12-04-2014, 10:11 AM
1.66 MPG is only achievable by the Volvo Diesel 29 Coronet. I only know of a few that were ever built with this option. I do remember one being repowered with Yanmar Diesels, but I do not remember the performance.
Diesels run best at 80 - 85% Load and they are designed to do so. Gas engines work best at about 60 - 70% load. That's engine loading, not percentage of throttle. The best speed to run a vessel is where the MPG is the best running on plane. This is the most efficient spot. Keep in mind that sea-conditions can dictate your cruising speed. Obviously if the most efficient speed has you holding on for dear life, slow down!
The 6.0L Coronets (2005/2006) had a best of 1.26 MPG @ 24 Knots (1.25 MPG @ 26 Knots)
The 8.1L Coronets (2003/2006) had a best of 1.14 MPG @ 26 Knots
Diesels run best at 80 - 85% Load and they are designed to do so. Gas engines work best at about 60 - 70% load. That's engine loading, not percentage of throttle. The best speed to run a vessel is where the MPG is the best running on plane. This is the most efficient spot. Keep in mind that sea-conditions can dictate your cruising speed. Obviously if the most efficient speed has you holding on for dear life, slow down!
The 6.0L Coronets (2005/2006) had a best of 1.26 MPG @ 24 Knots (1.25 MPG @ 26 Knots)
The 8.1L Coronets (2003/2006) had a best of 1.14 MPG @ 26 Knots
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