Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Husqvarna => Topic started by: Jason K on May 24, 2015, 07:41:50 pm

Title: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: Jason K on May 24, 2015, 07:41:50 pm
I normally fun 40 to 1 with uncut fuel as not blended. 91 oct is the gas I can find. Plus I need to run the same fuel in my 550xp. Would I be ok with what I have already 40to1 91oct. Would that be ok or all my saws. Or could I run aviation fuel 100 oct with low low lead.. The only thing is my 550xp . Manual says no lead. So what should I do


Please let me know..

Thanks
Jason
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: mdavlee . on May 24, 2015, 10:27:03 pm
The 100 LL will work in them all. 40:1 is fine.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: wild262 on May 25, 2015, 06:03:35 am
               Your 40:1 is fine, as long as your saws are tuned to it. I have a 288 and a early 262.  Love them both.  As for the   550, if it is still under warrentee, than run what they recomend till it runs out, just to be safe.  The best combination that works for me is; Non-eythnol 89-92 oct. with Stihl Ultra oil mix.   This has been "good" up to 6-months or more for me.  Any longer than that it goes in the tractor.    If you use eythnol laced gas, figure 1-2 months at most with the Ultra in it.  Just make sure you tune the carb. to the mix ratio. Enjoy  :)
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: Jason K on May 25, 2015, 01:52:29 pm
100LL it is then.. Thanks guys.


Thanks
Jason
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: alsled on May 26, 2015, 07:23:36 am
My guess would be 100ll will be ultra safe fuel, along with making less power then 91 octane. There is not enough compression and timing in a stock engine to use the advantages of high octane.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: HolmenTree on May 27, 2015, 10:58:04 pm
Very true alsled
Those 91 octane canned fuel mixs Stihl and Husky sell prove how well a stock saw can run.
Also not forgetting to mention  the 2 year shelf life after  opening 
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: SawTroll on May 28, 2015, 10:43:18 am
I see no reason to not use 50:1 in them all - but I use only the Aspen premixed alkylat fuel that Husky etc. sells.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: alsled on May 28, 2015, 11:48:43 am
50-1 on the piston and rings is fine.  It's those little itty bitty crank bearings.   Little more oil won't hurt them. I run my saws, weed wackier, leaf blower, snowblower at 32:1. Redline race oil.   I use this oil in my snowmobile, 180 hp 8600 rpm. So far so good.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: HolmenTree on May 28, 2015, 05:42:08 pm
The oil lubricating demands are different for a liquid cooled  snowmobile engine then a air cooled chainsaw powerhead. ;)
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: aclarke on May 28, 2015, 07:15:05 pm
Ive never seen bottom end failures on work saws, but Cliff mentioned he used to have crank bearing failures on the saws run at 50 to 1 in the woods.  Didn't Bell do a test on mix ratios from 16 to 40-1 and found the richer mix made more hp? 
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: adam32 on May 28, 2015, 10:21:13 pm
Rupley showed me a test he saw one day that said 32:1 was the best for power and lubrication. I usually run 32:1 with 100LL and either Stihl Syn or Lucas Semi-Syn.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: HolmenTree on May 28, 2015, 10:36:24 pm
I think most failures  can be related to poor fuel quality  with ethanol. Too be honest I run 40:1 with Stihl full syn Ultra in all my work saws.
32:1 Yamalube R in my bikesaw.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: Bluegill on June 14, 2015, 08:49:42 am
I like 91 octane mo better than 100 & my saws are higher comp ported rigs. 91 with 40:1 is fine in all your saws.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: Cut4fun . on June 14, 2015, 09:19:32 am
Ive never seen bottom end failures on work saws, but Cliff mentioned he used to have crank bearing failures on the saws run at 50 to 1 in the woods.  Didn't Bell do a test on mix ratios from 16 to 40-1 and found the richer mix made more hp? 


