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Author Topic: AT fuel mix  (Read 2601 times)

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Offline HolmenTree

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Re: AT fuel mix
« Reply #40 on: October 09, 2018, 10:36:06 PM »
So are we saying if we mix 10:1  compared to 50:1 the L and H speed screws need to be turned out to richen for the leaner gas to air intake?

I see it differently as I see the mix oil  mixed with gasoline being fuel to burn too. With a carb set for 50:1 with 10:1 mix lots of smoke is coming out of the exhaust and a leaner setting on the L H would be needed to get the rpm and  power up through a cleaner burn.
Making a living with a saw since age 16.

Offline HolmenTree

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Re: AT fuel mix
« Reply #41 on: October 09, 2018, 10:54:12 PM »
I see no potential lean seizure condition with extra oil when there is a stronger barrier of oil between the metal friction surfaces .
Reason my 40 h.p. 125 cc dirt bike engine runs 24:1 and with its one thin piston ring it needs that extra oil for a good ring to cylinder seal 
Making a living with a saw since age 16.

Offline Al_Smith

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Re: AT fuel mix
« Reply #42 on: October 10, 2018, 05:23:23 AM »
 8) ---see why I love the oil wars --- 8) 

Offline thecfarm

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Re: AT fuel mix
« Reply #43 on: October 10, 2018, 05:53:20 AM »
 ;D  ;D  ;D
Model 6020-20hp Manual Thomas bandsaw,TC40A 4wd 40 hp New Holland tractor, 450 Norse Winch, Heatmor 400 OWB,YCC 1978-79

Offline Al_Smith

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Re: AT fuel mix
« Reply #44 on: October 10, 2018, 07:59:11 AM »
I suppose , ornery as I am ,
 I could get them on a kick of gasoline or maybe even racing fuel to use in  a standard old work saw .I won't though .Best to let that sleeping dog lie . :D
Then again it could turn into an interesting conversation comparing Ohio sour black crude oil to Venezuela light crude oil for feed stock .I'll have to think about it . 8) 

Offline Mad Professor

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Re: AT fuel mix
« Reply #45 on: October 13, 2018, 08:05:46 PM »
No E10, stirred not shaken.

Offline Gearbox

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Re: AT fuel mix
« Reply #46 on: October 14, 2018, 09:04:40 PM »
I run Amsoil Saber that is 100 to1 oil . I mix that at 50 to 60 to 1 My saw guy has had them down for other reasons and said they look great inside . The big plus is that when I start the saw the bugs all leave . I have a lot of hours on a 475 Poulan on my processer and never even fouled a plug . 
A bunch of chainsaws a BT6870 processer , TC 5 International track skidder and not near enough time

Offline Al_Smith

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Re: AT fuel mix
« Reply #47 on: October 15, 2018, 07:00:16 AM »
The only oil fouled plugs I've ever seen were caused by worn out impulse type oil pumps on McCullochs and one Lombard .This allowed bar lube to be sucked into the crank case and at times put a hydra lock on the cylinder in extreme cases .
More times than not in my experience  carbon fouled plugs will have dry black residue not oily .The cause is running too rich of the air to fuel ratio not the oil ratio .Which is not saying before somebody chimes in that it's okay too use some  outlandish ratio like 4 to 1 . 

Offline Southside logger

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Re: AT fuel mix
« Reply #48 on: October 15, 2018, 07:44:57 AM »
I think it's perfectly OK to run 4:1 gas to oil in a saw.  :D  Just be sure to use #6 oil as the mix.  ;D 
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Offline Al_Smith

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Re: AT fuel mix
« Reply #49 on: October 15, 2018, 09:16:49 AM »
Well I once used 140 WT gear oil in a worn out old Oliver crawler .It still blew blue smoke though lots of it .

Offline thedoublejranch

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Re: AT fuel mix
« Reply #50 on: October 19, 2018, 11:56:26 PM »
50:1 as long as I am using high quality oil rated for 50:1. What is that, about 2.6oz to a gallon.
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