Gas Blowers

[CHDinCT]

Originally Posted by JDGREEN4ME

Man I guess I should read the manuals...I have two Stihl chain saws and on my second tank of fuel in my new blower and I have been running 87 octane...with no problems (that I am aware of) or starting issues.

Same here, except I have been running 87 octane in my Echo PB-4600 backpack blower for over 10 years only to notice this year the manual spec's 89 octane. I probably read that when it was new and just forgot it over one winter. As long as I use fresh gas and fuel stabilzer, it starts on the first or second pull and runs strong. My only complaint is it's smokes so much. The newer equipment runs much cleaner, so much so, I'm thinking of selling the Echo and buying a Stihl BP-550 or 600, just for my lungs.

[Bird]

I, too, used the 87 octane in my Stihl string trimmer the first year or two with no problems. I'm no mechanic, so I don't really know how much difference it makes, but what I've read is that the lower octane gas may allow the machine to run hotter, perhaps overheat, and be damaged. Maybe if you're not working it at maximum capacity and speed, that would never happen????? I don't know, but for the amount of gas I use, I don't mind paying a little extra for the 89 octane.

[coobie]

Originally Posted by WH401

I have 3 pieces of Stihl equipment, a 390 saw, a BR600 blower, and a FS90R trimmer. The saw was my father's and sat for the 3 years without being started. I took it out and it started right up on the 5th pull, with the same 3 year old gas and everything. Up until now I've never had 2-stroke equipment that started on the first pull. But, that all changed with the BR600 and FS90R. I push the prime bulb 5 times, turn the choke on, pull the cord out ever so slightly so that I can feel it has grabbed the motor, and then I give it a yank and it easily comes to life.

As others have said, ethanol has wrecked havoc on anything with a carburetor, especially small equipment, since it was introduced. That said, I run a mix of Amsoil Saber 2-stroke oil at 80:1 w/ 89 gas, and I also added 2 ounces of Sta-bil to each total gallon for fuel stabilization. This combination has never given me problems and has completely changed the running characteristics of any piece of 2-stroke equipment I have previously had. Some may say, "what?, you run 80:1", yes I do, but I have run it this way in all my equipment for years and I've never had a failure.

I always burn at least 91 oct.gas and use seafoam fuel additive in all of my 2 & 4 stroke equipment.coobie

[Baucom]

I always run premium from 1 of a few stations around that advertise "no ethanol" in their gas, mixed with Shindaiwa oil @ ~40-45:1. The Shindaiwa oil includes a fuel stabilizer, so I never add any additional stabilizer. I dump the gas out of the tank and run them dry before I put them away for the winter--haven't had any problems starting any of my saws, trimmer, or blower yet.

[Bird]

I don't think we have any stations with gasoline without ethanol. If such exists, I sure don't know where.

[WH401]

There's a couple of reasons why manufacturer's prefer you to run 89 octane fuel, one of those is because of the current ethanol content in gasoline. When lower octane fuel containing ethanol comes into the cylinder on a 2-stroke engine, it ignites from the hot spots on top of the piston and not from the spark plug, thus causing detonation. Running fuel with an octane rating of 89 or higher stops this uncontrollable ignition sequence, thus increasing the life of the engine. Another reason is because 89 fuel contains more detergents and produces a cleaner burn in the cylinder than 87. Running a high octane rating is especially important with 2-stroke engines with valves since it greatly decreases the chance of carbon build up.

[CHDinCT]

Originally Posted by CHDinCT

Same here, except I have been running 87 octane in my Echo PB-4600 backpack blower for over 10 years only to notice this year the manual spec's 89 octane. I probably read that when it was new and just forgot it over one winter. As long as I use fresh gas and fuel stabilzer, it starts on the first or second pull and runs strong. My only complaint is it's smokes so much. The newer equipment runs much cleaner, so much so, I'm thinking of selling the Echo and buying a Stihl BP-550 or 600, just for my lungs.

