« previous next »
Pages: [1] 2 3 4 5 6 ... 8   Go Down

Author Topic: Poulan 3450 Carb issues  (Read 2633 times)

0 Members and 0 Guests are viewing this topic.

Offline rockfishon

  • 4 cube
  • **
  • Posts: 59
  • Karma: 8
Poulan 3450 Carb issues
« on: October 06, 2014, 08:44:06 am »
Just finished replacing the tank assembly, now I need to tweak the carb. 

The saw will idle for about 10-15 seconds then bog down and die.  It will start right back up.   If I feather the throttle every few seconds it will idle forever.

So I leaned out the L needle up until the chain starts to moves. Much better, idles longer. But still dies.

If I turn the L needle in some more, it makes the chain move, I can turn the IDLE needle out some. It seems that I can't set the idle low enough with the low needle tuned.  It wont idle any lower, the chain still moves. BUT it will run like this for 3+ minutes.

Any Ideas guys? It has fresh fuel.
Logged

Share on Facebook Share on Twitter

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: Poulan 3450 Carb issues
« Reply #1 on: October 06, 2014, 10:23:16 am »
A air leak will cause them to idle fast

Do you have the idle speed screw all the way in? There's the "H" & "L" screws then there is a big idle speed screw
Logged
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 rockfishon

  • 4 cube
  • **
  • Posts: 59
  • Karma: 8
Re: Poulan 3450 Carb issues
« Reply #2 on: October 06, 2014, 11:55:54 am »
Yes, the large black screw.  I have the idle screw all the way out to the point that it does not change the idle speed.  I will check for a leak with some carbcleaner.
Logged

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: Poulan 3450 Carb issues
« Reply #3 on: October 06, 2014, 12:25:23 pm »
The leak is likely around the "boot" or rubber connector between the cylinder and carburetor.
Logged
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 Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 23515
  • Karma: 664
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Poulan 3450 Carb issues
« Reply #4 on: October 06, 2014, 01:15:38 pm »
Where is the L side set at?   Not the I idle

Have you put new diaphragms in the carb? Rebuilt.
Logged

Offline rockfishon

  • 4 cube
  • **
  • Posts: 59
  • Karma: 8
Re: Poulan 3450 Carb issues
« Reply #5 on: October 06, 2014, 02:24:03 pm »
The boot seemed flexible and sound when I swapped out the tank.  I will check again.  I have never had to rebuilt the carb.  Bought new in ~1998.  Maybe a symptom of something in the carb going south?

When I slowly lean out the L needle, the saw seems to run better and start to pick up rpm to the point where the saw seems to be running at 1/4 throttle.  Riching it out to bring the idle down, the saw seems to idle normally but then dies after 15-20 seconds.
Logged

Offline brokenbudget

  • Nitro Hotsaw
  • *******
  • Posts: 900
  • Karma: 67
  • Location: brockville ontario canada
Re: Poulan 3450 Carb issues
« Reply #6 on: October 06, 2014, 02:39:18 pm »
clean and rebuild the carb.
Logged
when I grow up, i wanna be an adult.

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: Poulan 3450 Carb issues
« Reply #7 on: October 06, 2014, 02:40:54 pm »
The "L" mixture needle should be used to make the engine run correctly at the lowest speeds.

The big idle speed screw should then be used to control the idle speed.  The correct idle speed is just slower than where the chain begins to spin.

I have a Poulan 3500 that is a lot like your 3450 (the same age) and I had to replace the carburetor diaphragms three years ago. I've had to replace the fuel filter in the tank three times over the years.
Logged
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 Eccentric

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2117
  • Karma: 217
  • Magnesium and Iron.
  • Location: Northwestern Wyoming
Re: Poulan 3450 Carb issues
« Reply #8 on: October 06, 2014, 04:39:17 pm »
Sounds like it could be another misbehaving HDA164....
Logged

Offline brokenbudget

  • Nitro Hotsaw
  • *******
  • Posts: 900
  • Karma: 67
  • Location: brockville ontario canada
Re: Poulan 3450 Carb issues
« Reply #9 on: October 06, 2014, 04:56:33 pm »
Quote from: Eccentric on October 06, 2014, 04:39:17 pm
Sounds like it could be another misbehaving HDA164....


I think he needs to rebuild it to rule that out considering he hasn't touched it since the saw was new. ;)
Logged
when I grow up, i wanna be an adult.
Pages: [1] 2 3 4 5 6 ... 8   Go Up
« previous next »
 

Related Topics

  Subject / Started by Replies Last post
Poulan 330 3450

Started by Cut4fun . « 1 2 ... 44 45 » Poulan

442 Replies
19201 Views 		Last post June 24, 2022, 07:37:03 am
by Cut4fun .
13 Replies
3851 Views 		Last post January 25, 2012, 07:21:50 pm
by Al Smith
5 Replies
1110 Views 		Last post February 21, 2012, 01:29:32 pm
by 660magnum
3 Replies
778 Views 		Last post February 03, 2013, 06:33:10 pm
by 660magnum
Poulan 3450 60cc

Started by Cut4fun . « 1 2 ... 6 7 » Poulan

66 Replies
3567 Views 		Last post February 08, 2018, 07:01:11 pm
by 3000 FPS
1 Replies
285 Views 		Last post January 07, 2014, 11:00:02 pm
by jmester
16 Replies
2101 Views 		Last post April 11, 2014, 07:03:51 am
by Tractorsaw1
17 Replies
1775 Views 		Last post September 15, 2014, 12:30:02 pm
by 660magnum
5 Replies
699 Views 		Last post October 23, 2014, 06:53:51 pm
by Cut4fun .
118 Replies
4398 Views 		Last post November 02, 2022, 09:52:21 am
by The Ripper