« previous next »
Pages: [1] 2   Go Down

Author Topic: improving Grubb screw type vents  (Read 2630 times)

0 Members and 41 Guests are viewing this topic.

Offline

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172

    • Total Badges: 25
    Badges: (View All)
    Fourth year Anniversary Third year Anniversary 1000 Posts Second year Anniversary Level 5 500 Posts
improving Grubb screw type vents
« on: October 26, 2015, 11:07:22 pm »
[img http:///img]

Trying to figure out a no leak tank vent to retrofit the older grub screw type on older saws. Found a R/C valve that works for a while then the gas eats the flapper material.  Anyone know of a similar sized check valve that's gas proof??


Logged

Share on Bluesky Share on Facebook

Offline

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 4709
  • Karma: 320
  • Location: Carpenter, Wyoming

    • Total Badges: 43
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Level 7 Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary
Re: improving Grubb screw type vents
« Reply #1 on: October 26, 2015, 11:54:56 pm »
The only other ones I know of are the ones I see on the Echo and Shindiawa weed trimmers.
Logged
PP 505, 475, 445.

Offline

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172

    • Total Badges: 25
    Badges: (View All)
    Fourth year Anniversary Third year Anniversary 1000 Posts Second year Anniversary Level 5 500 Posts
Re: improving Grubb screw type vents
« Reply #2 on: October 27, 2015, 09:47:19 am »
Thanks, I'll take a look at them
Logged

Offline

  • 6 cube
  • ****
  • Posts: 288
  • Karma: 94
  • Location: IA

    • Total Badges: 22
    Badges: (View All)
    Third year Anniversary Level 5 Second year Anniversary 100 Posts Topic Starter Search
Re: improving Grubb screw type vents
« Reply #3 on: October 27, 2015, 10:12:55 am »
Shouldn't there be a flapper check valve pulled into the tank? All you need on the line is something to keep debris out.
Logged

Offline

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172

    • Total Badges: 25
    Badges: (View All)
    Fourth year Anniversary Third year Anniversary 1000 Posts Second year Anniversary Level 5 500 Posts
Re: improving Grubb screw type vents
« Reply #4 on: October 27, 2015, 12:04:01 pm »
Shawn, I'll check. This one had two grub screws in it
Logged

Offline

  • 6 cube
  • ****
  • Posts: 288
  • Karma: 94
  • Location: IA

    • Total Badges: 22
    Badges: (View All)
    Third year Anniversary Level 5 Second year Anniversary 100 Posts Topic Starter Search
Re: improving Grubb screw type vents
« Reply #5 on: October 27, 2015, 02:05:42 pm »
Some stihl models should be a rubber umbrella flapper inside the tank with the tit pulled into the breather boss area. They are the exact same umbrella flapper used in accelerator pumps in holley and edelbrock carbs. This keeps anything from leaving the tank, then the line has grub screws to keep the debris out.

Logged

Offline

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172

    • Total Badges: 25
    Badges: (View All)
    Fourth year Anniversary Third year Anniversary 1000 Posts Second year Anniversary Level 5 500 Posts
Re: improving Grubb screw type vents
« Reply #6 on: October 27, 2015, 02:28:57 pm »
Yep, bought a couple dozen of those last month for about 50 cents each!!   Stihl was about $8.

 Not sure if this early 044 tank has one of the umbrella check valves like the later tanks.  I'll check tonight
Logged

Offline

  • Piped Saw
  • *****
  • Posts: 328
  • Karma: 28

    • Total Badges: 18
    Badges: (View All)
    Third year Anniversary Karma Good Level 4 Second year Anniversary Poll Voter One year Anniversary
Re: improving Grubb screw type vents
« Reply #7 on: October 27, 2015, 04:11:12 pm »
echo type vents $1.89 at carbtech21
Logged

Offline

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172

    • Total Badges: 25
    Badges: (View All)
    Fourth year Anniversary Third year Anniversary 1000 Posts Second year Anniversary Level 5 500 Posts
Re: improving Grubb screw type vents
« Reply #8 on: October 29, 2015, 12:15:51 pm »
Shawn, saw IS set up for an umbrella vent but missing. Put a new one in!!  Nightmare to pull through as the tube is Sooooo small. Used small hemostats.

Carburetor umbrella and Stihl appear identical less the mfg markings
Logged

Offline

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172

    • Total Badges: 25
    Badges: (View All)
    Fourth year Anniversary Third year Anniversary 1000 Posts Second year Anniversary Level 5 500 Posts
Re: improving Grubb screw type vents
« Reply #9 on: October 29, 2015, 12:17:01 pm »
Stihl on right



[img http:///img]
Logged
Pages: [1] 2   Go Up
« previous next »
 

Related Topics

  Subject / Started by Replies Last post
9 Replies
3531 Views 		Last post April 26, 2011, 04:43:54 pm
by rick
6 Replies
1610 Views 		Last post December 28, 2013, 08:58:55 am
by treeslayer2003
6 Replies
4605 Views 		Last post February 12, 2014, 09:38:10 pm
by farmboy
15 Replies
3273 Views 		Last post February 20, 2014, 09:34:42 am
by KilliansRedLeo
23 Replies
3492 Views 		Last post April 17, 2014, 04:37:58 am
by KilliansRedLeo
0 Replies
1133 Views 		Last post December 20, 2016, 06:35:52 pm
by fisaw
3 Replies
1907 Views 		Last post April 14, 2017, 08:05:43 am
by Cut4fun .
1 Replies
1474 Views 		Last post January 01, 2020, 04:41:46 pm
by Old Iron Logging
2 Replies
2431 Views 		Last post May 22, 2025, 01:38:54 pm
by Le Maisonniau
0 Replies
30 Views 		Last post August 17, 2026, 09:29:54 am
by Cut4fun .