Restarting piston engine after a long AOG
Hello colleagues, I'm after some collective wisdom. I need to bring several piston engines back into operation after a year or more AOG without proper preservation. I see the process as follows:
1. remove the spark plugs,
2. spray some oil into cylinders,
3. preheat the engine well above room temperature,
4. drain the old oil, if any,
5. replace the filter, inspect the old one,
6. fill with new 80W oil (also preheated to e.g. 80°C),
7. crank the engine a few turns by hand,
8. check the crankshaft for smooth rotation (if not, tough luck),
9. crank the engine with a starter, check for normal cranking speed and at least some oil pressure,
10. if no oil pressure, check for oil flow out of pressure gauge union,
11. if no flow, check if the engine oil pump is properly primed,
12. if not, prime manually, check again,
13. if OK, check cylinder compression,
14. if the results are sensible, attempt a restart.
Is this reasonable? Any additions, corrections or helpful tricks will be greatly appreciated.