A structured, professional-grade pre-survey inspection guide for the Jeanneau Sun Odyssey 49, 49i, and 509 — three of Jeanneau’s most desirable performance cruisers in the 50-foot class. Although they share a family lineage, each model has its own construction details, structural nuances, and common age-related issues that buyers must understand before committing.

This guide provides a step-by-step method to assess hull structure, deck core condition, chainplates and rig support, rudder and steering systems, tank installations, electrical layouts, and mechanical health. It is designed to help you evaluate boats with mixed charter histories, owner upgrades, or incomplete maintenance documentation.

Whether you're inspecting the yacht in person or reviewing a remote media package from abroad, this guide helps you eliminate weak candidates early, recognize high-quality examples, and negotiate from a position of clarity and confidence.

This document is informational only and does not replace a professional marine survey.

Included:

• Full model overviews (49 / 49i / 509)

• Known structural & mechanical weak points for each variant

• Red flags (walk-away signs)

• Positive signs (green flags)

• What to ask the seller

• Pre-survey photo checklist

• Sea trial checklist

• Negotiation leverage points

• Model-specific expert advice

• Guide length: 48 pages

Format: PDF digital download (instant access).

For: Buyers, remote buyers, refitters, and long-range cruisers evaluating Jeanneau’s 49–50 ft class performance cruisers.