Author Topic: 041 Farm Boss only runs with choke out  (Read 655 times)

0 Members and 54 Guests are viewing this topic.

Offline Canuck guy

  • pruner
  • *
  • Posts: 1
  • Karma: 0

  • Total Badges: 4
    Badges: (View All)
    Topic Starter First Post Level 1 Windows User
041 Farm Boss only runs with choke out
« on: November 17, 2013, 02:04:30 am »
 Hi, this is my 1st post. I have an old 041 Farm Boss (non AV) with a Tillotson carb. In the 70s my boss gave it to me when I left his tree company and headed to university. In the past twenty years I've run it about once a year, usually for a good workout of a few hours of falling or bucking or trimming -- and its always run like a trooper, only occasional trouble with a plugged oiler.
However, today I had a tough time starting it, and when it got going it would only run with the choke mostly out.  It ran pathetically for about an hour or so, (trying to buck up an old cedar stump which my wife rightfully thinks is an eyesore in the corner of our yard... she arrives home tomorrow from an 8 day trip, and I wanted to impress her with my diligence...sigh) Even when it was all warmed up from cutting in it's feeble condition, I couldn't move the choke in - it had to be almost all the way out. When I pushed the choke in, the engine would rev high momentarily, and then die -- and if I quickly moved the choke out again, the engine would catch and keep running.
But it has no power, none of that old dogged torque and strength that would chew thru a log... I have to nurse it along at low rpm and it easily bogs down so I can't even use the full edge of my 18" bar. Pitiful...pathetic... embarrassing for such a noble saw... it took ages to make a few cuts...
   I'm on a tight budget so don't want to take it to the shop. I'm a backyard DIY guy and pulled lots of engines and carbs apart, but never my 041.
I looked on the web but can't see any video/forum that actually talks about doing carb adjustments, or even a diagram  of this carb and what/where adjustable screws it has, and how many turns out after you've screwed them in all the way.

I've appreciated the detailed, knowledgeable responses I've seen in this forum to other questions -- I'm looking forward to hearing your wisdom.  Thanks in advance for taking time to help me.

Share on Facebook Share on Twitter


Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO

  • Total Badges: 39
    Badges: (View All)
    Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary Fourth year Anniversary 5000 Posts Third year Anniversary
Re: 041 Farm Boss only runs with choke out
« Reply #1 on: November 17, 2013, 02:26:06 am »
I don't have a 041 and have not worked on one but that chainsaw has a air leak as you describe the way it acts.

A saw that old may have a lot of problems like dirty fuel filter, **** fuel line, bad impulse line, Leak between the carb and cylinder, dirt in the carb, bad crankshaft seals, or a stiff metering valve diaphragm.
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO

  • Total Badges: 39
    Badges: (View All)
    Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary Fourth year Anniversary 5000 Posts Third year Anniversary
Re: 041 Farm Boss only runs with choke out
« Reply #2 on: November 17, 2013, 02:32:04 am »
Start with the cheaper things first like a fuel filter and fuel line.

I've back flushed bad fuel filters and made them work a while longer.

You can inspect the fuel line for cracks

Check the the carb is tight etc.
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

 

Related Topics

  Subject / Started by Replies Last post
0 Replies
841 Views
Last post March 11, 2011, 04:47:29 pm
by Cut4fun
13 Replies
1655 Views
Last post March 09, 2012, 01:51:34 pm
by eli-dream
14 Replies
935 Views
Last post June 08, 2014, 08:00:28 am
by jmester
13 Replies
775 Views
Last post September 27, 2015, 10:45:52 am
by maxmag
8 Replies
772 Views
Last post April 12, 2016, 12:37:06 am
by 67L36Driver
6 Replies
2142 Views
Last post July 05, 2016, 09:33:48 am
by Cut4fun .
5 Replies
1525 Views
Last post August 10, 2017, 11:40:53 am
by Spike47
2 Replies
403 Views
Last post August 17, 2019, 10:53:09 pm
by Midpines
2 Replies
465 Views
Last post June 15, 2020, 10:58:28 pm
by dpjones
0 Replies
518 Views
Last post December 07, 2020, 08:20:13 am
by Cut4fun .