You can find the Hirobo manual on the internet,which tells how to assemble the helicopter along with a parts list. To remove the engine was not to bad. The muffler was removed,along with the gas line. Remove the wiring and fuel turning screw. Four bolts hold the motor bracket in place,two on each side. I had to make a wooden stand so I could turn the helicopter with the bottom up. Then remove the screws that hold the bottom of the floor plate in place. You can then remove the engine from the bottom of the helicopter..A special lathe bracket had to be made to hold the prop adapter.The prop adapter was turned in a lathe to make the right size threads. This took quite a bit of time as I do not want to bend the shaft. These pictures show some of the process that I went thru.








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