How I baby my 2 stoke motors.... 30-1 instead of 50-1
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Iffykid
ArboristSite Operative
Wonder how many people are running liquid cooled 250cc chainsaws?
What specifically would make you think the results would be different with a chainsaw?Wonder how many people are running liquid cooled 250cc chainsaws?
Iffykid
ArboristSite Operative
air cooled vs water cooled for starters.
Think maybe ill remove my old lawnmower engine and build me ah 23 hp direct drive Kohler engine chainsaw. Straight gas all the time. Hire a weight lifter to run it. Ha. Ha. Solved the Mixing problem. Ha. Ha. After reading and reading and, im thinking this makes about as much sense as a LOT OF what I've read so far. Ha. Ha. Hey wait Propane. Those little one pound bottles. Now THAT'S an idea.Wonder how many people are running liquid cooled 250cc chainsaws?
Bmep is much higher for a 250cc bike vs a saw.
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Gone fishing
2,5% syntetic oil will give the engine the lubrication it needs and then some, what more could you ask for?
On a more serious note.
Several years ago I did a test of oils.
With a propane torch and a clean piece of sheet metal out of the wind.
Half a teaspoon of various types of oil were placed on the clean metal then torch was applied.
The 2/cycle burned totally up quickly. Some left a TINY bit or residue almost not visible. With a clean paper towel I was able to collect the residue. Super Tech burned cleanly leaving almost nothing. Regular engine oil 30 wt burned BUT COOKED a while. Heat had to be applied longer and burn time was longer. I will tell you that 30 wt. Auto engine oil should work BUT my guess is, It would build up quickly in the engine. My guess is it will HOLD heat longer due to longer burn times and excessive oily residue. Only in a serious pinch would I use that in my 2 c engine. Frankly, I didn't see enough different between the Walmart super Tech and a more expensive Synthetic. Being mostly retired for MY PERSONAL use I'm fine with Walmart Super Tech. NOW Wally world has a UNIVERSAL 2 cycle oil. In not sure about it. They NOW SAY their Marine 2/c oil is good for Chainsaws. It's designed to prevent moisture and rust. Could it simply be something like Seafoam added to the Universal to qualify the oil for Marine then does that mean it could be UNIVERSAL for ALL types of 2/C engines?
My GUESS IS heat builds up WHEN the oil requires MORE heat to burn off AND residual hot oil remains in the engine ADDING more hot oil with each firing cycle. My knowledge on this subject is limited so all comments spoken kindly are appreciated.
Several years ago I did a test of oils.
With a propane torch and a clean piece of sheet metal out of the wind.
Half a teaspoon of various types of oil were placed on the clean metal then torch was applied.
The 2/cycle burned totally up quickly. Some left a TINY bit or residue almost not visible. With a clean paper towel I was able to collect the residue. Super Tech burned cleanly leaving almost nothing. Regular engine oil 30 wt burned BUT COOKED a while. Heat had to be applied longer and burn time was longer. I will tell you that 30 wt. Auto engine oil should work BUT my guess is, It would build up quickly in the engine. My guess is it will HOLD heat longer due to longer burn times and excessive oily residue. Only in a serious pinch would I use that in my 2 c engine. Frankly, I didn't see enough different between the Walmart super Tech and a more expensive Synthetic. Being mostly retired for MY PERSONAL use I'm fine with Walmart Super Tech. NOW Wally world has a UNIVERSAL 2 cycle oil. In not sure about it. They NOW SAY their Marine 2/c oil is good for Chainsaws. It's designed to prevent moisture and rust. Could it simply be something like Seafoam added to the Universal to qualify the oil for Marine then does that mean it could be UNIVERSAL for ALL types of 2/C engines?
My GUESS IS heat builds up WHEN the oil requires MORE heat to burn off AND residual hot oil remains in the engine ADDING more hot oil with each firing cycle. My knowledge on this subject is limited so all comments spoken kindly are appreciated.
Trapperwv1
New Member
You know you may be on to something except the weight lifter part , build it up with a 36 inch bar and a ripping chain , put it on a stationary mount and make a carriage for logs and you have a right powerful millThink maybe ill remove my old lawnmower engine and build me ah 23 hp direct drive Kohler engine chainsaw. Straight gas all the time. Hire a weight lifter to run it. Ha. Ha. Solved the Mixing problem. Ha. Ha. After reading and reading and, im thinking this makes about as much sense as a LOT OF what I've read so far. Ha. Ha. Hey wait Propane. Those little one pound bottles. Now THAT'S an idea.
