Testing different timing advances on tree monkeyed 661

[tree monkey]

but it shouldn't pop like that

I think it's running lean. at this point I would try a 066 carb and tune it rich to see if that helps

 

[Moparmyway]

but it shouldn't pop like that

I think it's running lean. at this point I would try a 066 carb and tune it rich to see if that helps

I'm running a 4701 coil, which runs richer than the 4700 coil that's sitting in a draw

I'm going to swap coils to see if it gets better or worse

 

[junkman]

the 25 to 1 is too thick try 40 to 1 see if goes away

 

[tree monkey]

check all wing connections. make sure there tight. check for broken wire

 

[Moparmyway]

check all wing connections. make sure there tight. check for broken wire

I soldered every connection when I first got it, before they came out with the 4701 coil.

 

[Moparmyway]

the 25 to 1 is too thick try 40 to 1 see if goes away

Thanks Brian, that's gotta be the problem !!

I'd try 20:1 to see if its worse before I try 40:1 to see if its better

 

[Mastermind]

Oil thread?

Oh Boy !!!!!

 

[Mastermind]

These MT saws are picky about fuel and oil. I'd run some regular old gas.....and 40:1 to see how it likes that.

 

[junkman]

Listen too this guy ^^^^^^^^^^^^^^^^

 

[junkman]

Thanks Brian, that's gotta be the problem !!

I'd try 20:1 to see if its worse before I try 40:1 to see if its better

25 to 1 is leaner than 40 to 1 is why i suspected it giving the lean pop ,why do you feel you need 25 to 1 ? My milling should be similar to stumping ,my saw has been fine even with a stock choked up muffler at 40 to 1 .

 

[Moparmyway]

You mongrels ...........
OK, I'm on my way out again.

 

[Moparmyway]

25 to 1 is leaner than 40 to 1 is why i suspected it giving the lean pop ,why do you feel you need 25 to 1 ? My milling should be similar to stumping ,my saw has been fine even with a stock choked up muffler at 40 to 1 .

I'm not sure that it's a lean pop.

-The 4701 (richer) coil does it
-The 4700(leaner) coil doesn't do it
-Muffler off and its worse
-Spark is steady, Hardline and Works tachs are steady too
-Fresh VP94 SEF and freash 110ll both do it
-.010 off the key does it less, but its down on power (.020 off key now)
-Doesn't do it under a load, just unloaded or lightly loaded

 

[Mastermind]

I've sure changed a lot of my thinking since we started this site.

What's funny is seeing the whole cycle repeating itself. I'm seeing saws being ported today a whole lot like we did in 2009.

 

[Mastermind]

I'm not sure that it's a lean pop.

-The 4701 (richer) coil does it
-The 4700(leaner) coil doesn't do it
-Muffler off and its worse
-Spark is steady, Hardline and Works tachs are steady too
-Fresh VP94 SEF and freash 110ll both do it
-.010 off the key does it less, but its down on power (.020 off key now)
-Doesn't do it under a load, just unloaded or lightly loaded

If it ain't popping under load.......it ain't advanced too far. That's not the issue.

 

[jmssaws]

If it ain't popping under load.......it ain't advanced too far. That's not the issue.

Ive had it from 010 to 040 and it still pops when not loaded.
I put 404 on it and helped.
It pops the first cut when it's cold and doesn't do it again.
Listen to it lean itself out and get stronger every cut. Pretty Kool I think
Also I believe it's just 4 stroking and nothing more that makes the popping.

 

[Coltont]

These MT saws are picky about fuel and oil. I'd run some regular old gas.....and 40:1 to see how it likes that.

That's exactly what I do in my 661 that redfin ported for me. Been beating it for months everyday and it keeps on keeping on.

 

[mdavlee]

It sounds more like 4 stroke in that video than Kevin's

 

[jmssaws]

It sounds more like 4 stroke in that video than Kevin's

It's tuned down
Only 020 from the key
040 from the key it is worse but it's way stronger and turning more rpm in the wood.

 

[Coltont]

I think John had mine advanced pretty far. Don't know how much though.

 

[jmssaws]

Here it is with 040 off the key and popping but I still say it's 4 stroking