuel “ pump”.
     
  15. Chainsawpastor

    Chainsawpastor Active OPE Member

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    Also don't think the decompress is sealing right. You can hear air when you pull it over slowly even when it's supposed to be shut.
     
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