I have a Furuno 1715. It will turn on but it just shows a black circle. It show it at different ranges and in and out of port. Is there a setting or something I should be doing?
Hi I am planning a trip from Sheboygan WI. to Marinette WI. The trip is around 120 miles give or take and I want to get the best gas milage. I have a 1987 270 Searay Sundancer with twin 5.7's. I am new with boats that have twin engines. When I go should I run both engines or only one?
