Moody Yachts 31 Mk  Fin/Twin keel 1983 boat specs
Moody Yachts
Moody Yachts 31 Mk Fin/Twin keel 1983
1983
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Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 boat specs
Moody Yachts
Moody Yachts Decksaloon 45 Deep/Shoal draft 2008
2008
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Moody Yachts 31 Mk Fin/Twin keel 1983 vs Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 — Same Brand, Different Boat

The Moody Yachts 31 Mk Fin/Twin keel 1983 vs Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 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 Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 measures 45,0 feet overall (2008), giving it roughly 14,3 additional feet of deck space compared to the Moody Yachts 31 Mk Fin/Twin keel 1983 at 30,8 feet (1983). Weight tells a clearer story for trailering families: the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 tips the scales at 30 865 lbs — 20 899 lbs less than the Moody Yachts 31 Mk Fin/Twin keel 1983 at 9 966 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 107 hp, the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 has a 79-hp advantage over the Moody Yachts 31 Mk Fin/Twin keel 1983's 28-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 carries 169 gallons versus 24 gallons in the Moody Yachts 31 Mk Fin/Twin keel 1983. 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 Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 is rated for 13 passengers, while the Moody Yachts 31 Mk Fin/Twin keel 1983 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 could be the deciding factor.

Displacement is where these two sailboats genuinely part ways. The Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 displaces 30 865 lbs — a 20 899-lb difference over the Moody Yachts 31 Mk Fin/Twin keel 1983 at 9 966 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 Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 draws 6,6 ft, compared to 5,0 ft for the Moody Yachts 31 Mk Fin/Twin keel 1983. That 1,6-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.

The Moody Yachts 31 Mk Fin/Twin keel 1983 uses Sloop rigging. Helm style differs too: the Moody Yachts 31 Mk Fin/Twin keel 1983 uses a Tiller versus a Twin helm wheels on the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008. Wheel helms give better leverage and visibility on larger boats; tillers offer direct feedback and simplicity on smaller ones. For auxiliary power the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 carries a 107-hp engine against 28 hp on the Moody Yachts 31 Mk Fin/Twin keel 1983. Motoring range and ability to punch through a foul current or enter a tight marina under power will favour the more powerful installation.

Hull speed is rated at 8,7 knots for the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 and 6,8 knots for the Moody Yachts 31 Mk Fin/Twin keel 1983. For extended cruising, water capacity matters: the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 carries 211 gallons versus 36 gallons on the Moody Yachts 31 Mk Fin/Twin keel 1983 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.

Bottom line: The Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 is the offshore and bluewater choice — at 30 865 lbs displacement and 45 ft it has the load capacity, range, and seakeeping for extended passages. The Moody Yachts 31 Mk Fin/Twin keel 1983 at 9 966 lbs is the more nimble, accessible option — easier to single-hand and better suited to coastal and inland sailing.
Measurements / Dimensions
Length overall - Detail30.75 ft
Length overall - Detail45.00 ft
Length - Feet30.75
Length - Feet45
Length overall - Meters9.37
Length overall - Meters13.72
Length overall - Inches369
Length overall - Inches540
Beam10.50 ft
Beam15.00 ft
Beam - Meters3.2
Beam - Meters4.57
Beam - Inches126
Beam - Inches180
Draft [max] - Detail5.00 ft
Draft [max] - Detail6.60 ft
Draft [max] - Meters1.52
Draft [max] - Meters2.01
Draft [max] - Inches60
Draft [max] - Inches79
Displacement9966.00 lbs
Displacement30865.00 lbs
Body / Hull
HelmTiller
HelmTwin helm wheels
Ruddernot available
RudderSingle spade rudder
Engine and Drivetrain
Fuel tank capacity - Gal24
Fuel tank capacity - Gal169.1
Fuel tank capacity - Liters90.85
Fuel tank capacity - Liters640.11
Horsepower28 hp
Horsepower107 hp
Fuel typeDiesel
Fuel typeDiesel
Drive typeinboard
Drive typeinboard
Performance
Maximum speed6.76
Maximum speed8.73
Maximum speed measureknots
Maximum speed measureknots
Operational Info
Sleeping capacity4
Sleeping capacity4
Cabins2
Cabins2
Head1
Head2
Water capacity35.9
Water capacity211.3
RiggingSloop
RiggingSloop
Mast ConfigurationDeck stepped mast
Mast ConfigurationDeck stepped mast
Boat typeSail
Boat typeSail
Holding tank capacity - Galnot available
Holding tank capacity - Gal26.4
Holding tank capacity - Litersnot available
Holding tank capacity - Liters99.93

