Yanmar — Bleeding the fuel system
Maintenance
From a Yanmar service manual — check it applies to your exact model before use.
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Procedure
- Check the fuel oil level in the fuel tank; refuel if insufficient
- Open the cock of the water separator
- Loosen the air bleeding bolt on the water separator 2~3 turns counter-clockwise
- When fuel coming out is clear with no bubbles, tighten the air bleeding bolt
- Feed fuel with the fuel priming pump or electro-magnetic fuel feed pump
- For electro-magnetic pump, turn starter switch ON and hold 10~15 seconds
Tools required
- Screw driver or spanner Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Yanmar 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.