Stihl MS441CRM-Tronic Ported Work Saw Review

[Andyshine77]

I dint know if people realize this but from cold and 441C starts you dint have to flick control lever up just blip throttle and control lever goes up to run.:msp_smile:

Correct, and I don't think you can flood them, that's a big plus for non AS members.

 

[Slamm]

From a WORK saw point of view these ported M-Tronic or even a stock one have a lot going for them compared to the old school saws.
Heaps of HP
Heaps of torque
Standard RPM
Standard compression (no extra stress on bottom ends)
Easy starting
Good fuel mileage
No tune
Smooth ride
Better throttle response
Better filter system
The Wrap model (i think $40 more) has
Twin bumper spikes
Roller chain catcher
High out put oiler
Stiffer AV springs

How can ya go wrong even a stock one with a muff modd to easy.
Its heaver big deal in ported form who cares its like using a stock 80 or 90 cc saw anyway and with all the above advantages im sold.

Bring on the 661 M-Tronics.

Quit fooling yourself, they won't believe you, LOL.

I have 14 videos trying to upload. I cut 20ish trees today with the Mtronics 441, and I photo'd or video'd everyone. It was a very nice saw. I'm not getting the fuel efficiency with the 441 Mtronics, that I am with my regular Sawzilla 441 in this timber. I put 6 tanks through it between firewood and felling trees this evening for a few hours. If all goes good, I'll have a morning to night day of felling with it tomorrow and really get some gas through it.

I didn't know about the blipping the throttle to get the lever to pop up, I was just flipping the lever, which after all doesn't put those nasty undo RPM's on it, LOL, JOKE.

Later,

Sam

 

[Terry Syd]

Sam, that's interesting that the M-tronic carb isn't getting the fuel economy as a stock carb. It may also be indicative of how a stock carb goes lean as the revs drop. The M-tronic keeps the fuel ratio correct and helps retain the power even as the engine drops further away from the optimum design RPM.

The stock carb getting better fuel economy seems to be consistent with stock carbs having too high of pop-off pressure. The higher pop-off pressure limits the usuable range of the carb and forces the factory/operator to tune the carb for the optimum design rpm. The leaning condition may help emissions as it moves away from the design RPM, but the usable power range of the engine is sacrificed.

When I first started reading on this forum, I was surprised at the tuning process of getting the engine to 4-stroke out of the cut, and then clean up in the cut. I have never tuned any other engine (motorcycle, car, etc) in such a manner. I couldn't imagine tuning a motorcycle so that it started blubbering once it got past peak horsepower. It's not as if the diaphragm carb can't be tuned for a broader range, the kart racers have shown that they can tune these carbs for karts with only one gear - that is, they use a far broader use of the powerband than a saw does.

I'm hoping the new interest in electronic carburetors (and what they can do) will stimulate some interest in proper fuel metering and lead to further experimentation with the old style of carbs.

 

[Slamm]

Terry,

I'll put a lot of gas through this saw in the next few days this week and see how it, goes, but thats just what I found in a couple of hours, this evening, in similar timber, maybe it was a little bigger on average, but fuel mileage was down, cut times were very good, and the low end grunt and just ease and please to use were above par of any saw I've run. I was playing tonight, tomorrow, I'm going to put the camera down and really shoot for some hourly tree averages and see what it and I can do.

I can and will pull out the modded 660 and double check my fuel mileage, but I'll be eating some crow if it can't at least beat the 660 in fuel mileage, I don't think its that bad, but it sure wasn't like one of my regular carbed (modded) 441's, that I do know with all confidence. That said, all of my other 441's got horrible mileage and power for the first 15-20 tanks, so I just want to get gas through this one and then start whining about it and seeing whats wrong or different, LOL.

Sam

 

[Stihlman441]

Sam
Im a little surprised with the fuel mileage thing,i thought it would be the other way around see how it is after some more fuel through it and it brakes in some more.
With that dual port muff from your older 441 would you say that the combined outlet size is twice that of the stock 441C ?.

 

[MCW]

Unfortunately all the whizz bang gizmos still won't get the 441's balancing like a Husky
By the way my 241C M-Tronic arrived today. I'm sold on this electronic wizardy. First pull starts when cold so far.

 

[Rudolf73]

[snip]
By the way my 241C M-Tronic arrived today. I'm sold on this electronic wizardy. First pull starts when cold so far.

Cool beans

 

[MCW]

Cool beans

No...


...cool bananas

 

[blsnelling]

Stihlman, please don't take this wrong, but has anyone else noticed how much stronger Porsches 441 is, yet they're from the same builder. Porsches looks to holds a lot more RMPs in the wood. There's something significantly different between those two saws.

 

[MCW]

Terry,

I'll put a lot of gas through this saw in the next few days this week and see how it, goes, but thats just what I found in a couple of hours, this evening, in similar timber, maybe it was a little bigger on average, but fuel mileage was down, cut times were very good, and the low end grunt and just ease and please to use were above par of any saw I've run. I was playing tonight, tomorrow, I'm going to put the camera down and really shoot for some hourly tree averages and see what it and I can do.

