Here is a fs74 which has a very similar powerhead, this one has been cooked and seized to death, everything ls on it should be okay, but somone ran it without oil....

[Linked Image]
[Linked Image]

If you can measure the distace between the mounting hoels the coil may fit, the coil on yours may be fine, maybe try it with the kill switch disconnected near the coil quickly to rule out any wiring issues.