This Polastorm Stella duplex stainless steel propeller for 25–70 hp outboard motors is a 3-blade propeller with a diameter of 11 1/2″ and a pitch of 13″. The size is therefore indicated as 11 1/2 x 13″, where the first measurement is the propeller diameter and the second is the pitch.
The propeller is manufactured from ASTM A890 Grade 4A duplex stainless steel using APC precision casting. The material is solution heat-treated and combines high mechanical strength with corrosion resistance. The general mechanical data for the material grade are 680 MPa tensile strength, 450 MPa yield strength, 25% elongation, and 26 HRC hardness.
The Stella series uses an interchangeable hub system and a helical through-hub exhaust. The propeller is supplied without a central hub and shock-absorbing hub insert, so an engine-specific hub kit must be selected and ordered separately.
The propeller family is intended for outboard motors in the 25–70 hp power range with a 3 1/4″ gearcase and is recommended for Suzuki, Yamaha, and Selva. Final compatibility depends on the specific engine, gearcase diameter, propeller shaft, and number of splines.
The separate hub kit is made of brass and rubber and includes a hub insert with shock and shear protection, a thrust washer, a front spacer, and a nut. Check the engine specifications before selecting the hub kit.
The Stella profile can be compared to the Solas New Saturn and Solas Rubex NS3. The comparison refers to the propeller profile and is not documentation of a specific part number or universal interchangeability.
Always check the engine model, gearcase, propeller shaft, spline count, diameter, pitch, and correct hub kit before purchasing.
Key features3-blade Stella propeller for outboard motors
Diameter and pitch: 11 1/2 x 13″
For the 25–70 hp engine category
For 3 1/4″ gearcase
ASTM A890 Grade 4A duplex stainless steel
APC precision-cast and solution heat-treated
Interchangeable hub system with through-hub exhaust
Hub kit not included
Recommended for Suzuki, Yamaha, and Selva