I can and will pull out the modded 660 and double check my fuel mileage, but I'll be eating some crow if it can't at least beat the 660 in fuel mileage, I don't think its that bad, but it sure wasn't like one of my regular carbed (modded) 441's, that I do know with all confidence. That said, all of my other 441's got horrible mileage and power for the first 15-20 tanks, so I just want to get gas through this one and then start whining about it and seeing whats wrong or different, LOL.

Sam

Hi Sam.
If that 441 doesn't beat a 660 in fuel economy then we have a problem. The 660's, without a doubt, have some of the worst fuel economy I have ever seen, stock OR modified...
When I recently did part 2 of a forestry course two brand new 660's were being run by the other two trainees. My modded 7900 and 390XP absolutely pumped those saws in every performance aspect but when both 660's were due to be filled I still had 1/2 a tank left in either the Dolmar or Husky. Even the instructor commented on it as he expected me to be filling up earlier than the 660's. So did I to be honest

 

[MCW]

Stihlman, please don't take this wrong, but has anyone else noticed how much stronger Porsches 441 is, yet they're from the same builder. Porsches looks to holds a lot more RMPs in the wood. There's something significantly torrent between those two saws.

It could simply be the Pine versus Stringybark aspect Brad? I could be wrong but I think the builder in question claimed that he'd made a few gains on Andrew's saw compared to John's.

 

[deye223]

congrats on the ms241 MCW

 

[blsnelling]

Hmmm, sure doesn't appear that way. I've watched all the vids and Johns always looks and sounds way stronger. Again, these comments are not meant to knock anyones saw our anyones work. I would just like to know what's different.

 

[Slamm]

Hi Sam.
If that 441 doesn't beat a 660 in fuel economy then we have a problem. The 660's, without a doubt, have some of the worst fuel economy I have ever seen, stock OR modified...
When I recently did part 2 of a forestry course two brand new 660's were being run by the other two trainees. My modded 7900 and 390XP absolutely pumped those saws in every performance aspect but when both 660's were due to be filled I still had 1/2 a tank left in either the Dolmar or Husky. Even the instructor commented on it as he expected me to be filling up earlier than the 660's. So did I to be honest

Matt, I meant that figuretively about the 660. I'm headed out to cut today and have a pretty good idea of proper fuel economy for this size timber so I'm going to keep my eye on it. I agree, that we will have a problem if it truly is that bad. Like I said before every other 441, I've had, was not the saw it should be for about 15-20 tanks.

We'll see,

Sam

 

[Slamm]

It could simply be the Pine versus Stringybark aspect Brad? I could be wrong but I think the builder in question claimed that he'd made a few gains on Andrew's saw compared to John's.

He did make two slight changes to Andrew's saw over John's saw, they were good common sense changes. It will be awhile before a third or more are built for comparison. The difference in the videos has been noticed by John and I, obviously Brad sees it. John UPS'd me pieces of that oak he is cutting with the 28" bar, when it is bounce off the rev limiter and it is truly rock hard, from all appearances I don't think a well modded 90cc saw could produce a video like that one, if you knew how hard that wood truly is and then watch the video.

John and I discussed some possibilities to the reasons for this and I will hopefully get a feel for it this week.

Sam

 

[MacLaren]

Honestly Sam, Ive watched the vids and what not. I dont think theres a snowballs chance in it beating one of Terry's ported XPW's. From what Ive saw, sawzilla is getting about 29% gain. Thats excellent. But thats no where near what Terry's ported XPW's will run. I didnt wanna say anything, but when ya mentioned a well ported 90cc saw not keeping up, well........I wanna see any ported 441R go up against a good ported XPW,2171,460,etc.....THEN we shall what kind of saw sawzilla can make IMHO.......and not to mention Sam, but as far as well ported 90cc saws I have a WELL ported 660 that beat a WELL ported 2171 by 28% thru rock hard oak. You can see the vids for yourself. I believe ya when ya say they are excellent runners, but theres a limit to everything.

 

[blsnelling]

I believe Johns saw would be right there with Terrys XPW. I also say that that a really strong 70cc saw should not be out cut by a 660 like that. In that size wood the 70cc saw has plenty of HP and more RPMs then the 660. Just my honest opinion there.

 

[MacLaren]

I believe Johns saw would be right there with Terrys XPW. I also say that that a really strong 70cc saw should not be out cut by a 660 like that. In that size wood the 70cc saw has plenty of HP and more RPMs then the 660. Just my honest opinion there.

I understand Brad, but this isnt your average ported 660. I mean no offense by that either. I think we can agree to disagree.

 

[blsnelling]

My comments would apply to any woods ported 90cc class saw. JMHO. Sounds like more good GTG fun

 

[porsche965]

It could simply be the Pine versus Stringybark aspect Brad? I could be wrong but I think the builder in question claimed that he'd made a few gains on Andrew's saw compared to John's.

For what it's worth the wood in both videos is what I call Red Oak, but whatever the variety it is oak. Hope this helps the thoughts on this topic. :msp_smile: