wood dust in the carb hard on the saw?

[heimannm]

My Jonsered 621 had only a fine brass mesh screen for an air filter. That saw was my primary firewood saw for 25+ years and cut all kinds of wood, not all of which was clean and sound.

The saw finally succumbed to a failed bearing on the PTO side, but was still running strong right up to that point.

I am only making an observation where and am not recommending that everyone switches to a brass mesh screen.

Mark

 

[Mad Professor]

Can we at least agree that it is better to keep the air ingested clean as possible?

 

[L34]

Aussie saws are well used to it- the whole big chunk of land mass is just one big red dusty Island- from the roads, the fields and the trees........

Not here in Tassie Bob.

 

[Bob Hedgecutter]

Not here in Tassie Bob.

Yeah na mate- you live in the much gooder small Island.

 

[rogue60]

Another high hr well used abused saw ingesting sawdust fines.
I'm failing to see any major damage caused by fines getting through?
But sure if fines worry you keep it spotlessly clean and sleep well at night.
Personally I ignore fines and just get on with it lol

 

[Gord404]

Smoke particulates are finer than the filter pores. Those saws must take some work to get cleaned up.

Think about what your lungs go through doing that work

Ya the firt time I pulled one down I thought to myself -this saw must have really got over heated but why isn't any scoring on the cyliner- hmmmm - then more came in, all the same- do what needs to be done and back to work they go

 

[heimannm]

 

[huskihl]

Another high hr well used abused saw ingesting sawdust fines.
I'm failing to see any major damage caused by fines getting through?
But sure if fines worry you keep it spotlessly clean and sleep well at night.
Personally I ignore fines and just get on with it lol

View attachment 1198561View attachment 1198562View attachment 1198563View attachment 1198564

And you didn’t need the latest and greatest 100% fully synthetic oil for it to last that long

 

[stihltech]

Fines are a fact of life. No air filter will stop them all. Maintenance is a must.
When you work in a shop and you cannot see the filter because the sawdust is caked around, but the piston is still OK, you know the filter is doing it's job even if there are fines.
As posted before, the worst air filtration is the one that is never cleaned.
I have never understood the quest for the air filter that will last longer without cleaning.
It is maintenance. Do it. Daily.

Oh and yes, the air filter DOES need to replaced more than once in ten years.

 

[heimannm]

 

[toppers]

Fines aren't that big of a deal, at least as much as everyone obsesses over them on this forum (it seems). Case in point the replies above...fine particulates do not turn your piston into a scored mess like is commonly perceived. More important to counter this is a quality oil at a better than 50:1 ratio (40:1-45:1)

 

[stihltech]

View attachment 1198924

View attachment 1198925

Looks like a normal day in the shop.

 

[lone wolf]

Aussie hardwoods dry Red Ironbark and Box.

Sounds dense!

 

[Tobystihl]

Fines aren't that big of a deal, at least as much as everyone obsesses over them on this forum (it seems). Case in point the replies above...fine particulates do not turn your piston into a scored mess like is commonly perceived. More important to counter this is a quality oil at a better than 50:1 ratio (40:1-45:1)

I agree, I think it is all fuss over nothing, imagine how much fines we inhale.....

 

[bwalker]

Another high hr well used abused saw ingesting sawdust fines.
I'm failing to see any major damage caused by fines getting through?
But sure if fines worry you keep it spotlessly clean and sleep well at night.
Personally I ignore fines and just get on with it lol

View attachment 1198561View attachment 1198562View attachment 1198563View attachment 1198564

All your pistons show excessive skirt wear.
There is nothing wrong with expecting an air filter to actually filter.

 

[Bob Hedgecutter]

All your pistons show excessive skirt wear.
There is nothing wrong with expecting an air filter to actually filter.

Couple of thousand run time hours will show skirt wear as well and this guy put hours on saws.

 

[HansFranz]

All your pistons show excessive skirt wear.

So...another say 5k hours and maybe consider replacing the pistons?

Wups, Bob beat me to it.

 

[bwalker]

Couple of thousand run time hours will show skirt wear as well and this guy put hours on saws.

Sucking wood dust does help with that.

 

[Bob Hedgecutter]

Sucking wood dust does help with that.

Not denying that fact- but this is not a low hour low use piston and I willing to wager honest work wear in this instance far and away exceeds any fines wear.

 

[HansFranz]

Yeah, and I'm thinking -- considering how many hours of runtime it probably took to get that little bit of wear on the skirt -- that replacing a piston after all those hours would add an additional cost of (let's say) 1/2 of 1% of the cost of fuel and oil used in the same time frame...griping about having to replace a piston after 10k hours is like griping that your Bic lighter went dry after "only" 100 cartons of Marlboros. How many sets of lungs did you go through in the same time period?

There's also the issue of lost productivity if you clean the air filter eleventy bajillion times in that 10k hours...how many man-hours did that take? I'm betting that replacing a piston every 5 years would be far cheaper in the long run...not to put too "fine" a point on it...