Rob, It seems you have concern about the lack of hours on the engine since it was rebuilt. This could be justified but an inspection by a good mechanic could help you decide. I took a gamble on my plane when the engine had only 670 hours in 18 years. 2.2 hours in the last 3 years as it sat outside. Ended up replacing one cylinder, all the hoses, baffles, and a muffler due to age. Running good and compressions very good. Without a good 3rd party inspection you will not know and the issues found may not even be engine related.
