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preventive maintenance

  1. Replacing both Fuel filters - Yanmar 1GM10

    Gear & Maintenance
    I've recently purchased an old Westerly Nomad, and although engine has been working fine, I only ran it for about 10 hrs end of last year and I want to change both Primary and secondary fuel filters so that I know they have both been done. Which one should I change first ? I have never done...