alt
Well-known member
Looks great... very similar to my before and after.Thanks and well done. I did mine too a few weeks ago while renewing the coolant and inspired by all the posts above. I used 100g of oxalic acid powder, 1/2 litre of warm water and a small handfall of peal barley (i expect rice will work too). Removed the tank from the engine, sealed all the orifices, added the ingredients and shook violently for 10 minutes. Emptied and flushed out being careful to ensure all the pearl barley was out. Excellent result. The pearl barley was added as there was some hard residue at the bottom of the tank that needed some agitation. After and before pictures.
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www.solocoastalsailing.co.uk
Rather than shaking, I just filled mine to the brim and turned upside-down half way through (as there's always some air left).
Don't know why I didn't do it years ago!