Chainsaw Question

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lCS-660EVL product info

Karl, A 60:1 ratio would be around about right for a used saw, any richer & they tend to get a bit fumy, you could go leaner but you would need to know what you are looking at & interpreting the signs... a little bit of acquired science there... If you get it wrong it can led to over heating & seizure, I’m sure others will offer variations on the above, so it’s a starting point & like everything else in the forum... Food for thought... that’s what makes it so good. Cheers Ron.

60 :1 ???? are you serious ??? I worked for Mc culloch power tools for about 4 years as a servicing / repair guy to all there products inc chainsaws / brush cutters / petrol blowers and cut off saws - this also included the german chainsaw brands Sach Dohlmar.

THE RATIO FOR ALMOST ALL HIGH REVING 2 STROKE IS 20 :1 or 25:1

we used to get at least 5 saws in a week that were only 2 months old that had completly seized - and they were running 50 :1 ratio - even though the OWNERS manual stated 20:1 - the main culprit was an oil called Optimal which claimed 60:1 ratio was safe to use.

BEST way to test oil / fuel (if unsure of how to make correct ratio ) PUT fuel and oil into a clear container with lid ---- shake well --- no oil in fuel mix with have all the bubbles on the top disapear almost instantly - oil with about 20:1 mix will have bubbles disapear in about 5 - 7 seconds and so on

IF you use a 50:1 ratio and your saw has not been correctly tuned ( high and low ) on the carbi then it will scream its head off and end results will be premature wear OR seized saw - Some of the begining signs are that the saw will be very hard to start when hot , but starts easily when cold and poor idoling.

Hope this has been of some informative help for you

Boc

Karl,
I use this Echo chainsaw
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Bought from the site shown.

My service manager recomended I use Castrol "AIR COOLED ENGINE OIL" @ the lower number, yes a richer mix but does not give heaps of smoke and idles good with plenty of power and engine protection.
A good quality oil is imperative if used hard and often.

Keep the chain sharp and well oiled and you will have no problems, you have a good product and with easy maintenance.

I use the saw for tree felling and fire-wood cutting so it gets a good workout, is still in as new condition.

Hi Karl,
My stihl manual says 'We recommend STIHL 50:1 two stroke engine oil since it is speciall formulated for use in STHIL engines. The mix ratio with STIHL oil is 50:1, or 25:1 with other branded two-stroke air-cooled engine oils.'
I have mixed to this ratio for the last 9 years no probs - using STHIL oil.

How old is the saw, make sure it has an inertia brake. Old saws can be a dangerous thing.
Paul.

All of our chainsaws, brush cutters etc as well as small petrol pumps we run at 100:1 using Optimol oils, have had no problems over the last 15 or so years. Some of this gear is used on a daily basis.

Thanks to all for your advice. I have given it a good clean, refueled it using a 50:1 ratio using Hasquvana Oil (as reccommended by my local dealer), added the chain oil etc - now I just have to get the ****** to start!!!

Karl

Pull out and check plug. Add a couple of drops of fuel, replace plug and start.