Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Poulan => Topic started by: Cut4fun . on January 11, 2020, 09:53:46 am

Title: Poulan 4000 aftermarket
Post by: Cut4fun . on January 11, 2020, 09:53:46 am
Posted on chainsaw repair group. Saving pics here.   Trying to get 4000 piston pics now. Poulan 4000 cylinder

Not me seller on chainsaw repair group FB.  =

Look fellas, we're in the process of developing a copy of the widely regarded Poulan 4000 cylinder.  These are like a big bore kit for Poulan 3400, 3700, 3800, Craftsman 3.4 and 3.7 vintage classic chainsaws.  As well as the Poulan 4000.  These will take a 3400 from about 54cc up to 65cc.  These are true to for with a 1-15/16th bore.
We've already put together the top end gasket sets for them, developed a tool to help pull the wrist pins easily, and purchased the casting molds for the cylinder (Hence our insignia on the cylinder). Now comes time to test them out in the field. 

We think they're going to be awesome!!

They are chrome plated, like the original but we've made some small changes.  We've adapted the hardware to metric sizes and each kit will come packed with the 4x muffler screws and 2x intake screws to help facilitate the modification.  We've also modified the intake and 2 longer exhaust screws to socket cap for simplicity of installation.

I need some real world feedback.  I have one test cylinder left to send out here.  Would someone be interested in trying this out and putting some hours on it?

We are still working to get the piston we're developing right so for now we will ship the cylinder with either a used OEM or Lil Red Barn piston.  I will also ship with a sample of our piston so you can see the quality, but they aren't suitable yet to run.

We're looking at having them ready for sale by the summer time if all goes well.

If you decide you want to check it out I really need to hear back from you on it in a reasonable time frame. Anyone interested in checking one out?

Title: Re: Poulan 4000 aftermarket
Post by: Efisher26 on January 11, 2020, 10:31:13 am
I have a 3400 (craftsman 3.4) if itís the same I can throw one on, I have some large willow trunk to test cut


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Title: Re: Poulan 4000 aftermarket
Post by: Cut4fun . on January 11, 2020, 11:23:04 am
I have a 3400 (craftsman 3.4) if itís the same I can throw one on, I have some large willow trunk to test cut


Sent from my iPhone using Tapatalk

It's not me. Folks in line offering to test. You need your 4000 piston or aftermarket one to use. He said his not ready yet.
Title: Re: Poulan 4000 aftermarket
Post by: 3000 FPS on January 11, 2020, 11:36:58 am
Wow that sounds pretty cool.    The cylinder looks like it was made very well.    If they do the pistons and rings with just as much care they could have a winner on their hands considering how many Poulan 3400,3700, and 4000's that are out there. 

I have some 3400's myself laying around here that I done nothing with.
Title: Re: Poulan 4000 aftermarket
Post by: Cut4fun . on January 11, 2020, 03:46:42 pm
Wow that sounds pretty cool.   

I suggested to him 380 3750 cyl, 365 3500 cyl, pistons are same.  Also 505 2083 54mm cyl and 5200 5400 8500 cyl p etc.
Title: Re: Poulan 4000 aftermarket
Post by: Cut4fun on January 12, 2020, 08:43:37 am
Still working on the pistons.  poulan 4000 piston 1.2mm rings.  aftermarket


more pics of cylinder too





Title: Re: Poulan 4000 aftermarket
Post by: Cut4fun . on January 12, 2020, 02:12:09 pm
Forgot to post the pin tool he has for them already.  Priced right too. ;)



Title: Re: Poulan 4000 aftermarket
Post by: ChipsFlyin on January 13, 2020, 01:46:32 pm
That is so awesome!
Title: Re: Poulan 4000 aftermarket
Post by: msmmce1 on January 14, 2020, 01:12:06 pm
I have that tool, it works great!
Title: Re: Poulan 4000 aftermarket
Post by: ssidwell on January 14, 2020, 06:17:01 pm
Would be nice to see a 5400, wouldn't be scared to run my more often.
Title: Re: Poulan 4000 aftermarket
Post by: Duke Thieroff on January 16, 2020, 07:01:32 am
Hey Guys!

This is Chris Thieroff and I'm the guy developing these cylinders.

If you have any questions feel free to ask.

