Author Topic: 064 Hard Pull Question  (Read 476 times)

0 Members and 0 Guests are viewing this topic.

Offline blueberrymuzik

  • 3 cube
  • *
  • Posts: 17
  • Karma: 3
  • Location: SW MO
064 Hard Pull Question
« on: February 01, 2014, 02:47:26 pm »
This past week, I stumbled onto a retired logger in the area who had held back an 064 and several 064 parts when he sold out 10 years ago. He recently decided that he was never going back into the logging business, so I was able to buy it all. The 064 was intact, although it hadn't been started in 10 years. Before I bought it, I pulled on the starter and was amazed at the compression. When I got it home, I rinsed out the tank with fuel mix , then filled it about half full, and poured a tiny amount down the carb and gave her a pull. I found on the second pull that I wasn't going to be able to pull it barehanded. When it tried to fire, it jerked the rope out of my hand. After several more unsuccessful attempts, I put on a heavily insulated glove and managed to hang on and get it started briefly. I got to thinking maybe the muffler is stopped up, so I removed it. Didn't find anything. That also gave me a chance to see the piston and cylinder. They looked pristine. Decided to try to start it with the muffler off. It started on the first pull. This time it kept running and I ran it up to 8-10,000 rpm and watched as what appeared to be carbon deposits came flying out of the exhaust onto the shop floor. When I let off on the throttle, I found that it won't idle, which I expected because of the age of the impulse line, boot and seals. Once I put it all back together and pulled on the rope, it has what I would expect to be normal resistance in starting. I wish now that I had checked the compression when I first started. It is about 155 now.  Has anyone else experienced this?
I have a "few" work saws

Share on Facebook Share on Twitter


Offline jmester

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2066
  • Karma: 158
  • Location: MD
Re: 064 Hard Pull Question
« Reply #1 on: February 01, 2014, 03:28:42 pm »
I am having trouble and following what you are saying, 155 is good for saw with time on it. I would rebuild the carb, replace the fuel line, filter and impulse hose and see what happens with it.
FEAR NO TREE. FEAR GOD.

Offline jmester

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2066
  • Karma: 158
  • Location: MD
Re: 064 Hard Pull Question
« Reply #2 on: February 01, 2014, 03:33:06 pm »
Also check you carb adjustments.
FEAR NO TREE. FEAR GOD.

Offline blueberrymuzik

  • 3 cube
  • *
  • Posts: 17
  • Karma: 3
  • Location: SW MO
Re: 064 Hard Pull Question
« Reply #3 on: February 01, 2014, 03:34:20 pm »
That is my plan exactly. What I'm having trouble understanding is why it was almost impossible to start at first. It seemed as though it had 200+ pounds of compression. Once it finally started, it seemed to "blow the cob-webs out" and now is pretty reasonable to pull.
I have a "few" work saws

Offline mdavlee .

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 1968
  • Karma: 171
Re: 064 Hard Pull Question
« Reply #4 on: February 01, 2014, 07:58:54 pm »
It could have almost been seized up from the rings rusting. Now tat you got it moving the compression is a little low really and could use new rings.

Offline brokenbudget

  • Nitro Hotsaw
  • *******
  • Posts: 900
  • Karma: 67
  • Location: brockville ontario canada
Re: 064 Hard Pull Question
« Reply #5 on: February 01, 2014, 10:13:34 pm »
I would imagine it was left over old oil either from being fogged or from the last time it was ran. besides the (what ever the amount) fuel you dumped down the carb. no real mystery.
when I grow up, i wanna be an adult.

Offline Fish

  • Piped Saw
  • *****
  • Posts: 309
  • Karma: 39
Re: 064 Hard Pull Question
« Reply #6 on: February 03, 2014, 08:45:33 am »
Actually a lot of carbon built up in the combustion chamber will cause that problem, as it doesn't take much to kick the compression ratio way up.  And running without the muffler might have dislodged a bit of it.

I would pull the cylinder and clean the combustion chamber, as loose chunks of carbon can destroy a piston.

Offline blueberrymuzik

  • 3 cube
  • *
  • Posts: 17
  • Karma: 3
  • Location: SW MO
Re: 064 Hard Pull Question
« Reply #7 on: February 03, 2014, 09:23:41 am »
I now have all of the hoses, boot, seals, rings, and cylinder gasket on order. From what I can see of the piston and cylinder walls, they appear to be in excellent shape. I believe that Fish is right- the engine needs to come apart and the combustion chamber cleaned out before going any further. I'll post some pix as I get into it.
I have a "few" work saws

Offline jockeydeuce

  • 4 cube
  • **
  • Posts: 41
  • Karma: 7
Re: 064 Hard Pull Question
« Reply #8 on: February 04, 2014, 02:14:51 pm »
I agree with Fish.....A saw that has sat for that long, with unknown history, should be pulled down and checked over. Some seals, lines, base gasket and a set of rings are all a cheap investment. The 064 is a really fantastic saw.....I'm a big fan of them!

Offline Al Smith

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2760
  • Karma: 172
Re: 064 Hard Pull Question
« Reply #9 on: February 04, 2014, 02:41:43 pm »
Could be number of things all caused by sitting idle .I've got a 700 McCulloch I salvaged and made one from two .It was stiff and  must have taken three days to limber up with shots of WD-40 force fed it .After I got it fired up it limbered up .It didn't seem to hurt it as it runs fine .

 

Related Topics

  Subject / Started by Replies Last post
12 Replies
1422 Views
Last post December 11, 2014, 02:51:35 am
by Hoggwood
14 Replies
512 Views
Last post October 30, 2013, 08:41:27 pm
by president
80 Replies
2695 Views
Last post February 13, 2014, 02:37:33 pm
by mastercraftka
15 Replies
3054 Views
Last post February 28, 2017, 10:26:34 am
by Cmtrey
6 Replies
163 Views
Last post April 08, 2015, 11:39:15 am
by Randy
6 Replies
370 Views
Last post February 07, 2016, 12:49:11 pm
by Golvannon
16 Replies
1762 Views
Last post September 06, 2020, 09:55:48 pm
by Spike60
9 Replies
380 Views
Last post June 18, 2017, 08:25:10 pm
by Al Smith
13 Replies
421 Views
Last post October 13, 2017, 05:45:23 am
by mountainlake
3 Replies
1022 Views
Last post August 28, 2017, 05:16:25 pm
by 660magnum