In reply to Richard Wademan's query about removing white aluminium oxide corrosion from the exterior surfaces of engine components, I would suggest rubbing with a mild abrasive pad (such as a maroon Scotchbrite 3M pad - https://www.cromwell.co.uk/SCH2457002C) soaked in parafin or ACF-50 (http://www.acf-50.co.uk/).
Once the corrosion has been removed and the surface dried, protect the metal with a few passes of clear engine lacquer from an aerosol can.
This has worked for me. It can be laborious to get corrosion and dirt off the engine surfaces with a pad and parafin but it seems effective.
I would like to suggest a topic as people like me who bought a Rotax engine 912ULS used and do not know who was the first owner who has registered the motor, we could have access to or reregister engine to have a historic engine since new.
Tks
Eliel
I would like to suggest a video on owner checks and removal/installation for the 912/914 gearbox. For example, measurement of gear lash, friction torque, and break away torque. When should these checks be done? Etc
I enjoy the videos...Thanks
Kimbull
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