Selling our beloved sail boat currently harboured at Jachthaven Naarden. We paid the berth to the marina (2400 euros per year). So the boat can stay in Naarden until the 28th of February 2026.

Description:

Boat name: Monster

Model Boomerang/Spoiler 31 (I did not have much information at the beginning, but with the help of kind person, I can now tell you more about the boat. Because, there is quite some information, I made a dedicated section about it at the bottom of the page)

Year: 1978

Dimensions (m): 9.15 x 3 x 1.5 (Length x Width x Depth)

Engine: 2001 Yanmar Diesel engine (motor power 18 PK). Excellent conditions, always been properly winterized and regular check-up.

Two batteries (2019): one to start the motor and another one for the electronic devices in the boat (lamps, radio, etc.)

Exterior Features:

Furling system for headsail

One headsail (Genoa) in good condition (some spot stains present, but no holes or rips)

Mainsail in good condition (some spot stains present, but no holes or rips)

Authentic Teak woodwork (exterior benches, railway, trim around hull)

Spray shield with connecting back-tent in good condition
Recently purchased custom-made covers for headsail and mainsail (purchased 2023 – 800 Eur)

We recently changed the ropes for the mainsail and the headsail

Interior Details:

Wooden interior featuring 5-6 berths (2 shared fore, 1 – 2 shared in lounge, and 2 individual berths aft)

Kitchenette

Insulated interior

Space heater

Electrical outlets present

Toilet present with recently changed pump

Other Features:

VHS Radio

Radio

Accu

Autopilot

Recent Work Done:

Bought a new pump for the water tap of the kitchenette (October 2025)

Sand the teak bordure around the boat and applied water-repellent layers (July 2025)

Last out of water October 2023 – April 2024

Hull fully repainted in April 2024

Antifouling reapplied March 2024

Changed the As (that thing that cost a lot to change)

Propeller cleaned March 2024

Sacrificial anode still in good order as of April 2024

Full interior re-upholstering (2023-2024)

Missing:
Anchor (it got stolen)
Large life-buoy

Future works:

We removed the anti-slip mats on one side of the boat because they were getting old and sliperry. Remove them made the surface much safer to walk on (less sliperry). But it is really that beautiful. We still have enough the anti-slip mats. We leave it for the new owners to decide whether they want the same mats, an anti-slip paints, or any other solutions.

We removed the gas bottle about 2 months ago. It was emtpy. We leave it for the new owners whether they want to have gas on the boat or not.

Information about Boomerang Spoiler 31:

First, I can confirm you for the following reasons that the boat is really a Boomerang Spoiler 31.

Hull shape: The hull has that typical long, slender line with a sharp bow and smooth transition to the stern

Deep keel with a wing-like profile: The keel on one of photo matches the elongated, deep keel commonly found on Boomerang 31s, often with a rounded connection to the hull.

Deck and cockpit layout: The low cabin profile and straight cockpit edges perfectly match the Boomerang 31 design.

Sheer line and freeboard: The gentle sheer (the upward curve of the hull towards the bow) and modest freeboard are characteristic of this type.

What is the Boemerang 31?
Designed by Eric Maizey in Australia, but many boats were built under license in Europe, including in Sweden.
Known for their fast sailing characteristics, great upwind performance, and solid construction.
Built in fiberglass starting in the late 1970s to early 1980s.
Often used for both racing and fast cruising. (Although we only used it for leisure activities, no competition at all).

Don't hesitate to contact us (kudu@live.fr) if you wish to visit our boat !