Cracked Mazco

[LakeFever]

I had a cracked chopper I was going to weld up but there are major challenges to welding a stainless prop. Welding stainless requires shielding gas on both sides of the weld of you get sugaring which is porous and not good at all. Then you have the filler to consider which ought to be a perfect alloy match and it’s hard to know what these props are made from so using 309 ( the stick to anything stainless filler ) is a good choice for unknown alloys but props are critical and having strength variations in the most stressed area of the blade is certainly a risk. Then as mentioned haz and warp from heat and possible hub damage if it’s a rubber hub. Balance etc etc lots of things piling on here working against success.


If if I have things like this? Used or damaged parts that might do the job but might not? I get rid of them so I don’t get tempted to use them. Once their gone, so is their risky potential


but if you had all surfaces 100% shielded and the correct filler and a steam ticketed super pro level welder do the job, then x Ray the welds, then have a prop man balance and set it? It will be as good as a new one for three times the price lol

[lbhsbz]

Can't tell you who I heard it from cuz I forgot...but a reputable source...after Kevin's passing, R&R is shutting down or has shut down and sold the Mazco business to someone else...dunno who.

I have an easy enough time cracking props that haven't been repaired...every one I've had repaired has cracked again on the next outing. I'm done fixing 'em.

[Euroski]

I had a merc ET with a smaller crack than your photo, send out to knowlegable shop... made one run and cracked again!

[STV_Keith]

Can't tell you who I heard it from cuz I forgot...but a reputable source...after Kevin's passing, R&R is shutting down or has shut down and sold the Mazco business to someone else...dunno who.

From the R&R FB page:

Due to the death of Kevin Taylor and the retirement age of our mechanics, R & R Prop Shop will be closing on July 31, 2019. Your patronage these past 25 years is very much appreciated and hope you all continue to enjoy boating.
If you are a Mazco propeller customer, their new number is 601-620-7206.

[LakeFever]

The crack happens in the most stressed out place of the prop so the repaired crack is immediately going to be the most stressed out area after the repair. I'm starting to look at props like guitars, there are many similar but no two exactly alike! Like a good wife, find a good prop and hold onto it, treat it real good, get it something nice at the flea market like a mood ring or somethin.

[XstreamVking]

Prop guy told me when a prop cracks it usually indicates there was a flaw in the casting. So, a cracked prop is one that is flawed from the beginning. Surfacing props flex a lot and a structural flaw will show when flexed repeatedly. You can also thin the blade to where it has a cycle life. Then it's a matter of time.

[JERALD]

Decent, need to accomplish something like this with mine.