Author Topic: Craftsman 3.7 oil leak  (Read 214 times)

0 Members and 0 Guests are viewing this topic.

Offline jcsmith

  • 5 cube
  • ***
  • Posts: 76
  • Karma: 7
  • Certified Shadetree Mechanic
  • Location: Northampton Co, PA
Craftsman 3.7 oil leak
« on: November 13, 2013, 04:38:05 pm »
Hey fella's, my Poulan made 3.7 has developed a bar oil leak recently. Full tank or half tank, if left overnight there will be a puddle under saw. Takes several days to get near empty . Two years ago I replaced the gaskets and diaphragm and it has worked fine until recent leak. The manual and auto are still working. I have not been able to  find leak. I replaced the cotter pin tank vent with a plastic tube vent that reaches across tank to opposite side , ( like a wild thing vent).  I probably should have left the cotter pin in tho.

     Has anyone run into this ? I appreciate any input.    Chris
As you slide down the Banister of Life, may the splinters point in the right direction

Share on Facebook Share on Twitter


Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: Craftsman 3.7 oil leak
« Reply #1 on: November 13, 2013, 05:31:19 pm »
Those puddles of oil when the old saw sets for a while has been the story of my life. To rebuild everything usually didn't fix it.
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 3000 FPS

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 4445
  • Karma: 273
  • Location: Carpenter, Wyoming
Re: Craftsman 3.7 oil leak
« Reply #2 on: November 13, 2013, 10:16:18 pm »
Can you pin point where the leak is.   For example is it coming from around the metal plate that holds the diaphragm. 

 I myself own close to 10 saws that use that type of oiler but I usually drain the oil when I am done using them because of leaks.   

   Also you can try and set the saw on a piece of cardboard and then check it in about an hour to help in finding where the leak is coming from.   

If it is coming from the oiler hole itself where the bar is then try opening the oil cap to release pressure from the oil tank and see if it stops leaking.
PP 505, 475, 445.

Offline jcsmith

  • 5 cube
  • ***
  • Posts: 76
  • Karma: 7
  • Certified Shadetree Mechanic
  • Location: Northampton Co, PA
Re: Craftsman 3.7 oil leak
« Reply #3 on: November 13, 2013, 10:53:09 pm »
I hear you on the leaks. I usually put it on cardboard just for that very reason.  I 'll have to wipe it down, put oil in and check.I usually clean it after every use, but didn't this time. I'll have to check the closure plate and pump for loose screws.  Thanks fella's,  Chris
As you slide down the Banister of Life, may the splinters point in the right direction

 

Related Topics

  Subject / Started by Replies Last post
7 Replies
428 Views
Last post November 09, 2011, 08:27:22 pm
by man of stihl
104 Replies
2287 Views
Last post June 05, 2019, 10:51:03 am
by Cut4fun .
3 Replies
239 Views
Last post February 17, 2014, 09:08:39 am
by KilliansRedLeo
9 Replies
725 Views
Last post November 15, 2014, 10:00:21 pm
by 3000 FPS
5100s air leak

Started by dolmar « 1 2 3 » Dolmar Makita

21 Replies
489 Views
Last post January 16, 2015, 04:12:20 am
by dolmarfan
8 Replies
214 Views
Last post June 05, 2015, 09:52:30 am
by Cut4fun .
1 Replies
191 Views
Last post May 01, 2016, 05:07:29 pm
by 660magnum
11 Replies
594 Views
Last post June 08, 2017, 12:33:19 pm
by lowvirtualmemory
6 Replies
253 Views
Last post June 21, 2017, 10:37:29 am
by chainsawlady
1 Replies
117 Views
Last post February 13, 2018, 06:51:07 am
by Cut4fun .