I have a Yanmar 1GM on my Hunter 27.. I pulled the mixing elbow for an inspection and found at least 1/8th of an inch of carbon built up in it... What would be the best way to clean it out?
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Gene
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Dean Strong
Where did you get the sand blaster?
Gene, Where did you get a sandblaster? I'd like to sandblast my keel next year, and the yard says its about $700 to have someone come in and do the job. I'd rather do it myself if it is possible.
Gene, Where did you get a sandblaster? I'd like to sandblast my keel next year, and the yard says its about $700 to have someone come in and do the job. I'd rather do it myself if it is possible.
All different size sand blasters.
Dean: There are all different size sand blasters. Some are large enough to do a bridge or municipal water tank. Others are small enough to do something like a mixing elbow. You need a large compressor to keep up with the capacity to do something like your keel. The other problem is that you then have several hundred pounds of contaminated sand that YOU will need to dispose of. If it has bottom paint in the sand it is considered toxic waste. Some yards will not even let you sand your boat bottom because of this by product.
Dean: There are all different size sand blasters. Some are large enough to do a bridge or municipal water tank. Others are small enough to do something like a mixing elbow. You need a large compressor to keep up with the capacity to do something like your keel. The other problem is that you then have several hundred pounds of contaminated sand that YOU will need to dispose of. If it has bottom paint in the sand it is considered toxic waste. Some yards will not even let you sand your boat bottom because of this by product.
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Dean Strong
Steve: Back to keels
Steve, I know you've been following the thread re: rust on my keel. I made fast progress with a "twisted" wire brush, but missed some small rust spots that began to "bleed." That's why I'm considering sandblasting. But what if I took off the bottom paint, epoxy I've used, and the gel coat Hunter applied with the wire brush, down to the metal, then used a blaster to make sure ALL of the rust was removed. In your opinion, is this doable if the yard will consent?
Steve, I know you've been following the thread re: rust on my keel. I made fast progress with a "twisted" wire brush, but missed some small rust spots that began to "bleed." That's why I'm considering sandblasting. But what if I took off the bottom paint, epoxy I've used, and the gel coat Hunter applied with the wire brush, down to the metal, then used a blaster to make sure ALL of the rust was removed. In your opinion, is this doable if the yard will consent?
Dean, why not?
Dean: You should review this website http://us.yachtpaint.com/usa/boat_painting_guide/bpg2001/boaters_guides/pages/p23_24.htm It gives you an exact run down of what you need to do and what you should watch out for. It seems to me that any way you can get down to bright shinny metal will work. They post some very explicit instructions on getting the metal cleaned and primed ASAP. When you use a sand blaster you need a compressor. If the tank is NOT big enough it is a real pain. I suppose that you could blast and paint a little at a time. I think you can get a small sand blaster at Sears, Home Depot or most any other place that carries tools for compressors. I will be interested in knowing what they yard has to say about this. I do not know why they wouldn't let you do it if they would let a sub-contracter in. You would need to be responsible for the clean up and that may be the rub. If you don't clean it up properly, what are they going to do to you?
Dean: You should review this website http://us.yachtpaint.com/usa/boat_painting_guide/bpg2001/boaters_guides/pages/p23_24.htm It gives you an exact run down of what you need to do and what you should watch out for. It seems to me that any way you can get down to bright shinny metal will work. They post some very explicit instructions on getting the metal cleaned and primed ASAP. When you use a sand blaster you need a compressor. If the tank is NOT big enough it is a real pain. I suppose that you could blast and paint a little at a time. I think you can get a small sand blaster at Sears, Home Depot or most any other place that carries tools for compressors. I will be interested in knowing what they yard has to say about this. I do not know why they wouldn't let you do it if they would let a sub-contracter in. You would need to be responsible for the clean up and that may be the rub. If you don't clean it up properly, what are they going to do to you?
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Dean Strong
I'll keep you posted
Thanks Steve, I'm all to familiar with the Interlux we site. In addition to the pages from their usage guide posted on the web, there is an additional bulletin for Interprotect and Iron/steel hulls and keels below the waterline. I'm going to keep researching the sandblasting. Environmental laws are getting tough here, we have to tent now even when sanding by hand, etc. The guy they allow to blast has a BIG truck, with a BIG tent, and a BIG hose for sucking up the sand as he blasts it. Maybe it uses thes same sand over and over again, just one big sandblasting whirlwind. Who knows? The bottom line is that it is expensive, and why I'm looking into doing it myself. Besides, I bet its kind of fun---kind of like power washing---every male's ultimate chore (ugh, ugh). Cleanup was my main concern, which is why I'm thinking of only sandblasting at the very end of the job---to get the keel the absolute cleanest, but keep the volume of sand down to the minimum. I'll undoubtedly post whatever I find out and whatever I end up doing. And since a search on "Dion" in the archives results in about 500 hits, you'll undoubtedly read it! Blueman s/v Synchrony (which in Latin, means "shiny keel")
Thanks Steve, I'm all to familiar with the Interlux we site. In addition to the pages from their usage guide posted on the web, there is an additional bulletin for Interprotect and Iron/steel hulls and keels below the waterline. I'm going to keep researching the sandblasting. Environmental laws are getting tough here, we have to tent now even when sanding by hand, etc. The guy they allow to blast has a BIG truck, with a BIG tent, and a BIG hose for sucking up the sand as he blasts it. Maybe it uses thes same sand over and over again, just one big sandblasting whirlwind. Who knows? The bottom line is that it is expensive, and why I'm looking into doing it myself. Besides, I bet its kind of fun---kind of like power washing---every male's ultimate chore (ugh, ugh). Cleanup was my main concern, which is why I'm thinking of only sandblasting at the very end of the job---to get the keel the absolute cleanest, but keep the volume of sand down to the minimum. I'll undoubtedly post whatever I find out and whatever I end up doing. And since a search on "Dion" in the archives results in about 500 hits, you'll undoubtedly read it! Blueman s/v Synchrony (which in Latin, means "shiny keel")
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Dean Strong
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