MS441 R C-M M-Tronic Review and Mods

[TK]

Now lets open a can of worms here. Other than the numbers the manufactures put in their literature, has anyone actually tested the fuel efficiency of strato engines?? I'm starting to think the numbers are inflated, we already know the weight numbers are off.opcorn:

This isn't a comparison between the above mentioned saws, but a similar combination. I did some cutting this morning with a buddy, I ran my 365sp with a MM and he ran his 570 stock. I was running an 18" bar to his 24" bar. The wood was 3+ feet in diameter. The 570 made far more cuts than my 365 on a tank of fuel.

 

[albert]

The strato saw are more thrifty on fuel. The regular MS441 will use way less fuel than a stock MS460. IIRC the MS460 holds a few oz's more than a MS660. The MS 460 is one thirsty saw. It's a good thing it's such a good performer

 

[blsnelling]

The 7900 is different than the Husky mount. You have to mod Bailey's adapter to work on a 7900.

Have you modded the muffler on the 576? That's likely some of the difference.

 

[spike60]

The 576 has more potential and should catch up after some more break in time. They're really not all that impressive out of the box.

Anybody notice that we are enjoying two saws that nobody gave a hoot about two years ago? They were two of those "new fangled" strato saws that we didn't like, remember?

 

[Officer's Match]

Yeah, I have been anxiously awaiting just this very comparison. I wonder which will get the most benefit out of porting? Since the 576 already has the grunt, I'm thinking more rpm's will make it interesting...

 

[blsnelling]

By the same token, similar is said about the 441 as well. I think someone said 10-15 tanks.

 

[mdavlee]

I think the new technology on these saws is pretty nice. I cut from 500ft to around 3500ft and at the higher places the saws run real rich if not retuned. This 576 will take care of that now.

 

[Philbert]

Anybody notice that we are enjoying two saws that nobody gave a hoot about two years ago? They were two of those "new fangled" strato saws that we didn't like, remember?

Didn't have AutoTune / M-Tronic 2 years ago.

Philbert

 

[mdavlee]

Didn't have AutoTune / M-Tronic 2 years ago.

Philbert

The 441 and 576 have been around that long but not with the electronic versions.

 

[spike60]

Didn't have AutoTune / M-Tronic 2 years ago.

Philbert

Actually the 576AT was out two years ago. But the 575 was still on peoples minds, and it's taken a while for the 576AT to distance itself from that "legacy".

 

[Officer's Match]

I gotta' think a 390XP in AutoTune or a MS660 in M-Tronic would be oh so sweet...

 

[mdavlee]

I heard some of the 661s being tested had the m tronic. Who knows what all saws will end up with the systems.

 

[albert]

The 576 has more potential and should catch up after some more break in time. They're really not all that impressive out of the box.

Anybody notice that we are enjoying two saws that nobody gave a hoot about two years ago? They were two of those "new fangled" strato saws that we didn't like, remember?

I agree, I think the break in process is alittle more envolved on these "smart" saws due to the electronics adapting to constantly changing mechanical aspecst of breaking in. I think 15 tanks or so would be normal break in on these saws.

 

[Andyshine77]

I agree, I think the break in process is alittle more envolved on these "smart" saws due to the electronics adapting to constantly changing mechanical aspecst of breaking in. I think 15 tanks or so would be normal break in on these saws.

You may be right. The 441 is getting ample fuel at all times, if you lift up on it she will four stroke right now. The 576 on the other hand, well I'm not really liking the tune so far, seems a bit lean IMHO, it surly doesn't seem to adjust the tuning on the fly like the 441.

 

[Andyshine77]

How does the 576 react if you lean on it? I know the 441cm responds with "more power" I would be nice let both saws fully run in to their full potential and then compare.

Well it does fine, but it doesn't feel like it's shifting gears like the 441. This could mean two things. One the 441 has a better faster adjusting system, or the 576 system is more refined and it's harder to feel the change.

 

[Andyshine77]

This isn't a comparison between the above mentioned saws, but a similar combination. I did some cutting this morning with a buddy, I ran my 365sp with a MM and he ran his 570 stock. I was running an 18" bar to his 24" bar. The wood was 3+ feet in diameter. The 570 made far more cuts than my 365 on a tank of fuel.

TK I hear what you're saying, but let me ask you this. Has the carb on the 570 been tuned since it was purchased? I ask because I've seen no difference between the two auto tune saw I have here right now and my 7900. The two strato saws that I personally own were extremely lean out of the box, this may have more to do with the fuel savings than the saw being strato charged.

Now what do you all say about me running my stock 7900 in the same log as the 441 and 576? or should I keep this purely between the 441 and 576?

 

[albert]

Well it does fine, but it doesn't feel like it's shifting gears like the 441. This could mean two things. One the 441 has a better faster adjusting system, or the 576 system is more refined and it's harder to feel the change.

I hear ya, but when dogged, it in does it hold the rpms as well as the 441cm? My guess is that it would "learn" better if you put a moderate load on it while breaking in. It may not "learn" as well or as quickly if most cuts are made with no or little presure applied. Just my 2 cents, not claiming to be an expert on the matter.

 

[Andyshine77]

I hear ya, but when dogged, it in does it hold the rpms as well as the 441cm? My guess is that it would "learn" better if you put a moderate load on it while breaking in. It may not "learn" as well or as quickly if most cuts are made with no or little presure applied. Just my 2 cents, not claiming to be an expert on the matter.

My understanding is the 576 should be ran under heavy load for the first five minutes or it wouldn't reset the system, and this would cause the system to not run properly. http://www.arboristsite.com/chainsaw/117653.htm

 

[young]

is the 046 still in the mix? or is that back with brad?

7900 vs 441cm vs 576at vs 046. DO IT!

 

[Justsaws]

My understanding is the 576 should be ran under heavy load for the first five minutes or it wouldn't reset the system, and this would cause the system to not run properly. http://www.arboristsite.com/chainsaw/117653.htm

The 576AT has been out for two years? I think I have seen 1. Seen lots of the 57? saws in need of serious repair but I think I have only seen 1 AT. I will ask the company that is running the 57?s if they have any ATs in service, they run lots of Husq and beat the piss out of them.

Never really thought about it but Spike's post makes me think that they are holding up well or the first few crapped out fast and they were placed on the DNBL.