Prop problem

[lgaytan]

I don't have documented information but I saw in a youtube video that aluminum props loose 25% of pitch due to deformation, is tha true? If that is like that it seems a big difference in efficiency I guess, but well as explained before I will stick with my old prop just rehubbed, I think it worked good until now, after all being the hub a sacrificial component this seems to be a normal maintenance procedure.

 

[Chris1956]

Not to discredit Utube, but aluminum props do not loose anywhere near 25% of their pitch. That would turn a 21P aluminum prop into a 16P prop.

I have always heard that aluminum props flex a bit under load but have never witnessed it.

 

[tphoyt]

For what it’s worth I think you have made a good decision getting your prop fixed. You can go into a rabbit hole trying to gain an extra bit of speed. Unless your way way off on pitch and your likely not it’s not going to make a big difference unless your trying to win a race. Get one of those cheap tacks that wrap around the plug wire someday and see what your rpms are at wot and go from there if you need to. I can’t remember what those dam tack are called at the moment. Brain fart.

 

[lgaytan]

I have a tinytach in other outboard, I will try it in this one, only downside is that cables are too short so I need help from somebody to see the readings or drive, anyways theres alwas a way to do things.

 

[airshot]

I don't have documented information but I saw in a youtube video that aluminum props loose 25% of pitch due to deformation, is tha true? If that is like that it seems a big difference in efficiency I guess, but well as explained before I will stick with my old prop just rehubbed, I think it worked good until now, after all being the hub a sacrificial component this seems to be a normal maintenance procedure.

If they flexed 25%, the blades would break off.....don't believe anything on youtube...!!