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121857-55710 Marine
FILTER, FUEL
Fuel filter — sizing & interchange
Yanmar fuel systems are two-stage: a coarse ~30 micron primary water-separator (often a Racor 500FG) and a fine on-engine filter (~10 micron mechanical / ~2 micron common-rail). Never put a finer filter ahead of a coarser one. See the guide for spin-on/element cross-references and Racor element pairing.
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OEM interchange
Other OEM part numbers for the same part — order from any of these makers or their dealers.
Aftermarket equivalents cross-ref
Third-party equivalents (Jabsco, Sierra, WIX, Mann…) — not OEM; verify before ordering. Usually cheaper than the marine dealer.
| Equivalent P/N | Brand | Description | Source | Confidence |
|---|---|---|---|---|
| FF5421 | Fleetguard | Fuel filter (primary) — 6JH3/4 series - Fleetguard FF5421 via 121857-55710 cross; note=verify | dieselpartsdirect.com | unverified |
| PS4886 | Fram | Fuel filter for MINI-17/26/29/33/44/55; cross via Mitsubishi 32A62-01020 | fuelfilter-crossreference.com | likely |
| E471KP | Hengst | Fuel filter for SK-60 (Kubota V2403); cross via Kubota 16271-43562 | fuelfilter-crossreference.com | likely |
| H17WK09 | Hengst | Fuel filter for MINI-17/26/29/33/44/55; cross via Mitsubishi 32A62-01020 | fuelfilter-crossreference.com | likely |
| P45 | Mann | Fuel filter for SK-60 (Kubota V2403); cross via Kubota 16271-43562; also fits Sole Mini series per solediesel.nl listing | fuelfilter-crossreference.com | likely |
| 33263 | WIX | Fuel filter for SK-60 (Kubota V2403); cross via Kubota 16271-43562 | fuelfilter-crossreference.com | likely |
| 33394 | WIX | Fuel filter for MINI-17/26/29/33/44/55; WIX confirmed "Mitsubishi engines" on 10 micron spec | fuelfilter-crossreference.com | likely |
| BF7534 | Baldwin | Fuel filter for MINI-17/26/29/33/44/55 (S3L2/S4L2); cross via Mitsubishi spin-on 32A62-01020; verify spin-on vs element type for your installation | ab-marineservice.com; fuelfilter-crossreference.com | confirmed |
| P550390 | Donaldson | Fuel filter for MINI-17/26/29/33/44/55; cross via Mitsubishi 32A62-01020 | filters-king.com; fuelfilter-crossreference.com | confirmed |
| FF5160 | Fleetguard | Fuel filter for MINI-17/26/29/33/44/55; cross via Mitsubishi 32A62-01020 | ab-marineservice.com; fuelfilter-crossreference.com | confirmed |
| WK940/16x | Mann | Spin-on fuel filter 4LH/4LHA M20x1.5 - also element for assy 129495/129677-55600 | ab-marineservice.com; dieselpartsdirect.com | confirmed |