201 documented fitments · 18 hp · 3600 rpm
Propeller for the Yanmar 2GM20.
We've documented 201 propeller installations behind this engine — the ratios, drives and sizes below are what the fleet actually runs.
Rated power
18 hp
Max RPM
3600
Common ratios
2.62:1 · 2.21:1 · 2.64:1 · 3.22:1
Drive split
148 shaft · 53 saildrive
Documented propeller families
The fleet
Boats we've propped with the 2GM20
- Dehler 34×12
- Hunter Channel 31×6
- Catana 381×5
- Elan 333×5
- Dehler 31×4
- Jeanneau Sundream×4
- Beneteau 311×3
- Elan 295×3
- Hunter 323×3
- Hunter Horizon 30×3
- Hunter Legend 306×3
- Hunter Legend 326×3
- Beneteau 27.7×2
- Beneteau Blue II Catamaran×2
2GM20 propeller questions
What size propeller suits a Yanmar 2GM20?
It depends on the gearbox ratio behind it (documented installations most often run 2.62:1, 2.21:1, 2.64:1) and the boat it pushes. Power and max RPM set the optimum diameter; the ratio converts engine speed to shaft speed. The Builder runs the numbers and an engineer verifies.
Which propeller family do Yanmar 2GM20 owners fit?
Documented Yanmar 2GM20 installations run Varifold 2-blade, Autoprop H5, Autoprop H20 — the split follows boat type and usage rather than the engine itself.
Does the Yanmar 2GM20 come in shaft and saildrive versions?
Both are documented: 148 shaft and 53 saildrive installations. The propeller differs (hub vs spline fitting) so tell us which yours is.
Running a Yanmar 2GM20?
Two minutes in the Builder — engine pre-filled, gearbox ratio checked against the fleet, verified by an engineer within one business day.