Husqvarna Chainsaw Thread

[BayouCountryPowerSaws]

Is there a pop-up piston available for the 385 that you guys are aware of by chance? Additionally, the piston in my saw is a single ring, but all the OEM 54mm pistons I’m finding are 2 ring…think the extra drag will effect things much?

I only use one ring in a dual ring piston if it's a new kit.

 

[Wonka13]

I only use one ring in a dual ring piston if it's a new kit.

Make any changes to the ring gap, or just leave it be?

 

[Labfab]

I only use one ring in a dual ring piston if it's a new kit.

One ring only for me as well, for anything besides a stocker.

 

[Labfab]

Make any changes to the ring gap, or just leave it be?

Check it if you like, rule of thumb is .001" per 10mm of bore size. So between .005" and .006" in your case.

 

[Wonka13]

Perfect, thank you kindly!

 

[Wonka13]

Not that I've ever seen, would have to machine one.

Beyond my tool capability currently

 

[Dennisthemenace]

I only use one ring in a dual ring piston if it's a new kit.

On all rebuilds?

 

[Labfab]

Beyond my tool capability currently

Definitely understand buddy. Like I said earlier though, I'm here should you need any machining services. Kind of a specialty thing that most machine shops won't mess with.

 

[Labfab]

On all rebuilds?

Small cc example, but a good one. Flat topped the piston, cut the chamber, decked cylinder, ported. Has one ring, that is original to the saw. Has zero runtime after work.

 

[BayouCountryPowerSaws]

On all rebuilds?

I guess I should have been more specific lol. I use both rings on stock saws LOL I will also use both rings on used cylinders because the plating is already worn to two, but I don't know if that really matters or not.

 

[Wonka13]

I’ll be taking you up on that, Labfab…would really like to get this 385 turned into a torque monster

 

[Wonka13]

Small cc example, but a good one. Flat topped the piston, cut the chamber, decked cylinder, ported. Has one ring, that is original to the saw. Has zero runtime after work.

Now THAT’s some compression

 

[82F100SWB]

I may have gone overkill on this one... 55 Rancher, Hyway closed port top end, 028 Super piston...

I often omit the bottom ring as it gets in the way of my intake ports... Lol

My little old 026. Almost 3 year old build and it's my truck saw. Still blows 197...

 

[Wonka13]

I see the green goes all the way to 300psi though…

 

[Indiana.Doug]

What brand ignition is it running? I think they had some issues with certain ones.

Been gone for a bit, sorry for delay. I’ll need to look and see what’s there, I imagine the stock flavor.

 

[Wonka13]

AFleetCommand…he has an engineering type mindset, so he’s very detailed and meticulous…great resource!

 

[Idkanything]

Thank you sir!

 

[Wonka13]

Thank you sir!

You’re quite welcome!