DONLAWSON84
ArboristSite Lurker
I have been running scAMSOIL in my 2 strokes for years and always had good luck, it calls to mix 75:1 which sounds crazy but never had an issue up until my 029 started be hard to keep running (this saw has been ran hard, even before i got it). Compression was a little over 100 so i decided for a rebuild, disassembly showed a very clean motor along with the muffler and screen. I don't run my equipment enough for oil testing but my cheap ass is happy with the expensive brand.
camel2019
ArboristSite Guru
I’m going to end up doing something like that except the carriage for the bar/chain will roll on rails like a bandsaw mill. I have a 20hp engine figure I can run around a 50 inch bar with that.
Xmaniac
ArboristSite Member
I run 40/1 ratio with 92 octane. Add a couple ounces of sea foam fuel additive. Unless you rinse out the pre measured bottles of mix with fuel and get every last drop in the container, your not getting a true 50/1 ratio... for this reason I go with 40/1 ratio. Never had a problem with the 8 saws I had ported and decked after 9 year's. They still all have great compression and never fouled a plug.
Good that you are still good strong. I'm 75 and no longer work for people or climb but this little farm and my wood heater keeps me busy. I just finished cutting trails for the ATVs. I keep two so a friend can ride too. Sometimes I right at night as well. Hard work will keep you healthier longer. I'm running all Echo saws (lighter saws for the power ratio) and only 1 sthil. The cs590, 490,352 and a Sthil 029 ( several, mods). Pure Hi octane mixed 40:1 in every 2 stroke. Sometimes 1 ounce of seafoam. I try to start and run everything about every couple of months. Even generators. Just a 5-10 minute run if nothing else. When a carb sounds like it's trying to clog or sags then I add seafoam and keep her running a while longer. Recently an old 4 stroke didn't sound good. I added seafoam and a tad (not much) transmission fluid. Thirty minutes later it was purring. Daily I ran it until all the fuel as gone. Now this is a 4 stroke here not a 2 stroke. The motor runs very smooth and seems to get better gas mileage. Back in the day it was not uncommon to add a tiny bit of transmission oil to gas in a 4 stroke once in a while. I've put old chainsaw fuel ( old not bad) in my Riding mower and it seems to actually be happy with it. I keep 3 or 4 riding mower engines running happily and several generators and various 2 cycle engines. Good luck with your projects. PS. When I work in the woods after dark (not felling but once in a while finishing bucking something) I have a small inverter that plugs into my Lawn tractor. I run lights right off my 12 volt system. These new 120 volt LEDs are bright and don't use a lot of AMPS. See Photo. My motto is, "Make work fun". That John Deere has 22 X 11 -8 inch knobby tires on back and pulls a small trailer all over the farm. Bless you
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Funny thing. I'm 75 and LOVE watching Family Guy and, wait for it, da da, Wrestling. Back in the day I was a wild man. I was able to do a few finger tip push ups a little over a year ago. Some of these young guys can do some things in the ring. Tossing a 200 pound guy like a sack of flour. A couple of my daughters were in a dojo and they were wild lil gals. I've seen my youngest chest kick (a flying mare kick) a nieghborhood boy down. The lady wrestlers remind me of my daughters who are now adults with kids. Mentally, I'm never going to grow old. My Totem is a Cougar. I am tame but I'll never be domesticated. Ha. Ha. For 7 years I tried a normal job. I hated it because my home is in the woods. The sounds, the smells, the plants, and animals, the untamed waters, the wind and rain, all of that is heaven. Sitting on a stump listening to sleet falling on a cover of light snow and watching it get dark makes me feel one with God. Okay. I'm sorry. Kinda got off topic. Blessings.
Iffykid
ArboristSite Operative
Do you rinse out the pre measured bottles to get every last drop? otherwise your not getting a true 40:1 ratio.
For new people that don't know what to do .
125 cc moto & 125 Mac would be close in principle . Bmep is just a theoretic indication of engine efficiency & not an actual indication of internal engine cylinder head pressure waves or pulses as it relates to detonation prevention !
BMEP is a snap shot of state of tune and is in fact a measure of the pressure on the piston through out its cycle. It also very much does correlate with your last two points..
And a modern 125cc moto x bike is way ahead of a 70's era Mac.. a Mac was under 10hp and a KTM 125cc bike motor is 35+HP.
50:1 is what i run anymore and i have not had a problem but my stuff is stock.
Echo oil in my area is cheaper than stihl or husqvarna oil this is after tax on the 2.6 ounce bottle. I only burn 2 gallons of mix in the winter because i cut my wood in the summer.
Stihl orange bottle $2.96
Husqvarna HP $3.11
Echo powerblend gold $2.50
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