Originally Posted by Retired
Looking at a 1998 Mainship 390 single cat 3116 engine. What efficency can I get at low speed? Will be doing the loop this year.
By all means sign up for the Yahoo group owner's site.
Bottom line is you'll get 3+ mpg at trawler speeds and that will be inclusive of genny time. For budgeting if you use 3 that will get you in the ballpark. Any better will be a bonus.