I picked it up last week and did the break in over 3 days. After day one, I changed lower unit and case oil for piece of mind...will change again this week to make sure any tiny pieces are out. I tried my best to find a 2stroke 9.8 leftover but couldn't locate one. After deciding to go ahead with the 4stroke, I used the 2stroke search as a test for my local dealers...I knew they didn't have any but was looking for the most personable one (willing to try). The first guy that made an effort got my business...but for the 4stroke. Anyway, the motor is a work of art--I may just like this 4stroke