Insuring JGM: cover and premium
motor yachts · several countries
JGM builds motor yachts in several countries. NAMMERT insures a JGM regardless of year built or where you bought it, liability, hull, legal expenses and personal accident cover from one house, taken out online in five minutes.
At a glance
Origin
several countries
Class
motor yachts
Typical sizes
Premium from
from €49 a year for liability
Worth knowing
JGM; cover, cost and conditions
Four Madeira ranges and the Onze Silhoutte as a sailing boat come from the years 1970 to 1985. With the motor yachts and the motorboat the engine power goes into the premium; with the sailing boat the sail area takes its place. Added to this in each case are the type of boat, the value, the year of construction and the cruising range.
Whether a Madeira 27 still carries its original engine today or a later drive is something we record in the contract. Conversions belong in the list just as much as permanently installed equipment. Theft of parts including the outboard is included in the full hull cover.
The most recent range ended in 1985, so all the boats are used boats today. The year of construction, the place of purchase and previous owners play no role in acceptance; compensation is paid at the agreed value with no deduction for depreciation. The legal expenses cover for water sports can be taken out alongside.
Questions and answers
Frequent questions
How does a new engine affect the contract?
For JGM: The engine power is a premium factor and is recorded in the contract.
Conversions and permanently installed equipment belong in the list so that they are carried by the
agreed value.
Does anything different apply to the Onze Silhoutte than to the Madeira models?
For JGM: With the sailing boat the sail area counts, with the motorboats the engine power.
The type of boat, the value, the year of construction and the cruising range are used in both
cases.
The cover that fits
motor yacht insurance
Tariffs, cover and FAQ for motor yacht insurance in detail.
Third-party liability
The foundation for a boat from JGM: damage to third parties, worldwide,
from €49 a year for liability.
Hull cover
Partial or full hull cover for a JGM, at replacement value with an agreed fixed value.
For the whole class of boat
For JGM: What matters for motor yachts is the same across every brand; engine output,
how a claim is settled, cruising range and theft protection.
The class page lists every point and every brand in this class, JGM included.
Other builders in this class
Nautical information What counts before you cast off, papers, equipment, waters
Licence
A powerboat licence (inland or coastal) is required from 15 hp (11.03 kW).
Registration
Registration from 3 hp; for trips abroad carry the boat certificate or flag document.
Waters
Inland, coastal and abroad; plan fairways, bridge clearances, draught and tides.
Equipment
Lifesaving gear, fire extinguisher, anchor, signalling equipment and correct navigation lights.
Cruising range
The agreed cruising range is stated in the policy and can be extended at any time.
Weather
Check wind force in Beaufort and wind direction before casting off, and allow for gusts.
General guidance, not a complete account;
what governs are the rules of the waters you are on and the manual of your JGM.
Current wind force and direction for your waters are shown on the Home.
Series by JGM, build years and cover
Madeira 27 is a motor yacht from JGM, built from 1970 to 1985.
Madeira 8.3 CC is a motor yacht from JGM, built from 1972 to 1983.
Madeira 17 is a motorboat from JGM, built from 1970 to 1977.
Also a motor yacht, built from 1971 to 1977.
Onze Silhoutte is a sailing boat from JGM, built from 1970 to 1977.
For the Madeira 27, Madeira 8.3 CC,
Madeira 17 by JGM and 2 more series there is no list price left.
That is why we work with an agreed value: you state the figure, we agree it,
and in a total loss exactly that amount is paid, with no deduction for wear.
For the Madeira 27, Madeira 8.3 CC, Madeira 850 by JGM series:
On motor yachts the drive and the electronics together make up about half the value.
Both belong in the valuation, otherwise the sum insured is too low.
For the Madeira 17 by JGM series: On a motorboat the drive is the single most valuable part.
Damage after grounding is covered, an engine failure from wear is not.
For the Onze Silhoutte by JGM series: On boats this size the condition of rig and fittings decides.
A dismasting is covered, worn terminals after years are not.
The JGM range in figures
These figures come from the model records we keep for JGM: boat type, build years and length,
nothing estimated.
- motor yacht
- 3 models, 1970 to 1985, 8.2 to 9 m
- motorboat
- 1 model, 1970 to 1977, 5.4 m
- sailing boat
- 1 model, 1970 to 1977, 5.3 m
Which model was built when?
What does a used JGM cost?
We hold today’s price ranges by year for 3 models by JGM.
The table shows what boats in average condition are worth,
from the oldest to the youngest year on record.
Choose your exact model, year and condition in the calculator.
| Model | Years built | Range today |
|---|---|---|
| Madeira 17 | 1973 to 1974 | €13,500 to €17,200 |
| Madeira 27 | 1973 to 1975 | €11,200 to €14,400 |
| Madeira 8.3 CC | 1975 to 1980 | €13,500 to €18,100 |
Estimate from our boat records, October 2026.
Not a survey.
JGM insured in five minutes.
Boat type, year built, length and value of your JGM are all we need.
Work out the premium online or call us: +49 3375 29 12 77.
