Author Topic: ALL HAIL THE POULAN 3400 'S!!  (Read 2526 times)

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Offline brokenbudget

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ALL HAIL THE POULAN 3400 'S!!
« on: February 26, 2011, 02:59:27 pm »
hey guys and galls first post here ;D
started this project early last summer and haven't been able to get back at it. bare with me, my comp and camera are acting up and i can't find a few pics ::):


roughing in:



the intake is a little constricted:

when I grow up, i wanna be an adult.

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Offline brokenbudget

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Re: ALL HAIL THE 3400'S!!
« Reply #1 on: February 26, 2011, 03:07:06 pm »
a few more:

impulse port for carb:

a little bigger carb ;):


 all fit under the covers:



didn't do alot with the port timing (can't remember the #'s). i dropped the cyl. 28 thou and ended up with a squish of just under
21 thou (stock it was 52 thou-ouch) with gasket. brought the transfers back up, didn't touch the intake timing, just widened, as with the exhaust.




when I grow up, i wanna be an adult.

Offline brokenbudget

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Re: ALL HAIL THE 3400'S!!
« Reply #2 on: February 26, 2011, 03:23:48 pm »
the one thing i found with these saws is the timing is way retarded. i ended up putting slots in the coil and i gave it about another 3 degrees total advance. that right there woke it up a bit.
compression went up from 125psi. to 148-150-ish (which seems like a pretty big jump?) and you can tell when you have the starter in your hand :D
these saws are set to about 11500-12000rpm stock, and this one was sounding lean at 11000rpm before the work.
i ended up splitting it and changing out the bearings and seals and resealed it up with good old 1194. now it'll 4stroke at around 13500-13700rpm and pulls very well in the cut. however it ended up starting to go lean on me again and i set it on the shelf for 'later' as i had a few other projects i needed to get at.
these are about the best firewood saw out there.
now onto the 3700 ;D
when I grow up, i wanna be an adult.

Offline Cut4fun

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Re: ALL HAIL THE 3400'S!!
« Reply #3 on: February 26, 2011, 03:34:03 pm »
Is this what a 4000 looks like inside too?  I just picked one of those up on trade.

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Offline brokenbudget

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Re: ALL HAIL THE 3400'S!!
« Reply #4 on: February 26, 2011, 04:13:35 pm »
they're the same saw, just different cc. . the 4000 is the chrome piston alloy cyl. and thick rings, like the 3400 but 65cc. good saw.
i haven't had any problems with the chrome piston and bare cylinder on these and i have a few around here that i take care of that get run very hard by people that shouldn't own tools. yes, even one person who likes to run atf as a 2stroke oil when he runs out of the proper stuff :-X

EDIT: kevin, the cyl is chromed and the piston is alloy. i'm getting these top ends screwed up.... nothig new :D
when I grow up, i wanna be an adult.

Offline Cut4fun

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Re: ALL HAIL THE 3400'S!!
« Reply #5 on: February 26, 2011, 04:15:46 pm »
one person who likes to run atf as a 2stroke oil  :-X

Never heard of that one. How did that work out?  ;D
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Offline brokenbudget

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Re: ALL HAIL THE 3400'S!!
« Reply #6 on: February 26, 2011, 04:26:22 pm »
seems to be not too bad. he says he's dun it a million times over the years. i tell him he should just buy more 2stroke oil. he laughs and says if the saw was to blow up from it, it would have done it by now. he's owned it since new back in '81 or '82. the cylinder and front of piston looks pretty good through the exh. port. never had it torn down, yet.
when I grow up, i wanna be an adult.

Offline Cut4fun

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Re: ALL HAIL THE 3400'S!!
« Reply #7 on: February 26, 2011, 04:32:29 pm »
That wasnt what I was excepting for a reply.  :o  But cool for him.
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Offline brokenbudget

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Re: ALL HAIL THE 3400'S!!
« Reply #8 on: February 26, 2011, 04:36:19 pm »
That wasnt what I was excepting for a reply.  :o  But cool for him.

lets just say most of his stuff is being held together with the proverbial spit and gum, probably on purpose. not many left like him. thank gawd.
when I grow up, i wanna be an adult.

Offline Eccentric

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Re: ALL HAIL THE 3400'S!!
« Reply #9 on: December 12, 2012, 02:01:51 am »
Dragging back up an old thread.  Didja ever get into it again?  Ever shoot a vid? What carb is that?
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

 

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