If this is the .28 I have heard that there is a problem with it leaking around the pullstart area after breakin. You might want to check out the Global forums for the fix to this.
XTM and SH engines run best on 14%oil content any more than that it really degrades performance. The higher oil content fuels can also cause leakage around the pull start, especially if you run the motor rich.

http://globalservices.globalhobby.co...orum/index.php


rolland