I used to subcontract for the USCG and at one time was responsible for about 3500 engines. Basically if one of those engines had a major (power head, cylinder heads, motor mounts) failure they would box it up and ship it to me. At one time one of the higher ups gave me some numbers...
During my time there they used to use Mercury Optimax, most would last about 1800 hours, maybe 3500 if it was a good one.
The Honda 4 strokes would but 12000-13000 hours before replacing them and sending the still running motors to auction.
The Hondas had a 1.8% down time, the Yamaha 4 strokes were 3.5%, and mercury optimax were 18%. This was 2002 or 2003 models.
Here are only a few of the dead ones at one USCG station getting replaced with new Hondas
During my time there they used to use Mercury Optimax, most would last about 1800 hours, maybe 3500 if it was a good one.
The Honda 4 strokes would but 12000-13000 hours before replacing them and sending the still running motors to auction.
The Hondas had a 1.8% down time, the Yamaha 4 strokes were 3.5%, and mercury optimax were 18%. This was 2002 or 2003 models.
Here are only a few of the dead ones at one USCG station getting replaced with new Hondas
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