igpoe
Addicted to ArboristSite
Are there any negatives to using avgas in a chainsaw? Old saws? modern saws? Looks like we'll be to that point before long!
Igpoe
Igpoe
avgas negatives?
- Thread starter igpoe
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zogger
Tree Freak
Are there any negatives to using avgas in a chainsaw? Old saws? modern saws? Looks like we'll be to that point before long!
Igpoe
--and what will you do when homerland sekuretee theater cracks down on selling avgas to folks who don't have a handy airyplane nearby at that strip?
Find a no ethanol dealer and go buy some. If it is a trip, what the heck, buy a drum or two and hit it with some fuel stabilizer. Keep it corked up in the coolest shadiest spot you have, and only fill your small cans in the cool of the morning, avoid the "whoosh" of escaping volatile goodness.
Avgas lasts a long time, but it has some negatives to it, real expensive, the octane is wasted, and it still has lead in it. Fun to joke about lead, but it is a cumulative nasty poison.
I burned some cheap delivered 87 octane pump gas that was almost four years old, treated at delivery with Pri-G. Still worked fine, just ran out with a farm bulk tank. Ran the jeep, wheelhorse tractor, push mower and chainsaw. No fuel problems whatsoever, at over twice their claimed duration rate of being stabilized.
AFAIK, they are the only after market stabilizer that claims not only a longer shelf life, but to (somewhat at least) rejuvenate stale gas.
PA Plumber
Addicted to ArboristSite
The negative for me is the lead.
I do run it. So far I've been able to fight off the urge to put my mouth over the muffler and inhale, while the saw is cutting at wot.
I do run it. So far I've been able to fight off the urge to put my mouth over the muffler and inhale, while the saw is cutting at wot.
roger m
ArboristSite Operative
i run av gas in my saws and have had no problems,the av gas around here is 100 octane low-lead,it is cleaner than the 110 leaded race gas i run in my drag car,it sure smells like the drag strip when i am cutting wood though:msp_thumbup:
Poor idle and throttle response the short period I tried it.
I've run av-gas for quite a while now in my 066s and 660s and the only real negative I see is availability. I can get it at my local airport 24 hours a day but a lot of places have done away with that kind of access. If I'm going to be working away from home for any length of time I make sure I stock up. I've been buying gas from that same airport for over twenty years, both for my saws and my plane...they're pretty sure by now that I'm not a terrorist.
The price is usually higher than mo-gas but you know that what you're getting is a decent product and is held to higher standards than pump gas. Av-gas is usually heavily filtered at delivery and the chances of contaminants or water is almost none.
Some of the guys have reported idling problems and the need to retune the carb slightly. I haven't had those kind of issues but I work at constantly changing elevations so I'm usually fiddling with the carb anyway.
The price is usually higher than mo-gas but you know that what you're getting is a decent product and is held to higher standards than pump gas. Av-gas is usually heavily filtered at delivery and the chances of contaminants or water is almost none.
Some of the guys have reported idling problems and the need to retune the carb slightly. I haven't had those kind of issues but I work at constantly changing elevations so I'm usually fiddling with the carb anyway.
Been using it for a few years now and have had only one minor issue.
It has a higher evaporation rate so when in a saw parked on a shelf
for an extended period of time the gas can evaporate and just leave
the oil in the carb making it hard to start. Once started the saw is fine.
Usually just a squirt down the carb and off an runnin.
Lee
It has a higher evaporation rate so when in a saw parked on a shelf
for an extended period of time the gas can evaporate and just leave
the oil in the carb making it hard to start. Once started the saw is fine.
Usually just a squirt down the carb and off an runnin.
Lee
It really pissses off all those corn burners, when I can run 2-3 years old mix, and It don't clog my carb or fry my saws.
I stihl have old homies, with OEM carb/hoses, they stihl run great
Um WHY? They NEVER ran E10
Good luck
P.S. you will get posts saying E10 IS THE CATS AZZZ....uummm yyyuuppp
I stihl have old homies, with OEM carb/hoses, they stihl run great
Um WHY? They NEVER ran E10
Good luck
P.S. you will get posts saying E10 IS THE CATS AZZZ....uummm yyyuuppp
Slamm
Addicted to ArboristSite
About that issue, I was told about this evaporative-ness of the AV gas, but I took it as it just left and didn't varnish the inside of the carb, like auto gas will. I did wonder about the oil staying, behind, but honestly, I have had one saw (084 modded), that I didn't start for something like 2.5 years and it started in about 5 pulls, as if I had just used it the day before. My Kombi 130 always starts super easy and I rarely use the thing. If I'm not going to run an ATV or mower for awhile, I put the AV gas in it and it always starts right up as if I used STabllizer in the crap ethanol gas.
As much as I like the AV gas, I just found out yesterday that its up to $5.15 per gallon at the cheapest airport around here. I will still get 5 gallons for the saws that don't get run much .......... which is just the 084 and also the Kombi 130.
Also, I've had zero running issues with it good power and starts and idles just fine, and I've used several hundred gallons of it.
Sam
roger m
ArboristSite Operative
it's just a shame that we can't go to any gas station and buy decent gas anymore,the quality keeps getting worse and the price keeps going up:frown:,i wonder how the fuel is in other countries like germany or sweden where a lot of these saws are developed and tested:msp_confused:
J.W Younger
ass kissing impaired
The 2 negatives for me are cost and the 30 mile round trip to get it now that i'm not going(retired) to the job that was near the airport. I suppose the lead is worth considering also. My husky doesn't seem to run as well on it either, even when tuned for it. The Stihls and Dolmar run as well when leaned a tad as 93 pump tho and you can't beat the storage life.
The light ends that you'd find in mogas, that vaporize first and start the fire, so to speak, would be a problem in avgas. Once a plane gets up to altitude, the lower absolute pressure would enable them to vaporize, resulting in vapor lock. Which is not good.
The absence of these light ends in avgas would seem to cause the probs @ idle and in responsiveness that Brad mentions.
The absence of these light ends in avgas would seem to cause the probs @ idle and in responsiveness that Brad mentions.
user 64030
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What can we add to regular gas to get the same smell. I love the smell of race fuel exhaust (AV gas as well).
dw
roger m
ArboristSite Operative
that does make sense
cpr
Addicted to ArboristSite
2 years trouble free so far. Not going back to E10. Too many gummy lines and diaphrams.
roger m
ArboristSite Operative
i have a friend that mixes his 50/50 with 93 octane pump gas,i don't know if that would make a difference or not,i always teased him about be stingy with the good gas:smile2:
J.W Younger
ass kissing impaired
nitropropane but you didn,t
hear it from me.
fearofpavement
Trying them all
avgas has a lower vapor pressure that can cause hard starting in cold weather. Not sure if it would be an issue in a chainsaw, probably not since it has a choke but it can be a bear in aircraft. I don't personally use avgas in ope because i can still get pump gas with no ethanol even though it is a 120 mile round trip. (I buy a couple drums at a time) Another issue can be the amount of lead in it can foul plugs but haven't heard any ope users complain of it. It does store for years with no issues if kept sealed up. Keep it off your body too as the lead can absorb through the skin. So when your flippy cap wasn't secured, take some time and wash the fuel off yourself.
By mixing, at a minimum, he's reducing the ethanol/fual ratio, which is a good thing.
Other than the cost, which considering my non-professional usage is irrelevent, I have found no negatives. Saws and trimmers that sit between uses actually start easier for me than when I was using E10.
