Immersion: For small components, soak them directly in a container with DE-20 . It can also be used by filling completely the cooling system and letting it work.
Outboard: Mix in bucket, DE-20 with fresh water and place it under the propeller. Start the engine and let it absorb the mixture through the water inlet and circulate for about 15 minutes.
Inboard: a pumping system is needed to inject DE-20 and recover it for recirculation. Depending on the extent of scaling, use a solution of 25-50% with fresh water and do not exceed 45 minutes of application. The solution has a red colour which disappear when it is neutralised.