The fitment database
We've probably already propped your boat.
11,353+ documented fitments across 4,485 boat models — every one with the engine, gearbox and propeller that actually worked. Search yours.
Browse by builder
Brand libraries
Brands with enough documented fitments get a full library — every model page shows engines, ratios, drives and sizes from real installations.
- Amel7 models documented476
- Bavaria19 models documented532
- Beneteau56 models documented948
- Broadblue3 models documented54
- Catalina11 models documented188
- Catana3 models documented50
- CNB5 models documented145
- Dehler7 models documented107
- Dufour16 models documented296
- Elan5 models documented88
- Etap3 models documented57
- Fisher4 models documented64
- Fountaine Pajot11 models documented197
- Grand Soleil6 models documented77
- Hallberg-Rassy6 models documented142
- Hanse9 models documented241
- Hunter11 models documented209
- Island Packet5 models documented59
- Jeanneau44 models documented802
- Lagoon15 models documented250
- Leopard8 models documented263
- Malö5 models documented46
- Maxi3 models documented49
- Moody22 models documented321
- Najad4 models documented83
- Nauticat3 models documented39
- Oyster14 models documented347
- Rival4 models documented43
- Sadler6 models documented51
- Sigma4 models documented77
- Solaris4 models documented70
- Southerly3 models documented66
- Swan8 models documented156
- Westerly8 models documented177
Collection
Catamarans — 1,694 fitments
Lagoon, Leopard, Fountaine Pajot, Seawind and the rest of the multihull fleet: twin-engine sizing, saildrive fits and handed pairs, documented.
Open the catamaran library →Not listed?
Every boat can be sized.
The database powers the shortcuts, not the limits. One-offs, classics, steel cruisers, new builds — the Builder takes your engine and gearbox numbers and the engineers do the rest.
Start the BuilderProof at scale
The fitment record, plotted
Every bar is documented installations — the database this whole site runs on.
Documented fitments by builder — top 15
Measured| Name | Documented fitments |
|---|---|
| Beneteau | 948 |
| Jeanneau | 802 |
| Bavaria | 532 |
| Amel | 476 |
| Oyster | 347 |
| Moody | 321 |
| Dufour | 296 |
| Leopard | 263 |
| Lagoon | 250 |
| Hanse | 241 |
| Hunter | 209 |
| Fountaine Pajot | 197 |
| Catalina | 188 |
| Westerly | 177 |
| Swan | 156 |
Documented across 11,353 fitments for builders including Beneteau, Jeanneau, Bavaria, Amel, Oyster, Moody, Dufour, Leopard, Lagoon, Hanse, Hunter, Fountaine Pajot, Catalina, Westerly — and tested by Yachting Monthly, Voile Magazine, Seil and Vela e Motore.
Get the verified recommendation for your boat
Tell us your boat, engine and how you use it — a propeller engineer replies within one business day with sizing checked against the fitment database.