For storage I would recommend running the engine dry at low throttle.

Since its not in the model I would flush the regulator with some denatured alcohol, or straight methanol.

Of note any model engine that hit the ground in crash type situation, like nose first, Its a really good idea to replace the crankshaft bearings. They may feel fine but if they get tweaked its only short order before they will fail. Usually a failure like this is messy and can get very expensive. A bearing job is cheap about $30 for the cost of the bearings.

If you are not comfortable with doing it send it to YS Parts and Service. They will check the engine out and can replace the bearings.

Tell them it was in a crash and you want to replace the bearings. Otherwise they can look it over and the bearing will seem fine. Then 20 flights later you could have metal flying through the inside of the engine. Benn there and done that. I now replace the bearings if I have a crash. Plus its good insurance to make sure nothing else got damaged, and there is no dirt or debris inside it.

Troy Newman
Team YS Performance