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First ever rebuild: Stihl 038magnum?

Discussion in 'Shop Projects' started by Manofstihl661, Oct 24, 2019.

  1. Manofstihl661

    Manofstihl661 Pinnacle OPE Member

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    Awesome I’ll give it all a good wipe down then blast it best I can
     
  2. Manofstihl661

    Manofstihl661 Pinnacle OPE Member

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    Well I started cleaning and thought...I don’t remember ever looking in the intake side of the jug... :(

    Guess this thread is dead quicker than it started...

    [​IMG][​IMG]

    As soon as I had to remove a strange piece of metal from the boot i knew it wasn’t going to be good. Looked in and knew where it came from immediately and decided cleaning the saw was useless so I pulled the jug. Guess I have a few parts maybe that I could dish out but other than that I’ll just practice taking it apart I guess.
     
  3. Moparmyway

    Moparmyway Its just a saw GoldMember

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    What’s the diameter of the piston or the bore ?
     
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  4. Manofstihl661

    Manofstihl661 Pinnacle OPE Member

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    Cylinder doesn’t seem bad...maybe? I don’t feel anything besides the dark colored area which I’d assume is carbon deposit? Maybe it could be saved for if I find a better specimen later? I’ll get measurements and numbers in a second. Also a picture down around the crank coming.

    [​IMG][​IMG][​IMG][​IMG][​IMG]
     
  5. Manofstihl661

    Manofstihl661 Pinnacle OPE Member

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    Appears to be a 51mm bore
     
  6. Manofstihl661

    Manofstihl661 Pinnacle OPE Member

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    51.75 or so...so maybe 52 since my calipers were bought off amazon and either way probably have some leeway
     
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  7. Manofstihl661

    Manofstihl661 Pinnacle OPE Member

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  8. qurotro

    qurotro Cookie Cutter

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    That's kinda odd damage... Lucky enough 52mm 038 psiton is easy to find.. Yes the cylinder is good.
     
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  9. Manofstihl661

    Manofstihl661 Pinnacle OPE Member

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    I thought so too but I dont have much experience. I thought with the piston seemingly being destroyed it would have scarred up the cylinder at least too.
     
  10. Wolverine

    Wolverine Fruit wood champion

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    For some reason, your pics aren't loading for me.

    Do you have any previous experience with an 038mag? I rebuilt and flipped one a few years ago. It was a turd stock. Boat anchor weight and 60cc performance in a 72cc package. My ported 56.5 cc would rip it a new azzhole so after that I've never understood the lure of these saws.
    This is how I bought it. Using the MM method of transfer removal, it cleaned right up.
    DSC00423.JPG
    After:
    DSC00437.JPG
     
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  11. Wolverine

    Wolverine Fruit wood champion

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    Oh wow, just saw pics of the bottom. Not looking good. I was guessing you had transfer on the cyl.
     
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  12. Moparmyway

    Moparmyway Its just a saw GoldMember

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    I’d split the case, inspect the crank/rod real good. If it checks out, install new bearings and seals.

    Let’s see what you decide to do with it, have you ever split a case before ?
     
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  13. Manofstihl661

    Manofstihl661 Pinnacle OPE Member

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    Never split a case. So if anything I may go through the motion on it to an extent to get the experience of it. Then if anything I have spare parts for later and could find another builder or a runner or who knows. But I want to go through and learn how to check things and them apart at least if that makes sense
     
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  14. Manofstihl661

    Manofstihl661 Pinnacle OPE Member

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    No previous experience with one but I’ve always heard good things actually.
     
  15. Al Smith

    Al Smith Pinnacle OPE Member

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    Don't listen to any negativity about an 038 Mag because you can add some soup to them if you know how .Those Mahle cylinders are tough .I rebuilt one with a grenaded piston worse than that one and the cylinder didn't have as much as a dent in it . Even stock they do very well .The one I rebuilt had served over 20 hard years of service for a tree company and ten more after I rebuilt it and it was given to me .
    That one is pretty funky inside .Soak it in a bucket of kerosene for a while to get all that sludge and crude off it .
    Parts for the 038 mag are relatively inexpensive and pletifull in both OEM and after market .--good luck
     
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  16. Manofstihl661

    Manofstihl661 Pinnacle OPE Member

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    I appreciate the encouragement. I’m keeping an eye out for parts saws and such to supplement this one. It’ll be a long journey but eventually I’ll get it done
     
  17. qurotro

    qurotro Cookie Cutter

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    038s are tough though they are heavy. I've seen guys ran diesel motor oil as a mix in them all day long without blowing it up.
     
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  18. Al Smith

    Al Smith Pinnacle OPE Member

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    About a pound more than a 372 Husky or an 044 Stihl .These thing have some meat on their bones ,made for the long haul .
     
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  19. Al Smith

    Al Smith Pinnacle OPE Member

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    Seriously if anything a pound or two doesn't make any difference and if anything bucking on the ground is a help .You just hit the gas and it eats it's way right through .No hooking a dog and leaning on it hard .Fact I did two 15" maple logs yesterday with a souped 038 mag in almost no time at all . Just let -er-rip and move it along at about 16" apart .Roll it over with a cant hook and cut them all loose in a flash .Done--put the saw away and drink beer .There was about a face cord in those two logs and it took me maybe 15 minutes .Not bad for an old retired fart
     
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  20. OC455

    OC455 Well-Known OPE Member

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    So, how did this turn out or is it on the back burner?
     
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