Even in the simplest form, four-stroke engines offer benefits. The quietness of the motors through the entire speed range is impressive. You see more wildlife as a result, and enjoy a better outdoor experience. The second most noticeable fact is the lack of oil smoke, even after trolling for hours at idle speed. This is a bonus for those who get seasick, as the oil smell can turn a touchy stomach.
Fuel efficiency is a big plus for most anglers.
This in turn reduces fuel capacity needs. Outboard makers have claimed different percentages of fuel savings. That oil would have otherwise been poured straight into the Daly River, through the engine, along with all the other boats. With 40 boats in a comp, that would have been 240L of oil going into the river. Trading up to a 90hp four-stroke engine, Rick said he fished the same tournament under similar conditions, consuming only 225L for the same amount of work.