My thoughts about 'high' outboard hour usage
With twin engines you can compare engine noise while running. If the sound changes between the two motors it may be an indicator of an issue. I'm at 2600 hours on my Honda 150's, and they still both 'purrrrr'
With twin engines I find myself using lower RPM's for the same cruising speed which should equate to increased engine longevity. With my single engine 26' cat boat I was averaging 4400 rpm for cruising. With my Tomcat and Honda 150's I'm averaging 3200 RPM for the same cruising speed. The lower RPM's could help the engines closer approach Honda car engines 250,000 mile service life.
Another thing to keep an eye on is fuel burn. At 2600 hours my engines are using identical fuel burn rates. When I see a difference I plan to have them both checked out
With twin engines you can compare engine noise while running. If the sound changes between the two motors it may be an indicator of an issue. I'm at 2600 hours on my Honda 150's, and they still both 'purrrrr'
With twin engines I find myself using lower RPM's for the same cruising speed which should equate to increased engine longevity. With my single engine 26' cat boat I was averaging 4400 rpm for cruising. With my Tomcat and Honda 150's I'm averaging 3200 RPM for the same cruising speed. The lower RPM's could help the engines closer approach Honda car engines 250,000 mile service life.
Another thing to keep an eye on is fuel burn. At 2600 hours my engines are using identical fuel burn rates. When I see a difference I plan to have them both checked out