Chainsaw oil mix

[rodp]

I usually put a bit in for luck Phil, although not supposed to, it just seems right.

[hairyyoda]

Rod, biggest risk for a piston pick-up is when chainsaws are running too hot when cooling fins are gunged up with oily sawdust and the oil in the mix is on the lean side or seal/gaskets sucking air etc., the oily sawdust and wood chippings get baked on and around the cylinder cooling fins. (oven or barbeque cleaner, or drain un-blocker cleans good but wash off if cylinder alloy starts gassing off)
Have a google about the "home built" big bore Husqvarna "Frankenvarna" up grades where the larger 60cc and 70cc cylinders and pistons are swapped out onto the 50cc saw magnesium chassis. Engineering wise some Husqvarna model saws are like a pick and mix Meccano set, there are some older Jonsered saws (same parent company as Husky) that happily go above 20,000 revs out of the wood.
Another addiction
Phil

[sunndog]

The 242 was a belting little saw. I'd have one if i saw one in good nick

[rodp]

Rod, biggest risk for a piston pick-up is when chainsaws are running too hot when cooling fins are gunged up with oily sawdust and the oil in the mix is on the lean side or seal/gaskets sucking air etc., the oily sawdust and wood chippings get baked on and around the cylinder cooling fins. (oven or barbeque cleaner, or drain un-blocker cleans good but wash off if cylinder alloy starts gassing off)
Have a google about the "home built" big bore Husqvarna "Frankenvarna" up grades where the larger 60cc and 70cc cylinders and pistons are swapped out onto the 50cc saw magnesium chassis. Engineering wise some Husqvarna model saws are like a pick and mix Meccano set, there are some older Jonsered saws (same parent company as Husky) that happily go above 20,000 revs out of the wood.
Another addiction
Phil

Same with any two stroke though Phil, or even four stroke, when air cooled. Used to stop now and then when doing trials and clean fins out if the going was claggy mud. It could fling up even with mudgaurds and flap on the front.
Sucking air, either through an intake leak or crank seals will make them run very weak and that's bad news, not only are you not getting the right fuel / oil mix but they run hot and can cause pre ignition and that can be disasterous to an engine.
This 181 can apparently use a lot of the 281 parts so should be OK for a while, I'll not use it much anyway so should last me out.

[hairyyoda]

The 242 was a belting little saw. I'd have one if i saw one in good nick

Adam.
A non running 242 xp with no bar and a no clutch cover with the all the other covers/chassis very clean and undamaged, went past £180.00 on flea-bay a few months ago. I put £162.00 it in the dying 10 seconds and was convinced it was mine.
I failed badly on estimating the value that little sleeping jem would make.
Thanks
Phil

[sunndog]

Hells teeth, i don't like em that much!

I'd have another ms260/1 for that kind of money