Just to be clear, we are developing our own piston for these and are only using the LRB for testing purposes because our piston is still in development
Title: Re: Poulan 4000 aftermarket
Post by: 3000 FPS on January 16, 2020, 10:18:05 pm
Looking good Chris from what I have seen so far.  I probably have 10 or 12 of the countervibe saws. 
Title: Re: Poulan 4000 aftermarket
Post by: redunshee on January 20, 2020, 06:14:13 am
Still working on the pistons.  poulan 4000 piston 1.2mm rings.  aftermarket


more pics of cylinder too


Will he be using a wrist pin bearing?   OEM piston has the bearing built in.
Title: Re: Poulan 4000 aftermarket
Post by: pete on January 21, 2020, 06:40:49 am
Good luck with these I will be watching with interest do you have a price guide yet
Title: Re: Poulan 4000 aftermarket
Post by: Cut4fun . on January 21, 2020, 08:39:41 am
Todd on test unit. = Speaking of the 4000 I took a 3400 apart and put the 4000 cylinder kit on it and have been running it on the dino. The saw is running good and the kit was easy to install, all the bolts and gaskets came with it. The saw is running rich now and will stay that way for the first tank of fuel. This is going to be so neat when they are 4 sale. Everyone is going to want one.
Title: Re: Poulan 4000 aftermarket
Post by: Cut4fun . on January 22, 2020, 08:37:56 am
Todd = Ran the 4000 again today and put a tank of fuel thru it. I pulled the muffler cover and it looks like it was brand new. Was happy with the little red barn piston. I'm using truefuel in the green can. I let Chris in on the progress and he was excited also. On the dino I was pumping 100 psi at 8000 rpm and that is good. It is getting stronger as more time goes on
 
Chris = Yep, definitely excited to hear more about the results.
Also glad to hear that everything is holding up well. Those LRB pistons are OK, but I have a feeling "The Duke's" one we're having produced will be a little more refined.
 I'm dying for a video
Title: Re: Poulan 4000 aftermarket
Post by: Cut4fun . on January 22, 2020, 03:56:59 pm
Todd = Yes I slowed the pump down and added a tachometer and a few others. On the video the saw is 8000 rpm and 100 psi, it will pump 150 psi and stay at 8000. Strong saw
 
https://youtu.be/4CjzGCJJFRg
Title: Re: Poulan 4000 aftermarket
Post by: redunshee on January 23, 2020, 07:17:16 am
Todd = Yes I slowed the pump down and added a tachometer and a few others. On the video the saw is 8000 rpm and 100 psi, it will pump 150 psi and stay at 8000. Strong saw



What piston are you using? Still have a question on the wristpin bearings for Duke's piston.
Title: Re: Poulan 4000 aftermarket
Post by: Cut4fun . on January 23, 2020, 08:06:42 am
Todd = Yes I slowed the pump down and added a tachometer and a few others. On the video the saw is 8000 rpm and 100 psi, it will pump 150 psi and stay at 8000. Strong saw



What piston are you using? Still have a question on the wristpin bearings for Duke's piston.

Pretty sure Todd mentioned he was testing with the LRB piston kit in it. Read back some.

Chris was saying the pin bearings might be included in his kits. Still not sure.   

But he does sell them right now on his website for 15 a set.  https://www.sawsalvage.co/products/new-pair-oem-style-poulan-3400-3700-3800-4000-piston-pin-bearings?_pos=1&_sid=3ddbaf3e9&_ss=r

Todd = Ran the 4000 again today and put a tank of fuel thru it. I pulled the muffler cover and it looks like it was brand new. Was happy with the little red barn piston. I'm using truefuel in the green can. I let Chris in on the progress and he was excited also. On the dino I was pumping 100 psi at 8000 rpm and that is good. It is getting stronger as more time goes on
 
Chris = Yep, definitely excited to hear more about the results.
Also glad to hear that everything is holding up well. Those LRB pistons are OK, but I have a feeling "The Duke's" one we're having produced will be a little more refined.
 I'm dying for a video
Title: Re: Poulan 4000 aftermarket
Post by: Cut4fun on January 27, 2020, 08:20:42 am
Todd doing a 360 view for you of the chainsaw dyno he made

https://youtu.be/SUlyhjIfGxY
Title: Re: Poulan 4000 aftermarket
Post by: Datman on November 03, 2020, 08:16:05 am
Hello from Tassie, sorry my first post. I was wondering if these were available yet. I managed to get my hands on a 3400 that needs restoration. Larger Poulan, Homelite and pioneer are hard to get your hands on down here and if you find one you have to lose a kidney.
This looks like an awesome alternative. Is there a price on a kit yet?
Cheers
Title: Re: Poulan 4000 aftermarket
Post by: Cut4fun on November 03, 2020, 10:14:59 am
Not yet. CV-19 slowed up everything happening.