jonsered 445

[GiantSlayer]

does anyone see anything wrong with this

 

[chevy]

It looks ok but I would do a compression test and compair you findings to factory specks.

 

[BostonBull]

Single ring piston, light carbon staining, minimal deposits on the exhaust port......looks good to me!

 

[GiantSlayer]

It's a 455; I can't seem to read. It's been in hard use for two years. I was using it the other day in triple digit heat when it started to run slower and slower and began to spit fire out the exaust. I've haven't burnt a saw up since 1980 (and don't even remember what it was like) when I was using a special oil that was mixed 100:1; don't ever try it no matter what they tell you. I remember it had great power for a couple of weeks.

Anyway, I can't get this little thing to run anymore except in little fluttering spurts since. I expected the thing to be scored but it looks great in there and the compression feels normal.

Unrelated, (I think); since I lost that saw years ago I have always mixed my oil at 25:1 no matter what I was running it in and no matter what people and manuals told me. I've been told that I would have a great buildup of carbon if I didn't run 50:1 but this piston is clean on top and has a delighful film of oil on it's sides. FWIW.

When it started slowing down & spitting fire I thought my sins had caught up with me and it had some kind of chimney fire going on in there with all the carbon I had built up, but I guess not; the muffler is as clean as can be.

 

[GiantSlayer]

I got it fixed; the back end of the switch was loose and seems to have been shorting the out mag. Isn't there is always something new around every cornor?

 

[BostonBull]

PLEASE PLEASE PLEASE switch to 50:1. So long as your using a good quality mix oil, i.e. not one from Wally world or tha auto parts store/homedepot.

And 89 Octane or better!

 

[GiantSlayer]

One would have to be a chemist to know if there is any thing more to name brand oil than the name and I am not one; I'm just an uneducated tree cutter.

should I pay 10-12, or whatever it costs, a gallon for stihl bar oil also because it makes the chain cut ???% faster and keeps the world more...? Green, better for Stihl shareholders, which?

How did you know where I buy my stuff?

 

[GiantSlayer]

there's got to be a difference between an .049 cox airplane engine and an old 8.5 ci barking chug along 090. No?

 

[BostonBull]

We arent talking about bar oil, at least I am not. I dont mix my bar oil @ 50:1, I use it straight up. Not sure where the confusion came from????

I have read numerous articles from major manufactuers of oil, Stihl, Husky, Mobil, Omni (makes Stihls oils), Pennzoil (used to make Husky's oils). The proof of lubricity is there. A virgin oil has less contaminents and better lubing properties than reclaimed oils do. If reclaimed dino oils lubed that well F1/NASCAR racers would be using it.