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Old 11-07-2011, 18:27   #1
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Marine Tex in Pitted Max-Prop ?

Hello,

About 1,200 hours ago, I filled pits in my Max-Prop blades with Marine-tex putty. I was surprised to find at a recent haul out that the epoxy held fine on two of the blades, but had come out of the trailing edge of one blade.

Has anyone else tried this? What are others' experiences?

Thanks.
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Old 11-07-2011, 18:36   #2
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Re: Marine Tex in Pitted Max-Prop ?

wow. I would never have guessed that this would work.

Marine-tex. Never leave port without it!
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Old 11-07-2011, 21:15   #3
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Re: Marine Tex in Pitted Max-Prop ?

It's amazing how well epoxy works. I would have tried JB Weld instead of MarineTex on a prop though...

ciao!
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Old 11-07-2011, 22:26   #4
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Re: Marine Tex in Pitted Max-Prop ?

Rescue Tape. For Those Who Know.
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Old 11-07-2011, 22:34   #5
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Re: Marine Tex in Pitted Max-Prop ?

I have made some amazing repairs with Marine Tex so your experience with the prop doesn't surprise me.

Like Bash says, don't leave home without it. My only complaint, the stuff ain't cheap.
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Old 11-07-2011, 22:35   #6
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Re: Marine Tex in Pitted Max-Prop ?

Quote:
Originally Posted by svdate View Post
Hello,

About 1,200 hours ago, I filled pits in my Max-Prop blades with Marine-tex putty. I was surprised to find at a recent haul out that the epoxy held fine on two of the blades, but had come out of the trailing edge of one blade.

Has anyone else tried this? What are others' experiences?

Thanks.
Sounds interesting! What waters are you in, how was the growth on the prop?
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Old 11-07-2011, 22:45   #7
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Re: Marine Tex in Pitted Max-Prop ?

If paint sticks to props, why shouldn't martex?
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Old 12-07-2011, 09:00   #8
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Re: Marine Tex in Pitted Max-Prop ?

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Originally Posted by tager View Post
If paint sticks to props, why shouldn't martex?
Paint usually doesn't!

One possible reason for the differences between the blades is that the missing bit were in an area suffering from cavitation, whilst the others were not.

And, for someone who mostly isn't in the states, what exactly is JBweld? I see frequent favorable reviews of it, so I'm curious.

Thanks and cheers,

Jim
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Old 12-07-2011, 09:20   #9
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Re: Marine Tex in Pitted Max-Prop ?

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Paint usually doesn't!

One possible reason for the differences between the blades is that the missing bit were in an area suffering from cavitation, whilst the others were not.

And, for someone who mostly isn't in the states, what exactly is JBweld? I see frequent favorable reviews of it, so I'm curious.

Thanks and cheers,

Jim
JB Weld is a two part epoxy that, as you might guess from the name, is promoted for metal repair when welding is not available, too expensive or not an option for some reason.

Supposed to do a very good job and probably quite similar to Marinetex but do not have the personal experience with JB Weld to give it a first hand report.
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Old 12-07-2011, 09:22   #10
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Wouldn,t that make a maxprop unbalanced ? I have to think the difference in wght between the metal that was there and the epoxy is significant.
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Old 12-07-2011, 09:24   #11
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Re: Marine Tex in Pitted Max-Prop ?

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Would,t that make a maxprop unbalanced ? I have to think the difference in wght between the metal that was there and the epoxy is significant.
The OP described the problem as pitting on the blade. Unless he has giant pits, which would indicate a much bigger problem than you could fix with a little epoxy, the amount of material involved would not be enough to alter the balance that much.
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Old 12-07-2011, 10:14   #12
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Re: Marine Tex in Pitted Max-Prop ?

Quote:
Originally Posted by Benebobby View Post
Wouldn,t that make a maxprop unbalanced ? I have to think the difference in wght between the metal that was there and the epoxy is significant.
Well, how about the difference in weight between NO metal or epoxy (the case when there are pits) and the virgin blades... if that unbalance was ok, then adding the epoxy can only improve things, balance-wise.

Cheers,

Jim
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Old 12-07-2011, 11:43   #13
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Re: Marine Tex in Pitted Max-Prop ?

At the low RPM of most sailboat props, I suspect the imbalance would be negligible or at least imperceptible. More to the point, this sounds like a pretty bad bandaide approach to a more insidious problem and wonder why you/anyone would not try to rectify the problem.
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Old 12-07-2011, 12:36   #14
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Re: Marine Tex in Pitted Max-Prop ?

I sent my blades back to PYI after catching a chain in the prop. They repaired the blades to like new for less than it cost to haave the boat hauled.
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Old 12-07-2011, 16:07   #15
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Re: Marine Tex in Pitted Max-Prop ?

It is the additives that makes JB Weld different from other epoxies. Just like MarineTex can stand UV way better than other epoxy products.

I use JB Weld on plastics too, great stuff

ciao!
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