FOUND IT Ms460 cylinder

[Canadian farm boy]

Thread '046 cylinder identification'

Jun 1, 2017

There as been some discussion lately with reference to the 046 cylinders.
Last night I took a look at a couple cylinders I have. I found several physical differences with the cylinders that may make it easier for everyone to identify which style cylinder they have on their saw. Hemi cylinder vs a D cylinder.

A D cylinder has a D shaped combustion chamber
A hemi cylinder has a round combustion chamber.
Pics for chamber shape reference

This is a D chamber
This is a hemi chamber

• Canadian farm boy
• Replies: 57
• Forum: Chainsaws

• 

The D chamber mahle cylinders only came on the very early production 046.

 

[Woodwackr]

Thread '046 cylinder identification'

Jun 1, 2017

There as been some discussion lately with reference to the 046 cylinders.
Last night I took a look at a couple cylinders I have. I found several physical differences with the cylinders that may make it easier for everyone to identify which style cylinder they have on their saw. Hemi cylinder vs a D cylinder.

A D cylinder has a D shaped combustion chamber
A hemi cylinder has a round combustion chamber.
Pics for chamber shape reference

This is a D chamber
This is a hemi chamber

• Canadian farm boy
• Replies: 57
• Forum: Chainsaws

• 

The D chamber mahle cylinders only came on the very early production 046.

any ideas on his no-name cylinder? clone? I've never seen one like that but I haven't seen many

 

[Canadian farm boy]

any ideas on his no-name cylinder? clone? I've never seen one like that but I haven't seen many

IMO he has a Stihl branded jug.

 

[whybother]

Thread '046 cylinder identification'

Jun 1, 2017

There as been some discussion lately with reference to the 046 cylinders.
Last night I took a look at a couple cylinders I have. I found several physical differences with the cylinders that may make it easier for everyone to identify which style cylinder they have on their saw. Hemi cylinder vs a D cylinder.

A D cylinder has a D shaped combustion chamber
A hemi cylinder has a round combustion chamber.
Pics for chamber shape reference

This is a D chamber
This is a hemi chamber

• Canadian farm boy
• Replies: 57
• Forum: Chainsaws

• 

The D chamber mahle cylinders only came on the very early production 046.

Thanks for the info CFB. I have to admit I was a bit confused when it was marked Stihl and didn't have mahle or ks on it anywhere.
It is a hemi chamber jug.

 

[MustangMike]

As stated, Stihl used various cylinders on their saws. You can use a 046 or 460 jug on any 046 or 460 saw, they are interchangeable.

Port timing and squish were all over the place with both 046 and 460 jugs, so it is always a good idea to check the #s when doing a build.

On 044s, IMO, some of the best cylinders were KS. Note: All 044 and 440s have D combustion chambers.

As mentioned, only early 046s had D combustion chambers, and the early 046 (true) Magnums (that came from the factory with dual port mufflers) were said to be among the strongest 046/460s from the factory. They also had "richer" carbs with an .070 jet.

Note: The EPA soon banned the dual port mufflers, but Stihl noticed that the "Magnum" designation sold saws, so they started using it on MS460s that did not have any performance advantage. I don't think Stihl gave the original 046 Magnums a higher HP # in their literature, but the early 066 Magnums (which also had a DP muffler) were rated 1/2 Hp higher than the ordinary 066s.

 

[Woodwackr]

As stated, Stihl used various cylinders on their saws. You can use a 046 or 460 jug on any 046 or 460 saw, they are interchangeable.

Port timing and squish were all over the place with both 046 and 460 jugs, so it is always a good idea to check the #s when doing a build.

On 044s, IMO, some of the best cylinders were KS. Note: All 044 and 440s have D combustion chambers.

As mentioned, only early 046s had D combustion chambers, and the early 046 (true) Magnums (that came from the factory with dual port mufflers) were said to be among the strongest 046/460s from the factory. They also had "richer" carbs with an .070 jet.

Note: The EPA soon banned the dual port mufflers, but Stihl noticed that the "Magnum" designation sold saws, so they started using it on MS460s that did not have any performance advantage. I don't think Stihl gave the original 046 Magnums a higher HP # in their literature, but the early 066 Magnums (which also had a DP muffler) were rated 1/2 Hp higher than the ordinary 066s.

Higher, actually. My ‘92 RE 066 stats…from Stihl’s literature at the time, are 7.8hp. The same stat sheet shows 7.0 hp for single port muffler 066s.