Atco Standard 147cc engine
Osborne
Sun, 03/05/2020
Working on my Atco Standard the engine is now locked, having previously turned over easily. I have not been able to free it it with lubricants and gentle persuasion so have dismantled it.
Can the fan chain sprocket be removed by tapping or does it need a puller? It seems very tight. The bottom end bearing seems rusted so need to get that apart.
I can’t quite understand why it was turning over then locked? Perhaps it is corrosion as I think the fuel tank had some water which had inevitably found its way into the motor.