Which Chainsaw for Forestry

[adw]

So the might of Husqvarna have been getting wrong all these years, i will be sure to tell them, should get a laugh.

[spudulike]

I don't know much about two strokes but thought that the scavenging bit happened on the downward stroke and is the releasing of the exhaust gases caused by combustion just after the piston clears the top of the exhaust port and completed by the lowering piston releasing combustion chamber pressure and producing positive pressure in the lower crankcase pushing fuel and air through the transfers and scavenging the exhaust out of the exhaust port!

The heat in the crankcase is surely transferred heat from the piston and cylinder and not the exhaust gases - the only reason you would have exhaust gasses in the crankcase would be blow-by from the rings and piston leaking at combustion.

 

[Ratman]

So the might of Husqvarna have been getting wrong all these years, i will be sure to tell them, should get a laugh.

[emoji51]

[spudulike]

Just now, adw said:

So the might of Husqvarna have been getting wrong all these years, i will be sure to tell them, should get a laugh.

Erm....the last MS260, MS460 and MS660 I did had new seals fitted and .....well I thought they had the seal pushed in to the bearing!

[Joe Newton]

16 minutes ago, spudulike said:

I don't know much about two strokes.

 

?

[Ratman]

[emoji23]

Since you dont know anything about 2 stroke engines [emoji848].,..,,,,... [emoji51]?
and in conjunction with another thread you have been involved with, you have mentioned about using good quality 2 stroke oil. I personally have only ever used stihl hp mineral oil in all my concrete saws and chainsaws plus all others that i have fettled with.
So.... what are your thoughts on using or being forcefully moved to using, synthetic two stroke oils?

[Ratman]

Sorry joe ??‍♂️ not to drag you in, i just found your comment funny! [emoji6]? i was actually referring my last post to Spud, but do feel to contribute if you wish [emoji51][emoji106]

[Joe Newton]

14 minutes ago, Ratman said:

Sorry joe ??‍♂️ not to drag you in, i just found your comment funny! ? i was actually referring my last post to Spud, but do feel to contribute if you wish

Not to worry, the fact that you use the hp red oil means that you're a basic bitch and your opinion means nothing. 

 

I'll await the comments from hp super users and above!

[Ratman]

Not to worry, the fact that you use the hp red oil means that you're a basic bitch and your opinion means nothing. 
 
I'll await the comments from hp super users and above!

Twat!

[spudulike]

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