Which Chainsaw for Forestry

[Ratman]

Old conventional non strato Autotune saws are OK on Stihl red although it isn't the best but they will work and not cause issues. All Strato Autotune type engines should be run on Semi or full synthetic oil.
It is pretty simple, the new saws are designed to use the very smallest amount of fuel, two strokes lubricate all he internal bearings with the oil in the fuel used. Less fuel used means less oil getting to the bearings so the best oil will give better protection. As I said, pretty simple!
But I don't know a lot about these sort of things:sneaky2:

??? i have been lead to believe! [emoji6]

But nah, thanks for the info, just weary sometimes of synthetic oils as i have seen some engines (4 stroke) behave poorly and destruct when put on to synthetic oil, usually around year 1998 to 2003. I just put it down to the “big commercial changes” where semi’s and fully synthetic oils were being heavily introduced in to the industry. One particular thing that stood out to me was when we shifted from texaco 15w40 mineral to shell helix 10w30 semi synth in 2000 and a large proportion of our OM457 merc engines decided to die!
I’m only a “basic messer” (thanks Joe! [emoji849][emoji30])with chainsaws / concrete saws and tend to stick with most 2006 models and before, hence using stihl hp mineral with no issues. (As of yet)

[Ratman]

You say stihl hp mineral isn’t the best? What do you recommend spud? [emoji6]

[Stubby]

8 hours ago, Ratman said:

You say stihl hp mineral isn’t the best? What do you recommend spud?

I will but in if that's ok ? ....For me , just my opinion , its Red Line Racing 2T oil . There are plenty of other top quality 2T oils out there  though .

Edited December 13, 2018 by Stubby

[spudulike]

12 hours ago, Ratman said:

You say stihl hp mineral isn’t the best? What do you recommend spud?

Pretty agnostic on oil but am currently using HP Super. I don't do much cutting, mostly used for the last run up and tach before dispatch. Look at me as being the F1 Mercedes engine guru and the customer being Lewis! I rely on the end user for feedback, always have and have always got positive responses. The only saws I have detailed measurements on are the 372 and 357 as this was where I started. 

[wyk]

On 12/12/2018 at 07:31, The Technician said:

You have missed the point. All 2 strokes have seals. The way it has been done for years was you had the crankshaft, 2 bearings and 2 individual seals. The space between the seals and the bearings was usually 5mm. This 5mm was for cooling. In the 500 series, they put the seal in the bearing. This is why they don't last. I had one last week. A 555. Pulled off the exhaust and score marks. Pulled off the clutch and the seal spring was wrapped around the crankshaft.  It's usually the chain (PTO) side that goes as the shavings and oil get in it and the seal let's go.

I know several builders that aren't the least bit impressed with how the 500 series are put together, often citing the seals, and general QC on Husky's new products. Mastermind is probably the most vocal, or at least the one I read the most. He's likely seen it all. In a recent lot of Stihls he tore down, the only QC issue he found was a reversed sticker; presumably to warn the tree before the operator.

 

 

[gary112]

On 11/12/2018 at 14:12, The Technician said:

As a technician that has worked on machinery for 30 years, I have seen technology change through the years. When Husqvarna brought out the 500 series, there was a design flaw. What they did is removed the crankcase seals and inserted the seal into the bearing on both sides. The composition of the rubber would not take the heat and engines were blowing up within the first few days of use. Since then, they strengthened the rubber of those seals, but over time the rubber will deteriorate and the engine will blow. A 2 stroke engine does what is known as scavenging with its heat. When the piston is moving back up, it blows the exhaust out of the exhaust port, but when the piston goes past and blocks the exhaust port, some exhaust goes down the intake port, which, this is how the heat gets to the crankshaft and to the bearings and those seals. In my view, you will have those who love Husqvarna and those that love Stihl and other brands. But with any 500 series Husqvarna, don’t be surprised if the shop says it has score marks and needs to be overhauled! With these, the crankcase also needs to be split and the bearings with the seals need to be replaced. If you would like your chainsaws repaired by me, feel free to get in contact. Dana 07858 579436

I bought one of the first 550s when they came out, ran it on husky oil all its life and it is still going so cant have been much of a design flaw,put a piston and ring in about 2 yrs ago and no scoring on the barrel,happy days 

[The Technician]

Some were ok but most were not. All I am saying is that there were a lot of problems and of course design changes. Technology in small power equipment is constantly changing. I'll bet no one has seen the new (i) series come out by Stihl yet?? There is no carb or coil.  They have a fuel injector and a CDI control box, which has a spark plug lead firing the spark plug. The power generator behind the flywheel is what generates the power for the control box. Good bye back yard mechanics! So that's the belief! I've already seen them and worked on them! 

All in all, I'm not here to criticise anyone or any brand. Some love certain brands others hate certain brands. I have seen technology change through the years, but the interesting thing, how technicians have all but disappeared. A lot of shops struggle to find people that actually know what they are doing. This is now a common topic at a lot of shows and factory meetings.

[Rough Hewn]

Some were ok but most were not. All I am saying is that there were a lot of problems and of course design changes. Technology in small power equipment is constantly changing. I'll bet no one has seen the new (i) series come out by Stihl yet?? There is no carb or coil.  They have a fuel injector and a CDI control box, which has a spark plug lead firing the spark plug. The power generator behind the flywheel is what generates the power for the control box. Good bye back yard mechanics! So that's the belief! I've already seen them and worked on them! 
All in all, I'm not here to criticise anyone or any brand. Some love certain brands others hate certain brands. I have seen technology change through the years, but the interesting thing, how technicians have all but disappeared. A lot of shops struggle to find people that actually know what they are doing. This is now a common topic at a lot of shows and factory meetings.

What are we betting? [emoji12]

[Wonky]

48 minutes ago, The Technician said:

. Technology in small power equipment is constantly changing. I'll bet no one has seen the new (i) series come out by Stihl yet?? There is no carb or coil.  They have a fuel injector and a CDI control box, which has a spark plug lead firing the spark plug. The power generator behind the flywheel is what generates the power for the control box. Good bye back yard mechanics! So that's the belief! I've already seen them and worked on them! 

do you really think we’ve all had our heads in the pile of sawdust, of course we’ve seen and watch guys around on YouTube with 500i and comparing them to other saws.

and if you’ve seen them and worked on them what are your thoughts, oh,,,you got any pics to show us .?

[Sawchip]

1 hour ago, The Technician said:

Some were ok but most were not. All I am saying is that there were a lot of problems and of course design changes. Technology in small power equipment is constantly changing. I'll bet no one has seen the new (i) series come out by Stihl yet?? There is no carb or coil.  They have a fuel injector and a CDI control box, which has a spark plug lead firing the spark plug. The power generator behind the flywheel is what generates the power for the control box. Good bye back yard mechanics! So that's the belief! I've already seen them and worked on them! 

All in all, I'm not here to criticise anyone or any brand. Some love certain brands others hate certain brands. I have seen technology change through the years, but the interesting thing, how technicians have all but disappeared. A lot of shops struggle to find people that actually know what they are doing. This is now a common topic at a lot of shows and factory meetings.

So your not here to... "criticise anyone or any brand" .......As your first post included your phone number along with reference to your background , I take it what you are here for is to drum up trade for yourself. 

Edited December 13, 2018 by Sawchip