I have a Husqvarna 335 purchased 2 years ago. It's a great little limbing saw; however, after it warms up it won't rev up to full throttle. I've talked to a couple different chainsaw servicemen, and they all agree that it is the crank shaft seals. Question 1: Is this problem widespread, and if so, should I contact Husqvarna? Question 2: Should I get the parts myself and try to fix it, or should I pay app. $200 to get it fixed? As I understand it, the seals and bearings are one unit, and this could be a problem putting them in the case. Is there a special tool to do this? All suggestions welcome.