Yanmar — Turbocharger Compressor Water Cleaning (MET18, 900/1000 min-1)
Maintenance
From a Yanmar manual — check it applies to your exact model before use.
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Before you start
- Use cleaning fluid.
- Do not clean the compressor immediately before stopping the engine; it can cause rust.
- If intake air pressure does not return to normal, disassemble and clean the turbocharger.
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).
- Add the same amount of freshwater in the same way.
- Repeat steps 3 to 5 three or four times.
- If the intake air pressure does not come back, wait 10 minutes or more and do the cleaning again.
- After cleaning, close the drain cock and the cap on the filler plug.
- Run the engine under load for a minimum of 1 hour 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
- Fill over 20 to 40 seconds
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.