Back-flushing your outboard with Rydlyme

Bigplumbs

Bigplumbs

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Well I replaced my impeller in this 60 hp mariner 2 stroke and it pumped just about the same as with the old Impeller. The engine never shows any signs of overheating so I suspect a blockage near the tell tale. I decided therefore to try backing flushing backwards through the cooling system with a small pump. I have added Rydlyme to the water as people have told me it is very good. Video of my set up below. This stuff is about £20 for 1 ltr. So I am doing the process you see below repeatedly. Her indoors had a moan when I said we should do it for 2 hrs

 
Always flushed with out fail and recently had a very good run in fresh water. This is an old engine and removing any bolts etc to properly clean it out could easily lead to broken bolts etc. It was pumping OK but I felt it could be better, hence this attempt. Will it help..... Who knows
 
Well after about 4 hours of flushing it through (Yes with the Thermostat in) I am now pleased with how it is pumping........ Never did need to replace that Impeller :)

Who said 2 strokes smoked a little. I can assure you it is not like that once it gets going on the water

 
jrudge said:
What is the engine made of ? Most outboards have a lot of aluminium and suphuric acid dissolves it
Click to expand...
But with rydlyme it’s got buffers making it metal friendly that’s its USP .
It dissolves the alkaline crud without apparently knack ing the metal ……so they claim .

Brick cleaner or regular supermarket 20 % acid is a no no .It etches , micro dissolves as you say the surface and makes it rougher so the next crud grips easier .
 
I had no idea how it was pronounced either so googled it . "Rid lime" is the correct way.
Part of their blurb basically says if its designed for water to flow through it then rydlyme is safe to use. It has no burning effect on the skin and biodegradable.
It looks very impressive stuff from their Web site and Bigplumbs has demonstrated its effectivness (y)
 
Rappey said:
I had no idea how it was pronounced either so googled it . "Rid lime" is the correct way.
Part of their blurb basically says if its designed for water to flow through it then rydlyme is safe to use. It has no burning effect on the skin and biodegradable.
It looks very impressive stuff from their Web site and Bigplumbs has demonstrated its effectivness (y)
Click to expand...

Thanks for that and now I will be able to say it correctly :).

I was very sceptical about it to be honest but a friend of mine who only ever tells you that something is good if it is indeed good recommended it so I thought I would give it a go.

As you can see from the videos I was very impressed.

The main issue is that at £20 for 1 ltr and at only a 50/50 mix it is difficult to get enough quantity to keep the little pump I had running continuously for 2 - 4 hrs as the time taken for the liquid to run through the engine was slow and the little pump was faster. I actually added a little more water so my mix was more like 25/75 I suspect but it still seemed to work. I also slowed the flow a little by using a long delivery pipe so friction helped. Yes I could have fitted a little rheostat to control the flow but that would be quite a bit more faff. It was interesting that as the battery ran down a little the balance in the system was better.

I would most deffo recommend this product to others especially if they have an old outboard where undoing very old bolts is somewhat scary. To do the whole system it is wise to take out the thermostat I am told
 
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