More like 70% to 80% of the day for us...and we run 8hr days...unless its a contract job and nice days sometimes we put in 10's. 600hrs seems really short...i know the amish logger that i talk to all the time..he has 066's and 660's that have 4years of logging on them..and they still run real strong.....never had the top ends off of them...and i know they run their saws pretty hard all day long....they also have a 460 that i think is 3 years old...never touched it either...he said he used to run 395's and he go 4 years out of them as well.......he was gonna trade in the 066 and buy a new one just beacuse of its age...i said he11 no!!...run it till it quits...and let me know when it does ill buy it!!..lol And my boss has a 046 in the woods truck and i think its 7 years old...it has ALOT of logging hours on it...and it still runs strong! Sad part of it is...he braggs up the dolmars pretty heavy but we all use the stihls more..lol I dont know...to each his own...im a husky and stihl man...mainly huskys but i dont have anything really against stihl either.....but i can honestly say that the dolmars dont impress me...they arent a poulan...but they aint a husky or stihl either in quality and reliability.but if you ask me 7900 vs 385xp=385xp wins every time.....7900's have the rpm for the small wood...but not the raw grunt power of the 385xp for the big trees. I've seen it and ran both ALOT....385 always comes out on top..regardless of what any cookie cutting movie tells you....
Bull.