Effect of vinegar on my impeller - Page 2 - SailNet Community
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post #11 of 17 Old 12-29-2013 Thread Starter
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Re: Effect of vinegar on my impeller

If I used Rydlyme I would use an external pump in a closed loop system and let it circulate for an hour or so. Barnacle Buster looks interesting also, still a bit $$$$.

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Originally Posted by miatapaul View Post
I think he uses the pump so he can do it without the motor running, if you have a way to circulate it with the engine running without overheating I don't see why you could not use the it. Do be careful as it says not to over heat it, past 180 degrees, not sure what happens if it happens and remember there may be spots on a running cooling system well over that temp.
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post #12 of 17 Old 12-29-2013
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Re: Effect of vinegar on my impeller

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Originally Posted by kellysails View Post
MaineSail pointed me towards Rydlyme a while back. Oddly, it is really hard to find it in the PNW. My nearest dealer is selling it out of the Bremerton Yacht Club as a side business. It would also require an external pump to circulate it through the system. I was hoping for a somewhat simpler process using cheap house hold products and utilizing the impeller to drive the product through the engine. Oh well, thanks for the info, much appreciated.
You really dont need a fancy recirculation technique to do this with a small marine engine.
Put it in a bucket.
Disconnect the hose from your inlet through-hull and add (using a straight hose barb connector) enough extra hose to reach to the 'bucket'.
Disconnect the hose that feeds your water injection elbow and add (using a straight hose barb connector) enough extra hose to reach to the 'bucket'.
Suck up the contents of the bucket until the recirculation discharge (from the extended hose from the injection hose) begins to flow.
Shut down and wait 15 min. or so; then, run engine 'briefly' (15 seconds or so) to recirculate; etc.
Usually an hour 'soak', will be sufficient unless your engine is 'really' fouled.

In a pinch you can simply ignore recirculation, just suck up the chemicals into your raw water pump until 'gone', then after a time (30 min or so) just 'push' the slug of chemicals through to the next section by reconnecting the pump inlet hose to its throughhull, etc. .... ..... when the water from the exhaust outlet begins to turn brown, youre done; so turn on the engine to stop the chemical reaction and flush the engine with raw water, etc.


Note: When finished recirculating, pour the residual from the bucket down your head (but not enough to come in contact with the porcelain bowl), let soak - to clean off all the calcium deposits from the head's check valve, joker valve ... and the 'overboard' hose which usually becomes totally blocked by calcium deposits over time when flushing with seawater.

Other: CLR and other 'household' chemicals are usually mixtures of hydrochloric, etc. acids, are not 'inhibited' and vs. cast iron will rapidly begin to 'attack' an engine's internal metal components.

Other: After you 'descale' an engine, you 'should' then 'heat soak' the engine for several HOURS by running at near full open 'throttle' and under near full load to re-form the protective 'black' rust (ferrous oxide). This applies with the usage of raw non-inhibited acids such as muriatic, hydrochloric AND 'inhibited' boiler descalers, etc.
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post #13 of 17 Old 12-29-2013
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Re: Effect of vinegar on my impeller

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...Other: CLR and other 'household' chemicals are usually mixtures of hydrochloric, etc. acids, are not 'inhibited' and vs. cast iron will rapidly begin to 'attack' an engine's internal metal components....
CLR is actually inhibited lactic acid and has tested very will both in industry and marine heads. I did not specifically test it on aluminum (simply never had that application). Easier on elastomers, specifically nitrile (Raitan and Groco), than vinegar.

Rydlyme contains inhibited HCl (MSDS). Good product, though.

Really, the MSDS characteristics are very similar; mostly differences in interpretation and writing style. Both have low pH and will not readily burn unbroken skin, but will cause irritation.

I absolutely agree with Rich unknown hydrochloric acid mixtures are a great risk; far too easy to tear things up. Unless the clogging is bad, this is a time for caution. Side-by-side corrosion testing would be interesting. I may have to do that.

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post #14 of 17 Old 12-30-2013 Thread Starter
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Re: Effect of vinegar on my impeller

When taking a close look at the costs, CLR, Rydlyme, and Barnacle Buster are fairly close in price. I need two to three gallons so I just need to suck it up and cough over the $80 - $90 bucks a year. Add in the $25 for the impeller and call it good for RW annual maintenance.

Thank you all for the great information! Much appreciated.
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post #15 of 17 Old 12-30-2013
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Re: Effect of vinegar on my impeller

vinegar is like 10% of that cost and does maybe 90 percent the same in results...really

in any case whatever you do its the maintenance routine that keeps and engine going forever so use whatever you like, other stuff that helps is to close petcocks or suck in freshwater and or a mild cleaning solution when not in use for a while...cleaning the exhaust elbows, greasing water pumps, cleaning impellers, etc...

lime juice and water works too

you can even use pinesol!

good luck

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Re: Effect of vinegar on my impeller

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Originally Posted by kellysails View Post
When taking a close look at the costs, CLR, Rydlyme, and Barnacle Buster are fairly close in price. I need two to three gallons so I just need to suck it up and cough over the $80 - $90 bucks a year. Add in the $25 for the impeller and call it good for RW annual maintenance.

Thank you all for the great information! Much appreciated.
See preceding Post #9 for a relatively simple approach to this maintenance evolution.
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post #17 of 17 Old 12-30-2013 Thread Starter
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Re: Effect of vinegar on my impeller

Trac, who owns Barnacle Buster, has a nice description on flushing the RW system. I think the immersion method would work well for me.

http://www.trac-online.com/pdf/Small..._Sea_Water.pdf
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