I don't know now. I would stack a 150/175 carbed looper up against any YAMAHA or MERC for longevity and reliability. It may not be able to pass a fuel dock without stopping, but with minimal maintenance them engines have been known to run well past 5000 hours trouble free.
Disconnect the auto-oiler and run REAL GAS w/no alkeehol and I bet she'd run for a long time...