Moody Yachts 31 Mk Fin/Twin keel 1983 vs Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 — Common Questions

Which is the larger boat — the Moody Yachts 31 Mk Fin/Twin keel 1983 or the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008?
The Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 is the longer of the two at 45,0 feet overall. The Moody Yachts 31 Mk Fin/Twin keel 1983 comes in at 30,8 feet, making it roughly 14,3 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Moody Yachts 31 Mk Fin/Twin keel 1983 or the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008?
For trailering, the Moody Yachts 31 Mk Fin/Twin keel 1983 has the edge at 9 966 lbs dry weight versus 30 865 lbs for the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008. Add a motor (typically 300–500 lbs for an outboard in this class), gear, and a partial fuel load and the difference grows. Lighter is friendlier on smaller tow vehicles and on fuel economy while hauling.
Which boat can handle a bigger outboard?
The Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 is rated to a maximum of 107 hp, giving it the larger power ceiling. The Moody Yachts 31 Mk Fin/Twin keel 1983 tops out at 28 hp. Keep in mind that maximum ratings are just that — matching the motor to the actual load and usage pattern usually matters more than chasing the ceiling.
How many people can each boat hold?
The Moody Yachts 31 Mk Fin/Twin keel 1983 is Coast Guard rated for 9 passengers, while the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 is certified for 13. Note that legal capacity and comfortable capacity aren't always the same thing — on a full day out, most experienced boaters aim for about 80% of the rated number to keep things comfortable.
Which boat has the deeper draft — the Moody Yachts 31 Mk Fin/Twin keel 1983 or the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008?
The Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 has the deeper draft at 6,6 ft, versus 5,0 ft for the Moody Yachts 31 Mk Fin/Twin keel 1983. A deeper draft generally means better upwind performance and stability, but limits access to shallow anchorages and some marina berths. Always check the controlling depth of your home port and favourite cruising grounds before committing.
Is the Moody Yachts 31 Mk Fin/Twin keel 1983 or the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 better suited for offshore sailing?
For offshore work, displacement and construction are the primary indicators. The Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 at 30 865 lbs displacement is the heavier, more load-carrying design — generally better suited to extended passages where seakeeping and provisioning capacity matter most. The Moody Yachts 31 Mk Fin/Twin keel 1983 at 9 966 lbs will typically be livelier and more responsive in lighter conditions.
Which is the faster sailboat — the Moody Yachts 31 Mk Fin/Twin keel 1983 or the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008?
Based on rated hull speed, the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 has an edge at 8,7 knots versus 6,8 knots for the Moody Yachts 31 Mk Fin/Twin keel 1983. Keep in mind that actual sailing speed depends heavily on wind conditions, sail trim, bottom condition, and skipper experience — hull speed is a theoretical maximum, not a guarantee.
Which boat is better equipped for long-distance cruising?
For extended passages, fresh water capacity is a key indicator of cruising readiness. The Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 carries 211 gallons of fresh water compared to 36 gallons on the Moody Yachts 31 Mk Fin/Twin keel 1983 — a meaningful advantage when watermaker installations or port stops aren't guaranteed.
Which boat is wider, and does it affect trailering?
The Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 measures 180" wide, compared to 126" for the Moody Yachts 31 Mk Fin/Twin keel 1983. The US standard-width towing limit is 8’6" (102") in most states — anything over that may need a wide-load permit. Confirm your specific route requirements with each state's DOT.
Which boat has the larger fuel tank — the Moody Yachts 31 Mk Fin/Twin keel 1983 or the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008?
The Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 has the bigger tank at 169 gallons, versus 24 gallons on the Moody Yachts 31 Mk Fin/Twin keel 1983. That 145-gallon difference translates to roughly 435–725 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Moody Yachts 31 Mk Fin/Twin keel 1983 and Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 from the same manufacturer?
Yes — both the Moody Yachts 31 Mk Fin/Twin keel 1983 and the Moody Yachts Decksaloon 45 Deep/Shoal draft 2008 are built by Moody Yachts. That means shared dealer networks, common parts availability, and consistent build quality across the line. The choice between them is essentially a question of how much boat you need, not which brand you trust.