Yanmar — Turbocharger Compressor Water Cleaning (TPS44, 720/750 min-1)
Maintenance
From a Yanmar manual — check it applies to your exact model before use.
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Before you start
- Always use freshwater. Never use seawater because it causes corrosion.
- Do not use cleaning water with coolant.
- Do not clean the compressor immediately before stopping the engine; it can cause rust.
Procedure
- Operate the engine at 30 % to 40 % of the rated load.
- Open the drain cock of the intake air chamber.
- Fill cleaning fluid into a hand pump (approximately 0.25 l).
- Connect the cleaning hose to the filler of the turbocharger.
- Slowly fill in the cleaning fluid (take 20 to 40 seconds).
- Wait 10 minutes or more and do the cleaning again. (Repeat a maximum of 3 times.)
- After cleaning, close the drain cock and attach the cap on the filler plug.
- Run the engine under load for at least 10 to 15 minutes to dry the engine.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Approx. 0.25 l cleaning fluid per fill
Source: Yanmar manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.