460 bogging in willow.

[wdchuck]

Well, the 460 now has the DP muffler on it, taches at 14,100 and is wearing full comp chisel on a 24" ES bar. I check my air filter every fill up and clean if neccesary.

The saw would bog with any pressure and did it on its own when a fresh chain was put on, clean cuts, no pinching. The 25" off shoot was the last piece of this living tree that landowner wanted down. The rest of the work here will be oak, if willow slows the saw up what will the oak do.

WHAT am I doing wrong? :bang:

 

[blis]

Your brand is wrong, nothing else...


:monkey: :monkey:



What gas are you using and with what mix? has it been broken in?

 

[PES+]

Willow is like that

Willow is like that......it always holds water year round and is one of the worst sawing woods I ever cut......I suggest semi chisel in Willow...particularly weeping willow which is the worst........stinks too

I'll bet you have a better time with the oak

 

[BostonBull]

Your brand is wrong, nothing else...


:monkey: :monkey:



What gas are you using and with what mix? has it been broken in?

If his mix was wrong he most likely woulod have already blown up the saw. Not sure what you menat by the breaking in comment. There has been many discussions on here about breaking in a saw, I feel like many others do just use it and try not WOT when out of the wood.

Sounds like your just in some tough wood. Is it a stump cut, root flare? Try turning the H screw 1/8 turn richer.

 

[ray benson]

Did you try to readjust the carb? Might be running lean which would make the saw perform that way.

 

[blis]

If his mix was wrong he most likely woulod have already blown up the saw. Not sure what you menat by the breaking in comment. There has been many discussions on here about breaking in a saw, I feel like many others do just use it and try not WOT when out of the wood.

Sounds like your just in some tough wood. Is it a stump cut, root flare? Try turning the H screw 1/8 turn richer.

that break-in comment was incase he just tuned to saw straight to max on first tankfull and tried to cut some too big wood...

 

[Woodie]

Willow is like that......it always holds water year round and is one of the worst sawing woods I ever cut......I suggest semi chisel in Willow...particularly weeping willow which is the worst........stinks too

I've never cut any willow, so don't interpret this as me doubting you, but I was intrigued by your answer...wouldn't the water, with its extra lubrication, help in the cut? Or would the water add extra weight to the chips, therefore making them slower/tougher to clear?

Again, no experience with it, so not questioning your judgement, just curious.

 

[sugarbush]

tac at 13,500

 

[Cut4fun]

I dont think it is the wood type at fault here. I used my Poulan 3750 60cc with 22" and windsor full comp full chisel chain buried in over 50" of weeping willow tree stump and 16"-28" main trunks and limbs in weeping willow without any bogging what so ever.

 

[Ed*L]

The water/sap mixture in the culprit, it adds a ton of friction to the chain while it's trying to cut. I've had the same thing with live Siberian Elm (aka- Chineese Elm). A modern saw that depends on chain speed rather than torque just can't overcome the resistance.

Ed

 

[Justsaws]

Did you try to readjust the carb? Might be running lean which would make the saw perform that way.

Ditto. Good idea to run it in the wood and then set it for the best power. Sounds like it is to lean.

 

[wdchuck]

50:1, stihl oil, 92octane gas, saw has plenty of hours on it, more than one year old.

The carb H screw was adjusted for the new Stihl DP muffler, removed the limiter, used the tach to adjust the rpms, then installed the plastic limiter.

I know willow, along with other trees can draw sand up with the water from the ground, thereby causing faster dulling of the cutters, but that isn't the issue.

A 460 should be able to cut like a hot knife in such soft wood, especially with a fresh chain.

 

[ol'homey]

What's your compression psi? Lower compression= lower HP. Might want to post a pic of your spark plug while you have it out, so we can see if you're too lean.

 

[romeo]

14.1 K (even with a modded muffler) sounds too high unless you have changed your port timing. I would still run it at 12.5 K.

 

[ray benson]

Read Drew and Ben's posts in this thread. It pertains to a 460 and using the tach in general. http://www.arboristsite.com/showthread.php?t=10422&highlight=carb+tach

 

[ciscoguy01]

44/46

I'll give ya my .02. Running at over 14k can't be good. I had my 44 with muffler mod running at that speed and was very disappointed with it's torque. I turned her down to just over 13k, like 13,200 I believe is what they set'er at and I'm very happy. I think 14,1 is high for a 46, I'd kick'er back a little and see what happens. If you've got a tach you can set it to the best overall range for what you'd like to cut. At 14,1 that baby must really scream eh??? On the same hand, as soon as you touch it to some bigger wood I'm sure it dogs like mine did also... Let us know eh?

 

[1953greg]

wdchuck

willow can pinch the bar from swelling behind the bar but certainly wont bog the saw down beginning the cut.

definitely a problem w/ the saw. probably tuning but i still cant imagine a 460 bogging like that in any wood w/ a mixture problem.

i suspect something more sinister.

 

[BostonBull]

The water/sap mixture in the culprit, it adds a ton of friction to the chain while it's trying to cut. I've had the same thing with live Siberian Elm (aka- Chineese Elm). A modern saw that depends on chain speed rather than torque just can't overcome the resistance.

Ed

Off topic but cant have stuff like this floating around to confuse other members.......

Chinese and Siberian are two different species.
http://www.cnr.vt.edu/DENDRO/DENDROLOGY/syllabus/factsheet.cfm?ID=90
http://www.cnr.vt.edu/DENDRO/DENDROLOGY/syllabus/factsheet.cfm?ID=134

 

[wdchuck]

Here's the original sparkplug. Seems odd that its different colors on each side, the piston top was covered in carbon also.

 

[blsnelling]

To me, it only makes since to start with the carb tuned per the manual at 13,500 and go from there. Until then, we haven't established a baseline.