What is the farthest anyone has taken their trawler?

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"1 gallon per hour per 20 horsepower."

Perhaps a bit optomistic with such an old design and light loads , 16-18 may be closer.

You'll have to take that up with Dick. He's only been in the marine diesel business for some 45 years so probably doesn't know what he's talking about.
 
Big Duck's week on Lake Powell:
171 water miles,
82 engine gallons,
40 generator gallons,
30 engine hours,
7 days 6 nights on the water,
0 days at marinas.
 

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John Deere says my 4045 engine consumes 4.5 gallons to generate 80 horsepower. That equals 17.8 horsepower per gallon.
 
Instead of guessing one method to have a better idea might be a tow rope and a scale to find the drag at a variety of speeds.

Everybody has a pal with a bigger boat.

It is simply amazing how little effort is required to move at SL of 1

Most impressive tow job I have been aboard for was in Key West.

Daddy lobster boat captain (40+ft) shifted into reverse to quickly (no shaft brake) and spun off the prop.

His kid came out ,(identical boat) hooked up and towed us back to port

ON THE PLANE!
 
Marin,
What your Northern Lights friend said may not reflect what he knows or what reality is. He usually deals w very modern stuff and may not have made the effort to adjust his conversation to your old engines. So not to hijack this thread about distance any further I've started a new thread "Gallons per hp hour".
 

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