Not so! I own my second Skymaster. It is a P337G, 1975. I just got the front engine rebuilt at 2500 hours. The rear engine now has almost 2600 hours. I intend to get that engine rebuilt this summer. My engines on my first Skymaster which was a 1971 F model had 2200 hours on them before rebuild. I fly a lot and I think that is one of the reason why I get good times on the engines. Miracle..no! Others have experenced the same thing.
Point of fact. The TSIO-360 CB engines in my P337G plane is the same engine used in the Seneca V plane. In the Skymaster the TBO is 1400 hours. In the Seneca it is 2000 hours. Make any sense?
Jerry
N34EC