It's 6 Years - 3 yr warranty plus 3 yr extended warranty for free. They're great engines! I have a 140 and it's amazingly quiet, fuel efficient and powerful. I've put on 105hrs since I launched her this spring - not a hiccup so far. Lots of guys on thehulltruth.com discuss the engines - pretty much all positive reviews.
Here's the link -
http://www.suzukimarine.com/showsand...6_reloaded.php