Hey Testpilot6 If you want it here is what I found .The bolt pattern is correct. I marked it out on a large board and mounted the engine .Then I bolted a flat board on the prop adabtor and a pin and turned the prop with pin on it full rotation and this gives dead center for prop swing. The 49 should be divided like this. from center down bottom of engine mounting bolt is 30mm and up to top of engine mounting bolt is 19mm . Hope this helps you. Fooped