Re: stern heavy
It may be. The Black Max was a motor name given to some of the Merc V-6s.
The Black Max propeller is an aluminum prop designed for aft heavy apps like stern-drives, good chance that one came with that 150. It is a classic blade that offers unmatched stern lift in a 3 blade. It has very little rake and cupping and is easy to turn.
Quicksilver's equivalent prop is called Black Diamond. My understanding is that the prop used to be available in stainless...
I believe Propco still makes them in stainless and PowerTechs MQF and MQS (MQS for your motor) series are also the same shape with slightly different pitches.
The Black Max is everywhere for around $100 -130. Chances are that your other prop is just that. Swap em out and see but be careful that you don't over rev as the prop on the 150 likely has a lower pitch than the Laser II but if its a 19 pitch and compatible, try it out. And definitely get a trim anode on there. Good luck.
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