Chainsaw Repair

The Poulan 3800 is 61cc.
The Poulan 3700 is 60cc

Poulan 3800 has two thick rings and a chrome piston with a bare cylinder.
Poulan 3700 has two thin rings and comes with a chrome cylinder and bare piston.

The Poulan 3800 will run on average around 125 psi on the compression.
The Poulan 3700 will run on average around 150 psi on the compression.

I have seen both saws with higher compression but it is not the norm.

All the anti vibe are the same.

I have modified both saws and the 3700 is always a lot stronger saw.   
I do have two 3800 saws and both have had the cylinders lowered so the compression is now 140 to 150 psi.
They are good firewood saws and I have used them for bucking and noodling up logs.

The 3700 I modified runs strong enouph to use a 24" bar with no problem.   I tacked it at 13,500 out of the cut.

Oilers are the same.

The 3800's I have both use the plastic clutch cover where as the 3700's use a mag clutch cover.
I do not know if that is the norm or not.

The 3700's use a vented or louvered air filter cover and the 3800's sometimes use the type of cover as on 3400.  No vents.

As usual my cheap camera has green fubarred. 

As it came in no clean up.

My 4000 had a plastic clutch cover. Dont know if it was right one or not.

Oh 3800 has 3.7 on it too.  What would make the same bore and stoke saws 3700 3800 be different cc 60 v/s 61?  Unless bore is smidgen different?

My 4000 has a wide plastic clutch cover.  Still has the 4000 decal, so it is probably original. 

Right at the 140psi Roger Just at the left side of line marker Over 138 but not hard on 140.

Under cover like new. Carb shiney silver, air filter looked like new. Looking through plug hole looked like new.

Dumped old mix, rinsed tank twice. Fueled up popped 3 pull. Running at sounds gooooood.   

Another lucky take in.