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Old 07 September 2016, 12:44   #1
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Rydlyme

Last few seasons, life has got in the way and my DF140 hasn't had the use it should. Just 2 full weeks family holiday each season with a full 12 months of the boat sitting at home on its trailer in between.
First year this happened I ran it up every 6 weeks or so through a big tub with diluted anti freeze in.
Last 2 seasons I've not done this.
It's still been serviced each season and on its last one I had the anodes changed. The dealer commented he'd cleaned up excessive "corrosion" whilst fitting the anodes.
Although a 2008 motor, it only has 250hrs but I'm thinking the lack of use is more likely the cause of the corrosion (more likely salt and limescale).
I've now noticed that the telltale isn't as powerful as usual so I'm thinking of flushing through this Rydlyme that the yanks seem to rave about.
First question is: Has anyone else used it?
Second question: the instructions on their website advises pumping through the muffs with engine off.. Without studying a diagram of the cooling system, would this ensure the fluid went right around the whole cooling system before exiting through the exhaust and/or telltale?
If anyone can recommend another product or method of clearing out the cooling system id be happy to hear.
Oh, and I always use boat in saltwater and always flush for 5 to 10 min after use.
Many Thanks
Colin
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Old 07 September 2016, 15:49   #2
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Yes I used it on the same engine. I diluted 2 litres of Rydlyme into a tub of water and ran the engine straight from the tub. I tried following the cold method first but not much happened. When warm I got a lot of scale and muck coming out into the bucket. Remove the stupid plastic tell tale jet thing - that will block straight away. When finished I removed the thermostat and it was like new - beforehand it was a bit crusty
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Old 07 September 2016, 16:37   #3
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This was talked about couple of months ago so may help


Salt-away anyone use it?
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Old 07 September 2016, 17:13   #4
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Thanks for replies.

Diver1 - how long did you run it for? How big was the tub you used?

Fred - thanks for the link. I had read that thread but it seemed to be more about Salt Away. I've read somewhere on t'intetnet that Salt Away doesn't work on scale and caked on deposits?
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Old 07 September 2016, 17:40   #5
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Brick acid/patio cleaner is apparently the major active component in rydlyme at seriously less money
Rydlyme works well but it's eye-wateringly expensive
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Old 08 September 2016, 02:11   #6
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Beamishken - That's slightly worrying. I've witnessed many an apprentice bricklayer or plasterer leave his cement encrusted tools in brick acid overnight 'coz he can't be bothered cleaning them. After just one night they're left with just a trowel handle!!
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Old 08 September 2016, 04:21   #7
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Suzuki Marine - FAQ - Fighting Corrosion

http://www.force4.co.uk/starbrite-de...B#.V9EwZygrLIU

for info
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Old 08 September 2016, 09:46   #8
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Quote:
Originally Posted by cjj216 View Post
Without studying a diagram of the cooling system, would this ensure the fluid went right around the whole cooling system before exiting through the exhaust and/or telltale?
Assuming you have enough water pressure, the overall effect is the same as running while on the water, so yes, it will hit all the places seawater normally gets pumped to. You do have to run it long enough to get the thermostat to open (assuming you have one, of course; it shouldn't take very long to get to that point), but after that, you're good.

jky
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Old 08 September 2016, 12:16   #9
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Thanks for replies.
I notice the starbrite product actually recommend flushing through from a tub with motor running. Rydlyme seem to only recommend pumping through with an electric pump with engine off, which as mentioned wouldn't open the thermostat.
That said, they're probably all similar products. I'll be using one of them soon so I'll post my results.
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Old 08 September 2016, 12:58   #10
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There's a lot of mention of just flushing through with warm water if flushing through every use with fresh water should keep it clear I used salt away once a year but not sure it did anything so I think I will take an internal anode out in future to check for salt build up OMO
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