Hello Everybody,

I have some questions regarding the internal compositions of the engines. I have a OS .50 and a thunder tiger .46 engine. The OS engine was used less than 5 times and it was spoiled. The engine could not be left in an idle state because the is no more compression.

When I flip the propeller, it will not bounce back, instead, it will turn in the same direction. I opened up the engine crankcase and found that my ball bearings, crankshaft was very very rusty. Please advise me on any ideas to solve this. (eg: Any spare parts for the engine that I can change...)

For the thunder tiger, the same problem occurred. But for now, it still has compression, so it can still be used for the moment. But the crankshaft and ball bearings are also rusty. In some cases, when I stop the engine by closing the carburetor, the propeller would somehow seem to get stuck.

The OS Engine got rusty was maybe due to my crash landing. it landed into a pool of muddy water. However, my thunder tiger did not come into contact with any water but how in the world did it get rusty?

Does anyone have any solution to help me out? I will be very glad if someone will just post his comment(s).

Thanks a lot!