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Home›Repair guides›Cummins/Onan›Sea Water Strainer - Clean and Assemble

Cummins/Onan — Sea Water Strainer - Clean and Assemble

Maintenance

From a Cummins/Onan owner's manual covering: QSM11, QSM11 Industrial, QSM11 Marine, QSM1i. Check it applies to your exact model before use.

Applies to: Cummins/Onan QSM1i, Cummins/Onan QSM11 engine

Before you start

  • A restricted or clogged sea water strainer can result in overheated engine coolant and marine gear oil temperatures.

Procedure

  1. Loosen and remove the sea water strainer wing nut(s).
  2. Remove the sea water strainer assembly; retain and inspect o-ring.
  3. Remove the strainer basket and empty all debris.
  4. Clean the sea water strainer.
  5. Prime with clean water.
  6. Install strainer; replace o-ring if damaged and seat properly.
  7. Install and tighten the wing nut(s).
  8. Open the sea water inlet valves.

Full service-parts list: Cummins/Onan QSM1i →

Source: Cummins/Onan owner's 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.

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