ArboristSite.com Sponsors
 
 


Stihl 051

Discussion in 'Saw Building 101' started by Mustang71, Jan 12, 2018.

  1. Mustang71

    Mustang71 Addicted to ArboristSite

    Joined:
    Sep 30, 2016
    Messages:
    1,664
    Likes Received:
    1,520
    Location:
    Somerset NY
    So I bought a 051 av eq and cleaned it up and it runs. Any reason to modify it? It has a 26" bar. It's way more saw than i need. I usually do muffler mod on my saws but does this saw need it? I haven't cut with it yet. I know these saws will pull a 5 foot bar.
     
  2. happysaws

    happysaws Addicted to ArboristSite

    Joined:
    Jun 19, 2016
    Messages:
    1,233
    Likes Received:
    2,025
    Location:
    Somewhere between the north and south poles
    I really doubt a 90cc saw will pull a 60" bar.
    It would more than likely have a very hard time with a 42" bar.
    Stihl rated it for a 30" bar...
    Just saying.

    Smoothing out the ports and crankcase along with slightly advancing the timing will usually improve performance.
     
  3. Mustang71

    Mustang71 Addicted to ArboristSite

    Joined:
    Sep 30, 2016
    Messages:
    1,664
    Likes Received:
    1,520
    Location:
    Somerset NY
    I don't plan on running a bigger bar anyways or using the saw a ton. It weighs like 30 pounds. I was wondering if it needed modification or gained a great deal of power from some simple mods like some saws do.
     
  4. Corporate Slave

    Corporate Slave ArboristSite Member

    Joined:
    Jan 9, 2018
    Messages:
    53
    Likes Received:
    31
    Location:
    west coast WA
    yes, there is reason to modify it. Plug the limiter on the carb. Grind the sides off the the piston beneath the piston port windows so its flat. And enlarge the piston port windows downward. Make all of the intake block / gaskets / heat shield all match the cylinder intake. Hack open the muffler and gut it....slap the hacked piece back on.....make the muffler flange and muffler gasket match the cylinder exhaust port. Runs way better after all of that....runs like a 90cc saw should. Also can slap a 3/8 bar and chain on there since most come with 404
     
    president likes this.
  5. Corporate Slave

    Corporate Slave ArboristSite Member

    Joined:
    Jan 9, 2018
    Messages:
    53
    Likes Received:
    31
    Location:
    west coast WA
    And base gasket delete. And grind / sand the bottom of the intake block so it's flat again.
     
  6. FWANK WIZZO

    FWANK WIZZO Loads of BS by appointment

    Joined:
    Sep 29, 2018
    Messages:
    58
    Likes Received:
    113
    Location:
    At hotsaws101
    Only thing i would modify is the handle to make sure it can hold the rope securely when tied off to your boat...
     
  7. Mustang71

    Mustang71 Addicted to ArboristSite

    Joined:
    Sep 30, 2016
    Messages:
    1,664
    Likes Received:
    1,520
    Location:
    Somerset NY
    I thought that was how you got big muscles buy a 35lb saw and use it all day lol.
     
  8. 67L36Driver

    67L36Driver Tree Freak

    Joined:
    Nov 1, 2010
    Messages:
    12,991
    Likes Received:
    11,997
    Location:
    St. Joseph, MO
  9. Yotaismygame

    Yotaismygame saw me up

    Joined:
    Nov 1, 2017
    Messages:
    358
    Likes Received:
    260
    Location:
    Orgone
    Corporate Slave is on to something. Ran one myself with a 36" bar buried through Doug fir. Cut the whole large half of that tree with that saw.
     

Share This Page