TreeMonkey Red Light 066 Build

[dall]

Now, I ran this saw for the first time this morning and it has SO MUCH TORQUE! It's quite amazing actually. Now one thing I notice, that with only .020 off the key that I'm getting some 'popcorn' at higher RPM, which goes away when the revs come down in the cut. The red light works as it should and comes on at 12,000 and the limiter cuts the revs at 13,500, as it should, but my question to all those 066 buffs out there, is does the coil have a substantial built-in advance? Apart from lots of compression, I have had no difficulty starting it and it hasn't 'bit' me yet. @Definitive Dave you have an excellent thread that you started here: https://opeforum.com/threads/064-066-ms650-ms660-info-thread.696/ maybe you can help me? Is .020 too much advance?

my 066 is unlimited and will bite you if you are not committed when pulling

 

[BuckthornBonnie]

You may like the stock timing on these saws. All of my 1122s are “stock” timing but have a variety of coil combos. My favorite is the 064 1201 flywheel with an 046 ignition.
Yep, they all can bite ya.

Nice build thread by the way.

 

[ManiacalMark]

What’s the compression?

 

[markds2]

What’s the compression?

Not 1/2 a tank full through it yet

 

[Deets066]

You sure it’s not the limited coil you are hearing?

 

[markds2]

You sure it’s not the limited coil you are hearing?

Nope, I'm absolutely sure, it's only noticeable when in the cut and it goes away when I really bring the revs down. Sort of a popping sound, and it was way worse when I richened the saw up

 

[ManiacalMark]

Try a stock woodruff key and see if it changes at stock timing.

 

[Kiwioilboiler]

Not 1/2 a tank full through it yet

Why didn't you put more in?

 

[markds2]

Why didn't you put more in?

Ummm.....cause I was in a rush and forgot my fuel can

 

[Kiwioilboiler]

and forgot my fuel can

Its the flash red thing you bought the other day with over-fill protection on each end. You're welcome.

 

[redlight066]

Stock timing on mine. Really likes a good load at this tune. You can hear it pop a couple of times on the first cut

 

[redlight066]

Same tune with a good load demonstrating the red light feature. I believe it had an 8 pin sprocket on it that day.

 

[markds2]

Stock timing on mine. Really likes a good load at this tune. You can hear it pop a couple of times on the first cut

Thanks for sending that through. Mine pops way more than that with .020 off the key, they must have an aggressive advance curve on the coil?

 

[BonScott46]

Thanks for sending that through. Mine pops way more than that with .020 off the key, they must have an aggressive advance curve on the coil?

If it was that aggressive wouldn't it be biting?

 

[markds2]

If it was that aggressive wouldn't it be biting?

Not necessarily, some coils retard at low revs for easy starting and advance at high revs for power. Thats why they call it an advance 'curve' - its not linear across the rev range. The following tech bulletin for an 084 is one example of the retard for easy starting:

 

[BonScott46]

Not necessarily, some coils retard at low revs for easy starting and advance at high revs for power. Thats why they call it an advance 'curve' - its not linear across the rev range. The following tech bulletin for an 084 is one example of the retard for easy starting:
View attachment 263701

I don't think it could have been explained more succinctly.

 

[markds2]

Same tune with a good load demonstrating the red light feature. I believe it had an 8 pin sprocket on it that day.

Nice saw! What cylinder is on that? Have you timed it?

 

[Hinerman]

I have the same problem with my TM 064. I'd like to get somebody smarter than me to run it and give me their opinion.

 

[markds2]

I have the same problem with my TM 064. I'd like to get somebody smarter than me to run it and give me their opinion.

You mean it's making popcorn like it has too much timing advance?

 

[rogue60]

You could just turn the key around back to stock timing and re test? that's what I'd do anyway.
And hurry up we need vids of this beast cutting