It's here! The M-Tronic MS261C is finally here.

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MindFork

MindFork

ArboristSite Operative
Joined
Aug 8, 2013
Messages
182
Location
WA State
That's it. It's a long read, but it details the step by step process of how I came to mod the 261 like I do to this day.
That was a pretty messed up thread. I just skipped everyone else's posts except yours. My favorite part was the before and after pictures of the strato to non-strato ports. The little "face" in the ports went from :) to :msp_scared:

Just out of curiosity...What was the "fuel economy" impact of the mods?
 
blsnelling
Joined
Nov 8, 2006
Messages
53,727
Location
Franklin, OH
Are you gonna de-strato the m-tronic brad?

I'd frankly like to see how it (1.) runs before mod's (2.) run's after porting w'out de-strato-ing first.

IMHO, it's not worth your money to port, if not gutting the strato. If you followed my original 261 build thread, the saw was a disappointment with mods, until I gutted the strato. Yes, gains were made, but not to my liking. I'll tighten the squish, mod the muffler, and advance the ignition on a 261 for a reasonable price, but I won't port one unless it goes all the way.

This 261C will be tested:
1. Stock
2. Muffler modded
3. Squish tightened
4. Timing advanced (This saw might not like the timing advanced)
5. Full porting, w/strato gutted.
 
blsnelling
Joined
Nov 8, 2006
Messages
53,727
Location
Franklin, OH
Real question for now is how does the 261c stock run compared to stock 261?

Fortunately, a new regular MS261 is supposed to be heading my way tomorrow. All of my testing will be in the same cant, so will have a real good idea. All testing won't be on the same day, but, will be in the same wood, with the same B&C.
 
Tnshaker

Tnshaker

ArboristSite Guru
Joined
May 30, 2013
Messages
631
Location
tennessee
Now we are talking..something to hold us over till u get that baby ported:rock:. I am not sure the m tronic will fuel it enough to run with ur regular ported 261. I ran one of those and that thing was bad news:rock: for such a small saw. It cut through 18" would like a big saw:rock:
 
LowVolt
Joined
Jul 19, 2011
Messages
3,445
Location
Cincinnati, Ohio
I tested setup #4 when I built LowVolt's saw. IIRC, it was good for 20% over stock. It makes for a nice running saw. The squish is really loose on these. Hopefully Rory will come along and correct my figure above.

What am I, your friggin secretary? This is your video.........

[video=youtube;z5DVUptVHCY]http://www.youtube.com/watch?v=z5DVUptVHCY&feature=player_embedded[/video]
 
CR500

CR500

Diesel, Snowmobile, & Chainsaw Technician
Joined
Aug 21, 2010
Messages
678
Location
East Otto Ny
IMHO, it's not worth your money to port, if not gutting the strato. If you followed my original 261 build thread, the saw was a disappointment with mods, until I gutted the strato. Yes, gains were made, but not to my liking. I'll tighten the squish, mod the muffler, and advance the ignition on a 261 for a reasonable price, but I won't port one unless it goes all the way.

This 261C will be tested:
1. Stock
2. Muffler modded
3. Squish tightened
4. Timing advanced (This saw might not like the timing advanced)
5. Full porting, w/strato gutted.

Another hit or miss with timing huh lol? I tried my timing advance on my 441 you re-did and you were right it runs better in the stock posistion lol
 

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