Materials to choose from / Materialen om van te kiezen
Stainless Steel, Aluminium, X7 alloy, Plastic

So many materials to choose from, which one will suit you and your needs?

Here are the most important features of the avialable materials:


  • Low cost
  • No hurt to the shafts and gears when striking an object underwater
  • Not repairable


  • Low cost, more than plastic, but cheaper than Stainless steel
  • Low chances for damage to the shafts and gears when striking an object underwater
  • Stronger material than plastic
  • Good performance
  • Mostly sold
  • Mostly standard with a new engine
  • Repairable

Stainless Steel

  • More expensive than aluminium
  • A lot more durable, 5 times stronger than aluminium
  • Hold their pitch better under load
  • Thinner blades offer better performance
  • Repairable
  • Much less chances for nicks and dings
  • S/S is a great cathode, so you need good anodic protection, otherwise you will get corrosion on the aluminium drive
  • If you strike a object, the rubber or plastic hub will protect the shafts and gears, however, under certain circumstances of a strike with an object under water, you could have damage on the shafts and gears
  • Because Stainless steel is so much stronger, many different propeller types are avialable, to give you the best performance that is possible.
  • Because stainless steel is much heavier, your engine will have less vibrations
  • Will not always give you better speed and/or accelleration, this depends on the model of the propeller, not only the material, some models give similar speed/accelleration than aluminium, even some less speed/accelleration (very rare).

X7 alloy (only from Mercury)

  • Similar to Stainless Steel
  • 30% stronger than Stainless Steel
  • 4 times more durable than Stainless Steel
  • Allows propeller designs that are impossible with conventional Stainless Steel
  • Exclusive made by Mercury, will fit on many brand engines