The Jeanneau Merry Fisher 795 Marlin 2019 vs Jeanneau Sun Odyssey 509 2011 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.

Size is the most obvious dividing line here. The Jeanneau Sun Odyssey 509 2011 measures 50,6 feet overall (2011), giving it roughly 27,0 additional feet of deck space compared to the Jeanneau Merry Fisher 795 Marlin 2019 at 23,6 feet (2019). Weight tells a clearer story for trailering families: the Jeanneau Sun Odyssey 509 2011 tips the scales at 30 644 lbs — 26 786 lbs less than the Jeanneau Merry Fisher 795 Marlin 2019 at 3 858 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

The power gap is worth calling out. Rated to 200 hp, the Jeanneau Merry Fisher 795 Marlin 2019 has a 125-hp advantage over the Jeanneau Sun Odyssey 509 2011's 75-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Jeanneau Sun Odyssey 509 2011 carries 63 gallons versus 53 gallons in the Jeanneau Merry Fisher 795 Marlin 2019. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Jeanneau Sun Odyssey 509 2011 is rated for 15 passengers, while the Jeanneau Merry Fisher 795 Marlin 2019 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Jeanneau Sun Odyssey 509 2011 could be the deciding factor.

Displacement is where these two sailboats genuinely part ways. The Jeanneau Sun Odyssey 509 2011 displaces 30 644 lbs — a 26 786-lb difference over the Jeanneau Merry Fisher 795 Marlin 2019 at 3 858 lbs. That gap separates two entirely different categories of sailing: the heavier boat is built for offshore passage-making and load-carrying, while the lighter hull rewards performance sailing and easier handling in lighter air.

Draft is a practical consideration that many buyers underestimate until they're already at the marina. The Jeanneau Sun Odyssey 509 2011 draws 7,6 ft, compared to 1,8 ft for the Jeanneau Merry Fisher 795 Marlin 2019. That 5,8-foot difference affects which anchorages you can access, which haul-out facilities will take you, and how carefully you need to read the tide tables in shallower cruising grounds.

For auxiliary power the Jeanneau Merry Fisher 795 Marlin 2019 carries a 200-hp engine against 75 hp on the Jeanneau Sun Odyssey 509 2011. Motoring range and ability to punch through a foul current or enter a tight marina under power will favour the more powerful installation.

For extended cruising, water capacity matters: the Jeanneau Sun Odyssey 509 2011 carries 163 gallons versus 26 gallons on the Jeanneau Merry Fisher 795 Marlin 2019 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.