wdchuck
Addicted to ArboristSite
Ya got that right, pardner.
American, Siberian, growing all over my place, thought I had Chinese too, then I did more homework and it was not so.
460 bogging in willow.
- Thread starter wdchuck
- Start date
Help Support Arborist Forum:
Ya got that right, pardner.
American, Siberian, growing all over my place, thought I had Chinese too, then I did more homework and it was not so.
PES+
Addicted to ArboristSite
Looking @ the plug
By the look of that plug they are right....you are too lean on top.....which will carry into lean and lack of power as RPMs drop under load. The top RPM unloaded doesn;t mean much....it's what RPM you can carry under a load
Tach it down and experiment as others state
By the look of that plug they are right....you are too lean on top.....which will carry into lean and lack of power as RPMs drop under load. The top RPM unloaded doesn;t mean much....it's what RPM you can carry under a load
Tach it down and experiment as others state
BostonBull
Addicted to ArboristSite
The best way to do it IMO is.....Take the saw out to a BIG log. Get it nice and warm with a few cuts, then strat turning the H screw 1/8 a turn at a time. Stop when you feel you have found the best spot in the adjustment for Power. Every saw is different in this aspect. Some will run great at 13,780, while some will run better at 12,495, and other will rn great right at 13,000 even. tachs will help you get it close and back to factory recommendations but I feel it is these small adjustments with the H scrw that really get you into the best power curve.
PES+
Addicted to ArboristSite
stihl 440
Addicted to ArboristSite
First of all for a 460 14,100 is wayyy too lean. And I think that 12,500 is wayyy too rich. For me personally I would turn it to 13,700 or 13,800, or even 13,600. That would be in it's powerband. Mine is running 13,800, torque is perfect.
By the way have cut a few weeping willows for my friend, one was 6'+ at base. One big tree. I have a stand coming up soon with some willow in it, not weeping. But will see what the others is like.
By the way have cut a few weeping willows for my friend, one was 6'+ at base. One big tree. I have a stand coming up soon with some willow in it, not weeping. But will see what the others is like.
Last edited:
Ditto to what everyone else is saying. 14.1 k rpm's is a little too high. I would definitely retune it. Unless, of course, you want to put a 460 bb kit in it in the near future.
No... water can and will slow a saw down to even a stop......I hate cutting into one and having it piss all over me and stops the chain...
wdchuck
Addicted to ArboristSite
I'll put this sage advice to use in short order, and will report back with results. If it works out, I'll bring some of the willow rounds home in the A.M., and do some test cuts in the same wood for a more accurate assessment.
The landowner had this astonished look on his face when I informed him of the willow's demise, ground cleaned up, and the truck/trailer was loaded to head home, he didn't even know I was there. He said, excitedly," How'd you get done so fast"?. Guess the saw is running too fast.
Thanks for the speedy replies.
The landowner had this astonished look on his face when I informed him of the willow's demise, ground cleaned up, and the truck/trailer was loaded to head home, he didn't even know I was there. He said, excitedly," How'd you get done so fast"?. Guess the saw is running too fast.
Thanks for the speedy replies.
Last edited:
Just my experience cutting Willow. Not sure of type but I think Black. They grow big, 36" or more dbh and 60-80 ft tall are common. I have had no problem with water other than a fresh cut round is HEAVY. Bog in cut? Yes. My fresh out of the dealer MS 310 bogged badly the first tree I cut (it was a huge one). It was also the last one for the season. Fiddled and fiddled with the carb. Cussed the saw of course. Next spring began 'wooding' again and every tank the saw ran better. By the time I had a few more trees through it I had no more bogging.
Harry K
Harry K
wdchuck
Addicted to ArboristSite
Well, I adjusted the H screw some more.
3/4 turn counterclockwise, it was running 15,000rpms
1-1/4.................................................14,100
2-1/8.................................................13,000
THe more I turned it out, the easier it bogged.
It ran fine when I just let it simmer through the cut on its own weight, and kept my input as neutral as possible.
Made three quick videos, but the upload process is not going well, using photobucket.
3/4 turn counterclockwise, it was running 15,000rpms
1-1/4.................................................14,100
2-1/8.................................................13,000
THe more I turned it out, the easier it bogged.
It ran fine when I just let it simmer through the cut on its own weight, and kept my input as neutral as possible.
Made three quick videos, but the upload process is not going well, using photobucket.
PES+
Addicted to ArboristSite
Are your rakers low?....also how many teeth on your drive sprocket?....it sounds like your chainspeed is too high
wdchuck
Addicted to ArboristSite
No, wouldn't think to, not that old or used. Would the compression really get bad so quickly?, and what would cause it.
7 pin/teeth on the drive sprocket. New chain, rakers untouched.
sugarbush
ArboristSite Guru
pull your muffler and take a look at the cyl/piston for scoring or stuck rings.as others have said, check compression.
BostonBull
Addicted to ArboristSite
You may have damaged the top end running it so lean. A 460 shouldnt bog that easy. You should be able to dog it in and pull up pretty good on that with a 7 pin sprocket. Like the others said look through the muffler with the front cover off and see if their is any scoring. If need be post some pics.
Something doesn't sound right. I had no problem ripping through a live weeping willow this summer with my 036 pro. I have an 18" bar and this tree was at least double that the base. It was growing in a drainage ditch. It took about 4 hours and the tree was cut into log length rounds.
wdchuck
Addicted to ArboristSite
Here's some pics of the inniards.
As far as a compression test, I'll have to call the local dealer to find out cost/scheduling/ability.
http://i59.photobucket.com/albums/g292/woodchuck_photos/woodshed 2006/DSC02074.jpg
http://i59.photobucket.com/albums/g292/woodchuck_photos/woodshed 2006/DSC02072.jpg
http://i59.photobucket.com/albums/g292/woodchuck_photos/woodshed 2006/DSC02071.jpg
http://i59.photobucket.com/albums/g292/woodchuck_photos/woodshed 2006/DSC02070.jpg
As far as a compression test, I'll have to call the local dealer to find out cost/scheduling/ability.
http://i59.photobucket.com/albums/g292/woodchuck_photos/woodshed 2006/DSC02074.jpg
http://i59.photobucket.com/albums/g292/woodchuck_photos/woodshed 2006/DSC02072.jpg
http://i59.photobucket.com/albums/g292/woodchuck_photos/woodshed 2006/DSC02071.jpg
http://i59.photobucket.com/albums/g292/woodchuck_photos/woodshed 2006/DSC02070.jpg
wdchuck
Addicted to ArboristSite
Somewhere in the site I posted pics of some 48" siver maple that I was reducing for the splitter, that of course involves cross/rip cuts. I was dogged in and pulling up on the rear handle pretty good, actually started getting a cramp towards the end of 4' rip cut, top-to-bottom, with the 24" bar buried, and no bogging of any sort. This lends some credibility to the wet willow having an impact on this bogging issue. If I had something else around here to cut on, I could verify this, but I'm all caught up for the moment.
I was talking about some times tree have wind crack made in em and the hold in water.... that water will slow and even stop a saw chain......I run a 660 mag and i log and lots of times i run into trees when Idrill em the wwater runs out fast not a pretty site or smell...... I call it tree piss hheheheh
