About this tender
The JT 17 is the size in Castoldi's range that we put forward when an owner wants a tender with a clear performance margin over the 16 without stepping into the bigger 18 or 19 footprint. At 5.36m LOA and 2.26m beam, it is sized for tender garages on motoryachts in the 40m to 50m range, with the gull-wing hull profile that distinguishes it from the smaller deep-V monohedric models in the line.
Power is a 170 hp diesel coupled to a Castoldi waterjet, giving 34 knots top speed when light and 32.5 knots fully loaded. The extra horsepower over the JT 16's 110 hp Yanmar makes a real difference in mixed conditions and with a full guest load, which is why we tend to recommend the upgrade when the garage envelope allows. Nine-passenger Cat C certification covers most working tender groups.
Highlights
The four details we'd point out first to a captain who hasn't seen one on the water yet.
The JT 17 uses a hard-chine gull-wing hull rather than the deep-V monohedric form on the smaller models in the range. The gull-wing geometry adds dynamic stability at low speed and gives a slightly drier ride in chop. The 0.43m diameter inflatable tube is also larger than the 16, contributing to the additional working freeboard.
The 170 hp diesel waterjet driveline gives meaningful performance over the JT 16's 110 hp setup, both in pickup with a full load and in top speed reserve. 34 knots light, 32.5 knots fully loaded; the difference between the two figures is small, which speaks to the hull and driveline being well-matched to the design weight.
At 5.36m LOA and 2.26m beam, the JT 17 fits the standard tender envelope on most 40m to 50m motoryachts. For owners moving up from a smaller tender on a previous yacht, this is often the right step-up size. Confirm against the lift specification before committing on a specific hull.
Same Italian factory build standard as the rest of the Castoldi range, with Yanmar diesel parts and service available globally. For owners on multi-year cruising programmes the support network is the deciding factor over comparable smaller-yard alternatives.
Gallery
The full specification
Specifications, prices, availability, and performance figures are supplied for guidance only and remain subject to confirmation by the yard, seller, broker, survey, contract, and final specification.
Questions, answered
Last call · Available
Castoldi · Albairate, Italy
Tell us about your yacht, your programme, and the missions 17 needs to handle. We come back within 48 hours with a written assessment - fit for the brief, lead time, and trade-offs against alternatives in the same band.
Prefer to talk? +44 (0) 77180 88055 · other ways to reach us
From the library
