Decompression valve delete on a Stihl ms 460 magnum.

[MarkusO]

Hello everyone! Im new here. Recently I noticed that my competition saw a ms 460 magnum was running strange. When it was idleing it did like a puffing sound. So i tested the pressure and found out that the decomp valve is leaking.
Id like to plug it so i dont have to deal with it anymore.
Here in estonia only Husqvarna dealers have a specific bolt to plug the hole, stihl dealers dont have them, is it okay if i use the Husqvarna one on my cylinder? Has anyone tried that?
(Sorry for my spelling mistakes.)

 

[Bobby Kirbos]

Someone posted a YouTube video of what he considers manditory upgrades to the FarmerTech kit saws. He was working with a 660. One of his upgrades was to replace the FarmerTech decomp with an OEM Husqvarna decomp.

I can't say that it is 100% ok to do on your 460. However, the technical part of my brain tells me that if the threads are the same and the threaded section is the same length as (or shorter then) the Stihl, a Husqvarna decomp plug should work without issue.

Your shoulder may hate you, but that will end up being a different thread.

 

[catbuster]

Check the thread pitch, bolt size (including length) and pattern. Buy bolt that fits criteria. Apply blue Loctite, set bolt.

Done.

 

[HarleyT]

Check the thread pitch, bolt size (including length) and pattern. Buy bolt that fits criteria. Apply blue Loctite, set bolt.

Done.

A longer bolt is bad???

 

[catbuster]

A longer bolt is bad???

 

[HarleyT]

Well, a real long one would raise the compression ratio!!!

So my wife tells me......

 

[Bobby Kirbos]

Well, a real long one would raise the compression ratio!!!

So my wife tells me......

Compression ratio is only part of the equation. There is no replacement for displacement.

 

[Remle]

I’ve heard complaints about the anti vibe thing too.

 

[DND 9000]

Id like to plug it so i dont have to deal with it anymore.

Just use plug 1122 025 2200. It`s normally used for the pressure and vac test. Tightening torque is 25Nm.

 

[drf255]

It’s the same thread, Husky and Stihl.

The 460 has the special ignition coil with built in start retard. Easier starting than the 044 which has the dummy coil. So plugging it is fine.

 

[Gypo Logger]

Clean that area real well of carbon first before the install.

 

[MarkusO]

Thanks to everyone! The plug and a new cluch assembly are on the way!