Prop problem

[jlh3rd]

well, I'm no engineer and no training in metallurgy, so ya'll can have at it, but I do understand metal/mineral/substance hardness ratings.
And common sense. (lol, my opinion)
So a stainless steel prop at the moment of impact will transfer a lot more of that kinetic energy downstream to whatever it is connected to. So whatever force is necessary to bend/break other components has a higher chance of existing.
That plastic/rubber sacrificial hub will still initially transfer that impact energy before spinning.
The initial full impact on that aluminum prop will be dissipated by the tearing/bending of that aluminum.

right?..or wrong.

 

[cyclops222]

Close enough logic.
Best to buy a SUBSURFACE depth map of ALL the areas you would ever drive in. Then you can SEE what is dangerous tothe motor. Plastic covered maps are great if they also show what the shallows are made of. Saved me lots of hits and junk sucked into water pump.

 

[lgaytan]

Finally in the water today, the prop worked great, motor also in good shape considering this is an old outboard cruising no issues, 29 MPH top speed right now although I see carbs are not getting to wot I need to check the linkage and cables, it is missing like 1/8 of turn, maybe less I'm happy as it is. The small tach I brought got wet and ended working so still I'm blind about RPMs this cheap tach was sold as waterproof the seal around the battery is junk, don't buy it!