Tuning With A Limited Coil

[Vintage Engine Repairs]

I hope it helps.

 

[president]

I hope it helps.

greaty explanation Tom!

 

[Vintage Engine Repairs]

Thanks mate

 

[davidwyby]

Here is a good earful of what Tom explained sounds like.

One of these days I’ll figure out an unlimited coil for my 6100

 

[Vintage Engine Repairs]

Damn that runs sweet, undoubtedly ported. Lovely machine! I always go a touch richer that Brad has shown here, but that’s because it makes me feel more comfortable, not because the saw necessarily needs it!

 

[aeolian]

After the year 2001 all Stihl 2-stroke
engines do have a rev limiting coil.
I was told so from a Stihl technician.

 

[davidwyby]

I like it so it wavers with just the saw weight...but chain aggressiveness will mess with you there too.

 

[Vintage Engine Repairs]

After the year 2001 all Stihl 2-stroke
engines do have a rev limiting coil.
I was told so from a Stihl technician.

That’s good to know!

 

[huskihl]

After the year 2001 all Stihl 2-stroke
engines do have a rev limiting coil.
I was told so from a Stihl technician.

Ms440, 460, 361, 660 are all unlimited

 

[Powerstroke Cowboy]

Ms440, 460, 361, 660 are all unlimited

Yea, and then they done blowed it with the 880.

 

[SCHallenger]

After the year 2001 all Stihl 2-stroke
engines do have a rev limiting coil.
I was told so from a Stihl technician.

I have a Stihl 261 pre-Mtronic (early 2011 model). The coil in that model is not limited.

 

[Vintage Engine Repairs]

I have a Stihl 261 pre-Mtronic (early 2011 model). The coil in that model is not limited.

That’s surprising! I would have thought it does have.

 

[SCHallenger]

That’s surprising! I would have thought it does have.

When the saw was new & stock, it tached at 14,300 & was way too lean! After I removed the H limiter & opened the muff, it ran very well at 13,300-13,500. When well broken in, it was best at 13,500-13,800. I then had it ported by Brad Snelling. The optimum RPM then became 14,500! It will run 15,000 safely for race cutting. The tach has never "bounced" when it was used for checking where we were at.
Earlier on (late 2010) when Brad first started porting the 261, he thought that they were limited, but he felt that it did not occur until the RPM was somewhere north of 16,000!!