Mariner 3400

Mariner 3400 “IN LIEU” – Turn-Key Flybridge Cruiser | REDUCED | Motivated Seller!

Exclusively listed with DBY Boat Sales, this outstanding Mariner 3400 represents exceptional value in today’s market. Presented in immaculate, turn-key condition, “IN LIEU” is one of the finest examples of this highly respected model.

At the heart of this vessel are twin 260HP Mercruiser V8 petrol engines, which received a complete professional rebuild in late 2021 by Newport Marine Services. Since then, the boat has been barely used, showing less than 10 hours of runtime. All invoices are available and tell the story of a no-expense-spared overhaul.  Anti-fouled June 2025.
A 2023 survey report confirms her excellent condition — giving total confidence to the next owner.

Built by Mariner Boats Australia (1986), the 3400 is renowned for its solid construction, generous beam (3.79m), predictable handling, and offshore capability. She cruises comfortably at 20+ knots, delivering a smooth, stable and responsive ride.

Light, Space & Entertaining

One of the standout features is the full-width sliding glass rear doors, which disappear neatly behind the flybridge ladder. This creates a seamless flow between cockpit and saloon, flooding the interior with natural light and making the boat feel remarkably spacious.

The modular cockpit furniture includes a two-seat aft sofa, creating an ideal entertaining area for family and friends.

Comfort for Extended Cruising

The interior offers true cruising comfort with:

• Two private cabins
  • Forward cabin with large queen bed
  • Guest cabin with two oversized single bunks
• Convertible saloon seating – sleeps up to six
• Separate enclosed shower in the head
• Midships galley with brand-new ENO gas stove
• Bright, airy saloon with large dinette to port

Well Equipped

• Quality bimini top
• Cockpit shade canvas
• Windscreen shade cloth
• Excellent overall presentation inside and out

This is a rare opportunity to secure a fully sorted Mariner 3400 with fresh mechanicals and outstanding accommodation.
“IN LIEU” is ready to go and will not disappoint.

Date of Last Antifoul: June 2025

For sale with DBY Boat Sales Pittwater Office in Newport. Please call +61 2 9999 3311 for an inspection. For additional high-resolution photos and detailed inventory, please email sales@dbyboatsales.com.au