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Stroking a Dolmar 7900

Discussion in 'Chainsaws' started by Fruecrue, Nov 5, 2018.

  1. tickbitintn

    tickbitintn Pinnacle OPE Member

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    You can say all that again!
    Cut up a very large one for my brother a couple summers ago. As in 36" bar from one side which left about half the bar from the other side.
    It had been down a while and whittled up everything that was up off the ground pretty quickly with a 550. When it came time for the bigger pieces that were in contact with the squishy low lying ground, not so quick
    Had to block up the trunk sections to be able to move it. Soggy and weighed a metric chit ton. 394 noodling clogged up real fast.
    No fun!

    Sent from my XT1635-01 using Tapatalk
     
  2. mettee

    mettee Super OPE Member

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    Any rpm difference in the cut with the unlimited coil? Not sure if you took a tac reading or not, but it sounded faster.
     
  3. Deets066

    Deets066 AKA Deetsey

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    It’s hard to accurately measure rpm in the cut. I don’t waste my time with it. Stopwatch is about all that matters
     
  4. Fruecrue

    Fruecrue I got wood

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    I haven’t put a tac on it at all.
     
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  5. mettee

    mettee Super OPE Member

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    Well it's faster I can hear it
     
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  6. Time's Standing Stihl

    Time's Standing Stihl Below me...

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    Stock carb still?
     
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  7. 00wyk

    00wyk Pinnacle OPE Member

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    We would call it poplar here in Europe. And it is remarkably similar to the black cottonwood I've cut in Oregon and Washington.
     
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  8. Fruecrue

    Fruecrue I got wood

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    Nope.
    There’s some voodoo in there.
     
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  9. mettee

    mettee Super OPE Member

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    Did you see this ?

     
  10. Fruecrue

    Fruecrue I got wood

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    The competition?
    Yup, I seens it.
    Dude beats me every year. Lol.
     
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  11. mettee

    mettee Super OPE Member

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    Yours will be there, just need the porting and compression.

    And to spend about a week dog boning a chain and shrinking the teeth and rakers. Or like he does build one, one tooth at a time out of 325 link to 3/8 cutters. Or something of the sort
     
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  12. Time's Standing Stihl

    Time's Standing Stihl Below me...

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    Lol'z
     
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  13. Terry Syd

    Terry Syd Pinnacle OPE Member

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    Not so sure about that combination, but racers in Oz have used .325NK chassis with regular square .325 cutters. The chassis is just as strong and you don't have to do any 'dog boning' or thinning of rivets.
     
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  14. Fruecrue

    Fruecrue I got wood

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    That Clint Davis guy....
     
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  15. Redfin

    Redfin Meh...

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    Nice saw Dood.
     
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  16. mettee

    mettee Super OPE Member

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    Yeah I'm not sure of the actual combo but he mentioned something about building one from scratch link by link with 325
     
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  17. mettee

    mettee Super OPE Member

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    Is Clint on here? I'm not sure of everyone's name yet.
     
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  18. mettee

    mettee Super OPE Member

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    Are you Clint?
     
  19. Fruecrue

    Fruecrue I got wood

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    Ding ding ding
     
  20. Fruecrue

    Fruecrue I got wood

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    Now we know what saw Clint will be running, but more importantly, what chain will Clint be running?
     
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