I just read this in a Yanmar Manual:
6) Washing the Turbocharger Blower When engine speed seems sluggish or the exhaust color poor, the blades of the turbocharger blower may be dirty. Wash the blower in the following manner. 1. Have ready blower wash (liquid detergent), fresh water, and a small pitcher. Blower Wash (4L) Parts Code:974500-00400 2. Put the clutch in neutral and run the engine at high speed (2500∼3000rpm). 3. Slowly pour approximately 50cc of blower wash into the turbocharger air intake over a period of about 10 seconds. 4. After about 3 minutes, pour in approximately 50cc of fresh water in the same manner over a period of about 10 seconds. 5. After operating the engine for about 10 minutes, check the boost pressure and power output. If there is no improvement after washing the blower, repeat the washing process several times. If there is still no improvement consult your local Yanmar dealer. This sounds kind of crazy, spraying soapy water and then water into your intake – Has anyone ever done this or know of anyone who has? Bill Coleman C&C 39 Erie, PA
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