Joe wrote: "I may have in the past gave it a shot of WD-40 thinking that it was good for it."
Joe, You are correct in considering that the WD-40 used in your throttle cable could possibly be the problem. WD-40 was originally designed to prevent surface corrosion, but also has limited use as a penetrant and lubricant. The problem is that the lubricant over time can change and become very gummy. This can be a problem when the WD-40 is in enclosed areas that are difficult to clean. It is not uncommon for this to cause malfunctions in semi-auto rifles and pistols. (The penetrating qualities can also contaminate primers in ammunition.) I would suggest not using WD-40 on close tolerance moving parts in an aircraft unless they are easily accessible for thorough cleaning and proper lubrication. Rich Hartwig Waunakee WI
