Thanks CenRacer. Yep, you were right. The OS .18 uses the factory NT-16 engine's flywheel and clutch set. I fired up the OS using the pull starter and it ran on the first try. I had it idleing for a few minutes. It ran perfectly. I just changed the pull starter to a tiger drive adapter, my personal preference. One quick press from my 12volt drill and the OS runs again. Thanks again for recommending this engine. It looks great. I love the large heatsink on the OS. I wish that CEN offered a larger heatsink for the factory NT-16 installed engine. Now its time to properly break in the OS engine. Im looking forward to this weekend to see what this baby can really do..