Well, pulled the trigger on Friday. Was all set to buy another Echo backpack blower, specifically the PB-755T. I stopped at an Echo dealer on Thursday and tried one out. Very powerful. I knew it was heavier than the Stihl BR-600 and maybe not quite as powerful, but I had made up my mind to stay pure 2-stroke after reading a bunch of threads comparing various models. Then, on Friday, I stopped and tried the Stihl at a dealer that sells both. The Stihl just ran smoother, was quieter and was noticeably lighter. After the salesman assured me that the 4-mix units were proven in the field by commercial landscapers, and that it should hold up just fine for homeowner use, I decided to get the BR-600. Used it last weekend and was very impressed with it's power and smoothness.

A few things I don't like vs the Echo: it seems to have more plastic parts or lighter plastic, but I guess that's part of the weight difference, the fact the air filter is harder to get at to check/replace, the cruise control can only be set to 3 pre-determined speeds vs infinite for the Echo, and just generally that it looks to be harder to remove the shroud for maintenance/cleaning. All these were secondary, however, to the power and smoothness of the unit. In short, I guess I was taken by the BR-600. Hopefully, it's a long and happy relationship.

[WH401]

Originally Posted by CHDinCT

Well, pulled the trigger on Friday. Was all set to buy another Echo backpack blower, specifically the PB-755T. I stopped at an Echo dealer on Thursday and tried one out. Very powerful. I knew it was heavier than the Stihl BR-600 and maybe not quite as powerful, but I had made up my mind to stay pure 2-stroke after reading a bunch of threads comparing various models. Then, on Friday, I stopped and tried the Stihl at a dealer that sells both. The Stihl just ran smoother, was quieter and was noticeably lighter. After the salesman assured me that the 4-mix units were proven in the field by commercial landscapers, and that it should hold up just fine for homeowner use, I decided to get the BR-600. Used it last weekend and was very impressed with it's power and smoothness.

A few things I don't like vs the Echo: it seems to have more plastic parts or lighter plastic, but I guess that's part of the weight difference, the fact the air filter is harder to get at to check/replace, the cruise control can only be set to 3 pre-determined speeds vs infinite for the Echo, and just generally that it looks to be harder to remove the shroud for maintenance/cleaning. All these were secondary, however, to the power and smoothness of the unit. In short, I guess I was taken by the BR-600. Hopefully, it's a long and happy relationship.

Congrats on the purchase, that 600 should last you for a long while in a homeowners hands. I have run mine for 4+ hours at full throttle, only stopping to fuel up, and it never misses a beat. The most important thing with the 4-mix engine is the quality of the fuel/oil mix used. Use at least 89 octane gasoline, as it has more cleaning detergents to prevent carbon build up, and use a high quality synthetic such as Stihl Ultra oil or Amsoil Saber.

[lizardman]

Man, this thread got longer than ever I figured it would.
I got a Stihl BG55 handheld. I dont even have it put together yet. Can't wait to use it and then let it keep its cousin, the FS110R trimmer, company on the wall. Now, if I could just get rid of the ugly yella Poulan saw and get me a Stihl so my wall will be lined with orange, the world will be a happier place!!

On a side note, does Sta-Bil go bad? I found a bottle I bought that must be at least 8-9 years old. I dont think I ever opened it because I sold my boat before needing it. So, what say... Use it or just buy another bottle?

Rod

[WH401]

Originally Posted by lizardman

Man, this thread got longer than ever I figured it would.
I got a Stihl BG55 handheld. I dont even have it put together yet. Can't wait to use it and then let it keep its cousin, the FS110R trimmer, company on the wall. Now, if I could just get rid of the ugly yella Poulan saw and get me a Stihl so my wall will be lined with orange, the world will be a happier place!!

On a side note, does Sta-Bil go bad? I found a bottle I bought that must be at least 8-9 years old. I dont think I ever opened it because I sold my boat before needing it. So, what say... Use it or just buy another bottle?

Rod

Buy another bottle. I believe on the bottle that I have, which I bought about 2 years ago, it says to discontinue using after 2 years basically because it's lost it's effectiveness.