Nik's Poulan Thread

[Jethro 2t sniffer]

All mag case on those The only diff between a 3400 and a 4000 is the P&C, the AF set up, The starter pulley and flywheel pawls and the side port in the muffler.

Was meaning the plastic shroud on top and the sneaky wee spacer under it

 

[s sidewall]

I know this has probably already been discussed in this thread before but I guess I just couldn’t find the right combination of words for it to come up through a search. What is the best way to remove the crank seals in a 3400? I did a pressure test and it held over 7 psi no problem. As soon as I try to pull a vacuum on it the gauge immediately drops. I haven’t tried squirting the soapy water on it yet. Just ran out of time and I’ll try that tomorrow. I’m hoping it’s something simple like the cylinder base gasket. It’s currently a gasket that I made but isn’t the best because I don’t have hollow punches to make the bolt holes. I have a new one now that I’m gonna try before anything else. I’m hoping it’s not the seals but wanted to know the best way to remove them regardless. Is it really that common for a saw to hold pressure so well and then be so drastically opposite when pulling a vacuum?


Joseph Huckabaa

I just drill a small hole and use a sheet rock screw and vice grips and pop the seals right out.

Steve Sidwell

 

[s sidewall]

Installing fw side is easy cause of the taper, clutch side is stepped so you will need to build it up a little so the seal will go on.

Steve Sidwell

 

[s sidewall]

I have admit, that 3400 is pretty darn fast. Smokes my saws

Steve Sidwell

 

[Todd Loosli]

So someone post some links to the fast 3400 ,might be a fun winter project. Can't be any harder than a 60 pound steam engine from scratch maybe easier cuz only one cylinder and you can find the p and c

 

[Jethro 2t sniffer]

So someone post some links to the fast 3400 ,might be a fun winter project. Can't be any harder than a 60 pound steam engine from scratch maybe easier cuz only one cylinder and you can find the p and c

I can't post them because there on "the dark side" O,,P,,E. But.. search up poulan 3400 3700 4000 stroked crank.

It's a hell of a project. Maybe he would be interested in sharing some numbers and dimensions.

 

[EngineNoO9]

So someone post some links to the fast 3400 ,might be a fun winter project. Can't be any harder than a 60 pound steam engine from scratch maybe easier cuz only one cylinder and you can find the p and c

https://mfrindustries.com/poulan-3400-countervibe-race-chainsaw-project/

He posted most all of the info that would be required to build something similar provided you have the tooling and know how to do it all. Plus getting parts.

 

[Jethro 2t sniffer]

https://mfrindustries.com/poulan-3400-countervibe-race-chainsaw-project/

He posted most all of the info that would be required to build something similar provided you have the tooling and know how to do it all. Plus getting parts.

Thaaank you man I read all that months ago but I couldn't bloody find it all I was getting was the O,P,E stuff.

 

[EngineNoO9]

it'd be an awesome project provided you have time and tools. Maybe someday...

 

[Jethro 2t sniffer]

Need to make it fit a common aftermarket cylinder too

 

[Todd Loosli]

What saws are running 56mm bore or bigger. I don't think it would be difficult to build. Just have to get the math correct. Numbers all have to add up right, then it will bolt together. What carb is running on a 100+ cc saw that is easy to work on.
I'm limited on the saws that I know anything about

 

[Todd Loosli]

https://www.hlsproparts.com/product-p/h30395-b-dns.htm
This might be a start

 

[Modifiedmark]

https://www.hlsproparts.com/product-p/h30395-b-dns.htm
This might be a start

Partner 100cc saws like a P100 were 56mm and so were a lot of the cutoff saws. Pistons and cylinders are plentiful for the cutoff saws.

 

[EngineNoO9]

I’d be happy with a solution that would allow me to get 70-80cc with a 3700 crankcase.

 

[3000 FPS]

Poulan 505 I believe is 52mm and a Stihl 660 and that will get you into the 83 cc range. I do not know what the stroke is for those saws.

 

[RedneckChainsawRepair]

Poulan 505 I believe is 52mm and a Stihl 660 and that will get you into the 83 cc range. I do not know what the stroke is for those saws.

54mm x 36mm I believe for stroke.

 

[3000 FPS]

54mm x 36mm I believe for stroke.

my mistake. Is it the 475 that is 52mm.

 

[RedneckChainsawRepair]

my mistake. Is it the 475 that is 52mm.

Yep. 48-50-52-54 all same stroke 36.

 

[EngineNoO9]

Are cylinders easy to come by? That’s the biggest issue....

 

[Todd Loosli]

I don't think so, as I remember J J had a few and sold them to people that were in need of them.