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TOPIC: Re:Chainsaw gurus!
#1016911
Deerkiller (User)
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Chainsaw gurus! 1 Month, 1 Week ago  
So, who here is into chainsaws? I'm getting into it a bit.

Last year, did a bunch of clearing. First with a Stihl 280, then with a 441. Love that 441 with a 20" bar

Those were a friends. Time to buy my own real saw. The Stihl MTronic never worked properly with the 441 so I couldn't get what I really wanted. The 460 seemed like overkill so I went with a 362. Brand new, MTronic. Great saw, probably bigger and more powerful than most people will ever even see in their lifetimes.

However, I found it a little disappointing in power. Remember, I love insane power (almost unusable) in everything. So my quest began again for something bigger. Didn't want to drop $1300 into a new 660 but a 660 is what I really wanted. See one on EBay, guy sends me a video of it cutting, I wait him out for a lower price, it shows up on my doorstep yesterday. Tensioner is broken and chain has been sharpened by a ham fisted gorilla. All good. Get a new tensioner setup ($15) and chain from my local Stihl AgriParts supplier on the way home today. Put it together, feed it 50:1 premium Stihl synthetic blah blah, starts on a couple pulls and runs great.

Went full throttle on a 12" red oak log out back and it made my pants fit funny.

We are talking about a 92cc, 2-stroke, hand held dream maker

This thing is a bit older and has a few carb tuning screws. Any real knowledge from you guys is welcome. Kind of a special area that few people know about, but figured I'd throw it up here in case there are any old saw tuners around here. There's talk of tuning in the cut, 4-stroking, etc on the arborist forums but not a lot of verbiage for the uninformed crowd (why can't everything just be fuel injected with a little computer that can be flashed?)
 
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#1016915
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Re:Chainsaw gurus! 1 Month, 1 Week ago  
Wouldn't call myself a chainsaw guru by any means. I do have wooded acreage, do my share of cutting and somewhat pride myself in dropping a tree where I want it. Haven't used a Stihl in 25 years, not a bad saw, just prefer the Husqvarna.
Shouldn't require tuning very often. Most usually have a idle and mixture screws. You would need to know the top end for your saw (probably around 13k). I would find a good shop and ask them to "tach" it for you. If they don't know what you mean, walk out the door.
 
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#1016916
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Re:Chainsaw gurus! 1 Month, 1 Week ago  
That Stihl 660 is a badass saw! Love those big bores for the bigger oaks. Is there any commercial logging in your area? I'd be talking to them and find out the saw shops they go to. Take yours there and have them give your saw a good lookover and tuneup, try to pick the brain of the guy wrenching on it for any tips. Have you did any searches for chain saw or logging forums? There has got to be something out there.
 
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#1016917
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Re:Chainsaw gurus! 1 Month, 1 Week ago  
Hard to describe, in words, how to fine tune a two stroke for best performance without going too lean and burning it up. A tad rich is the key.

Go to youtube and do some searches for tuning chain saws. Doesn't have to be a Stihl. All two stroke carbs tune the same, provided they did include both high, and low, adjustable needles.

Since tuning them has become a lost art, many have fixed main jets to avoid folks missing the 'sweet spot' tune and frying the engine.
 
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#1016919
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Re:Chainsaw gurus! 1 Month, 1 Week ago  
Thanks for the replies

Have found a couple forums and have learned a few things. Problem is, you can't really learn how to tune from reading them (other than a basic idea). So, that's where I am right now.

The saw shop suggestion is on my to do list for sure. The tuner guy only works a couple days a week so I'll wait till he's in and go talk to him. I know they can do basic tuning but not sure how in depth they get. I'd like to put a dual port muffler on this thing and tune it properly to get more power out of it. That definitely requires a proper tune though.

The YouTube suggestion is a great idea. I learn pretty well that way (visually with sound). I'll definitely be doing some youtubing on the subject in the next couple days
 
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#1016920
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Re:Chainsaw gurus! 1 Month, 1 Week ago  
They're pretty easy to tune once you hear the changes made with the needles.

Basically, one turn out on each from when seated and go from there. It's getting the highest RPM with mixture screws, @ idle and WOT, then backing them out until the revs start to drop, I.E. going a little rich. Takes a few rounds going back and forth, till they are all synched.

Just can't spend too long screaming them leaned out. Gotta be quick with the screwdriver. They get their lubrication in the fuel. Not a fan of 50:1 to 100:1 mix ratios. EPA bullshit. (All my 2 stroke tools get 25-30 to 1 oil mix. A little more smoky, but they get plenty of lubrication. Some are over 40 years old and run like new.)

Once you watch someone that knows what they're doing, you'll catch on.
 
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Last Edit: 2017/07/12 08:41 By BikerRon.
 


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#1017086
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Re:Chainsaw gurus! 1 Month, 1 Week ago  
Ran chainsaws for most of my working life, I have run both Stihl and Huskies, my experience with these as been, from a totally strip down carb and put back together, turn high and low speed screws all the way in, back out high speed 1 turn, back out low speed 1.25 turns, strat saw let idle to warm, rev it a couple times, don' t hold WO! Just pin it a few times to see how it responds to throtle. if it plurps from the start turn low speed in a little at a time untill it has a quick reponse, when it respones quick to throtle, give it about a 2-3 second rev, if it screams adjust high speed out just a little at a time, it should sputter just a little but hold a rev at full throtle. You may have to go back and forth a few times to get the balance right, if the carb is working real good, 98% of your adjustment can be done on the low speed jet alone. This as been my procedure for years, never burnt up a chainsaw engine once......but have worn out several!! .......Hope this helps!!


Perry
 
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Last Edit: 2017/07/14 21:11 By pinks.
 
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#1017096
Deerkiller (User)
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Re:Chainsaw gurus! 1 Month, 1 Week ago  
Thanks

Starting to make more sense. So, turning the needles out (CCW) richen things up correct?

Going out today to give em a workout
 
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#1017098
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Re:Chainsaw gurus! 1 Month, 1 Week ago  
Deerkiller wrote:
Thanks

Starting to make more sense. So, turning the needles out (CCW) richen things up correct?

Going out today to give em a workout


I've been collecting free seasoned oak last week from Craigslist. I've split about 3 full cords this week and only had to drive a couple miles to pick it up. My cousin loaned me his 26 ton vertical splitter and I Didn't have to cut any of it. Going to get some Maple on Sunday. I got a wood insert coming in next week to install in the living room, hopefully it will cut my heat bill down to almost nothing this year.
 
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Last Edit: 2017/07/15 06:26 By davej.
 
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#1017099
Deerkiller (User)
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Re:Chainsaw gurus! 1 Month, 1 Week ago  
davej wrote:
Deerkiller wrote:
Thanks

Starting to make more sense. So, turning the needles out (CCW) richen things up correct?

Going out today to give em a workout


I've been collecting free seasoned oak last week from Craigslist. I've split about 3 full cords this week and only had to drive a couple miles to pick it up. My cousin loaned me his 26 ton vertical splitter and I Didn't have to cut any of it. Going to get some Maple on Sunday. I got a wood insert coming in next week to install in the living room, hopefully it will cut my heat bill down to almost nothing this year.


Sounds like a sweet deal. I bought a used splitter a couple months ago. Built a lean-to for wood storage on the back of the garage too. I've got some oak getting ready for the winter after next in there

What insert did you get?
 
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