Hi

Thanks for the prompt reply. Yes, the engine is still running... but there is little resistance when flipping the propeller when starting the engine.

As the compression is low, it is a little hard to start the engine after the each flight. It has to be left to cool down before the subsequent flight.

The flying field is on an open space of red earth... very dusty under dry and hot day.

The salesman recommended for the piston to be replaced. However, due to the high cost, I refused.... may consider a new one instead ... not another ThunderTiger!

Thanks again.