Re: Here’s a question almost as provacative as what brand of 2-stroke oil is best…..

Home Forum Ask A Member Here’s a question almost as provacative as what brand of 2-stroke oil is best….. Re: Here’s a question almost as provacative as what brand of 2-stroke oil is best…..


rudderless


Replies: 159
Topics: 5
#75125

…just so ya know..
..contact points scrub sideways during the engagement and disengagement process to keep them clean..or to scrub away any oxide that developed during their operation. A contact that sticks closed is worn and has craters that keeps the contacts from moving sideways which holds them closed when they are supposed to open. This scrub is about oxide management.

Contact points for motors do not scrub sideways. They need a high pressure contact area for oxide management…which is why one point is convex. If both points are flat and touch evenly the oxide that forms between the points can form a film of insulating oxide and can keep them from touching or contacting. The oxide can return much sooner on flat contacts with no scrub since there is no hi pressure area to push or beat through the oxide.

Point is if the points are worn flat they should be properly reshaped if one doesn’t want to be back under the wheel any time soon.

So…new motor runs great for years. Out of nowhere the spark stops after years of use. One cleans the points of the oxide and spark returns…for a little while. So the point system gets a bad rep for high maintenance when actually they need reshaping or replacing to reestablish their reliability.