Pilot,


Redo the break-in on a test stand, following [link=http://www.rcuniverse.com/forum/Tapered%2DBore_Engine_Break%2Din_%2D_Upgraded/m_1850473/tm.htm]this thread[/link] closely.

Use a [link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXJA89&P=ML#mults]TowerPower[/link] plug (instead of the idle-bar jig you now have). It is medium heat, made in Japan and less than half the OS #8's price.

Dave Gierke saw 12,150 on this prop, immediately after break-in.

You should too...