Mitsubishi — Fuel system priming - fuel filter
Maintenance
From a Mitsubishi service manual — check it applies to your exact model before use.
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Procedure
- Loosen air vent plug at top of filter by turning about 1.5 rotations.
- Unlock priming pump handle by turning counterclockwise, and operate the priming pump.
- Tighten the air vent plug when fuel flows from vent hole without bubbles.
Source: Mitsubishi service 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.