sthil saw for parts or repair

It is a ms50 topping saw 12 inch bar I've had it almiost 3 years it was working good and it has given me no problems up till now it has no spark it may be a coil I pull it a bunch of times and only get a very faint spark half the time it's time for a new one and I bought a slightly bigger saw open to any offers or trades I will take a pic and add it later when I can