I remember they had failures in short time in the cranks and or bearings in those solo 681's they got. 
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: Cycledude on June 14, 2015, 07:27:03 pm
Husqvarna recomends 50-1 and that's all I've ever used, I bought the expensive premixed stuff to extend the warranty but really never noticed anything different when using it compared to the 91 octane I normally use.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: jmester on June 14, 2015, 08:16:53 pm
I think as long as you are in the 90s for octane rating you should be fine. My old boss would run 87 in his saws and they just ran a little rough. I agree on the 40:1 ratio as mentioned above.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: mdavlee . on June 14, 2015, 09:01:42 pm
I like 87 e free. It's always the freshest. I've ran it in saws with 235 lbs of compression with no problems. 93 is always stale it seems from the pump. I just dumped a half gallon of the last 2 gallons of it. It was 6 weeks old at the most.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: jmester on June 14, 2015, 09:05:15 pm
No e free gas in my neck of the woods. I am not buying vp fuel for like 18.00 a gallon. You may have a point on the 87 being fresh. Have enough Harley's and sport cars around now it's warm again to get the 93 moving.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: mdavlee . on June 14, 2015, 09:22:41 pm
I bought 5 gallons of vp fuel for $70 delivered. I wanted some for storage fuel. I'll just keep buying 87 and if I remember put octane booster in it.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: Bluegill on June 14, 2015, 09:48:36 pm
87 is fine in chainsaws, no need at all to add octane booster.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: mdavlee . on June 15, 2015, 07:04:26 am
It just makes me feel better about running 87 in something with 200 lbs of compression plus.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: wild262 on June 15, 2015, 09:12:48 am
This time of year I don't even use a saw much and only have mix on hand for my weedeaters & such.  In the spring when I cut firewood for the upcoming winter I allways dump the gas out when finished getting my wood.  Then I pour some "canned" gas in, run it awhile, then put it in storage till late fall/winter.  Never had a problem that way.  We can get non-ethy here so that's what I use with Stihl Ultra @ 40:1.  I believe the gas is 91 octane.  This works great for me.  I never had a problem with this mix even 6 months old.  But I don't push it past that, and I dump it in the ole dump truck.  Ethynol laced gas goes bad in 2 months or less for me.  Keeping the gas caps on tight on containers is a must with this crap.  I gladly pay alittle more for the e-free, but I know its not avail to all.
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: Cut4fun . on June 15, 2015, 12:14:04 pm
Stihl requires 89 stock. Solo requires 91 stock.  Dolmar Echo dealer has sign in shop use 89 min. Husqvarna recommends using at least 89 octane

Madsen's suggest 91.  http://www.madsens1.com/saw_fuelmix.htm
Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: John Mc on June 15, 2015, 06:29:05 pm
I'm a pilot, so have easy access to 100LL since that's what my aircraft burns. I also know a bit about lead, since most of my working life was spent in a factory that heat treated steel in molten lead. There is no way I'd run 100LL in my chainsaw. That tetraethyl lead is a particularly nasty form of lead. You don't want to be breathing with your head just a couple of feet from a chainsaw exhaust burning 100LL. When my wife (who is also a pilot) was pregnant (or even just trying to get pregnant), we never let here deal with fueling the plane. While lead can impact anyone, it is particularly problematic for children with developing brains

While the "LL" in 100LL does stand for "Low Lead", it still has significantly more lead in it than the old leaded auto gas. It's only "low lead" when compared compared to the old 100/130 octane aviation fuel (which is no longer available) that had something like 8 times the amount of lead in it as the old auto fuels.

We've got 91 octane E0 (ethanol-free) gas at a few stations in my area, so that's what I use in my chainsaws. If that were not available, I'd switch to premium E10 (10% ethanol) before I'd even consider using 100LL. I don't run a race saw, so the extra octane above 89 or 90 or so doesn't get me anything.

Title: Re: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp
Post by: Jason K on June 30, 2015, 12:02:15 pm
I talked to Bob he runs all his saws on LL100. So I bought 5 gals of it and mixed it 40 to 1. I tell you my 1990 262 xp I can tell a big diff in it as well as my dolmar.  I was pulling my hair out snice last fall when the shell gas dealer sold out. They had unblended 93 I ran in every saw I own. Check every gas station around for 50 miles all 91 mutiblended not straight blend. Besides anyway LL 100 has a good shelf life vs std pump gas.I know that for a fact. Tell you one thing it smells strange..lol.