Topic: ARC Flywheel

[chini]

  I was trying to fire the boys mower when In realized there was no spark. So I changed the coil to no avail. Still no spark. I got a phone call, and while Talking I found the magnets in the ARC flywheel are bad. Any one else have this Problem? It ran the last race of the year OK.
  It kind of irritates me off that you pay for good parts that don't last. So now the circus begins to get new magnets and take it all back apart to fix it.
          Kevin

[evansop]

How did you determine the Magnets were Bad?? In my 30+ years of mower repair I have never seen this (unless the were cracked or broken).. I have see more than 1 ignition module bad.. and I have seen the wrong module installed and installed backward that reverses the North and South pole and not fire.. Just curious…..

[The Tank]

Ive only seen this happen once but it was on a kohler v twin command engine with a stock flywheel. The magnets just got very weak. Replaced the flywheel and the engine ran great. Thats been the only occassion Ive ever seen.

[chini]

  I put a nutdriver against the magnet. Didn't stick at all. Went to private reserve and got a new intek wheel, and had to pry nutdriver off that one.
  So the boy and I changed the ring gear and hub and it's running. Still makes me mad thou.
             Kevin

[Burwell555]

There are 2 things on the ARC wheel that look like magnets. One is the actual magnet, the other is a non magnetic bobweight to equal out the weight of the ignition magnent.

[PJG56]

ABSOULTY________________________________________*

[Running on Empty]

Yea, how the Heck does a magnet sudenly decide not to be a magnet no more?

[Toadworks]

From the www...........

http://www.kjmagnetics.com/neomaginfo.asp

Neodymium Magnet Information

Demagnetization
Rare Earth magnets have a high resistance to demagnetization, unlike most other types of magnets. They will not lose their magnetization around other magnets or if dropped. They will however, begin to lose strength if they are heated above their maximum operating temperature, which is 176°F (80°C) for standard N grades.  They will completely lose their magnetization if heated above their Curie temperature, which is 590°F (310°C) for standard N grades. Some of our magnets are of high temperature material, which can withstand higher temperatures without losing strength.


Maybe your fly wheel was subjected to high heat? Not thinkin' it saw 590 degrees though... Oh and I do not know what grade the neo's are either. They might even have a higher heat tolerance.

[George Herrin]

Call Tom at ARC and speak with him.