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I have a Silver Eagle McCulloch Gas Blower. Mod 400048-14 Ser # 16-039739. What fuel mixture does it use? AND It has no spark. Plug looks good but a new one might help. Ken

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The fuel ratio is determined by the oil and not the machine. Not all

oil is the same. When a manufacturer recommends a fuel ratio,

they are trying to direct you to the oil that they offer for sale. Over

the years 2 cycle oil has been offered in 16:1, 32:1, 40:1 and 50:1 .

Unfortunately for the user it is easy to get confused when selecting

oil. It is not difficult if you just think about it. There are two major

differences in 2-cycle engines. There are water cooled and there

are air cooled engines and the oils are entirely different. Water

cooled (outboard) engines run at much lower temperatures and at

much lower RPM's. It is necessary for outboard oils to burn during

the combustion cycle. In this situation the oil turns to smoke so

that the oil is not deposited in or on the water. Air cooled engines

run at a much higher temperature and must not be used with

outboard oils. In an air cooled engine the oil should leave the

muffler in liquid form. If the oil turns to smoke it is not able to

lubricate the engine and a very undesirable carbon deposit is left

behind leading to engine failure or stuck piston rings.

Since a top quality mixing oil will cost $12 or more for a six pack

(that comes out to well over $100 a gallon of oil) there is little

wonder that so many companies want a piece of that pie. Cheap

oils no bargain even if it is free. If the oil says it is for outboards,

lawn mowers, string trimmers, and chain saws, they are telling you

that they know nothing about 2 cycle engines and only want to take

your money.

You should choose an oil whose brand is that of an engine

manufacturer. Obviously these companies are not in the oil

business but they want to make sure that they do not cause

warranty claims from an inferior oil. The life of you engine is

dependent on choosing a good grade of oil. You should pick an oil

that you trust and that you can purchase on a consistent basis.

Unlike gasoline, oil does not deteriorate with age. It is better to buy

enough to last you a year or two than it is to change brands every

time you run out.

Posted on Sep 14, 2009

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