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Posted on Jan 02, 2017
ProMac 850 is 82cc capacity motor & Fuel mix is 25:1 - especially now that we only have unleaded... best to use BP Ultra 98 octane as these saws were designed to run on Super leaded fuel. I used to own a 797 Super (123cc motor)
Posted on Jul 30, 2009
Oil is mixed with gas for 2 cycle engines only, not 4 cycle engines.
Try this site for owners manual. Hope this helps.
Posted on Aug 23, 2009
SOURCE: mcculloch 310 oil mix ratio
The proper gas/oil ratio is 50:1, that is 50 parts gas, to one part (2) cycle oil.
If you plan on leaving gas in the tank when not being used, I always recommend adding some gas stabilizer, such as Sta-bil, which makes starting the chain saw easier regardless of how long the fuel mix has been sitting in the tank or saw (up to 2 years according to Sta-bil label)
Hope you find this Very Helpful and best regards!
Posted on Sep 09, 2009
There is no set adjustment on any blower or chain saw. If it were that simple there would be no need for adjustments. The problem is that most equipment manufactured in the past 10 years can not be adjusted by the user. Carburetors are now equipped with either adjustment limiters which limit the adjustment to less than half a turn or with adjustment screws that require a special tool to make the
adjustment. More than likely you will have to take it to an authorized dealer for those adjustments.
If you do have an adjustable carburetor, then gently close both needles and open each on 1 full turn. This should allow the engine to start and the final adjustments can be made at that point. If it still will not start then open each needle 1/8 to 1/4 turn and try again. If this still does not work then most likely your carburetor needs a good cleaning and a rebuild kit.
Posted on Sep 20, 2009
Posted on Sep 28, 2009
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