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Mermaid Merlin (Ford FSD 425) Marine

Mermaid Marine Mermaid Merlin (Ford FSD 425) · MERLIN family: specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.

🚜 Base engine confirmed

The Mermaid Merlin (70hp) is a marinized Ford FSD 425 York 2.5L DI (2498cc 93.67x90.54) 4-cyl block (Transit lineage); internals cross to Ford FSD425 part numbers. source

70 hp51.5 kW
2498 ccdisplacement
93.7×90.5 mmbore × stroke
4-cylcylinders
1987–1999year range (approx)
NAaspiration
📋 Full specifications 23 🚜 Industrial / tractor base 🔧 Aftermarket 1
Cheaper-part coverage · 1/8
🚜 Base engine ✓🌀 Impeller💧 Raw-water pump🛢️ Oil filter⛽ Fuel filter🌡️ Thermostat➰ Belt⚓ Anode

A ✓ means at least one cheaper channel — aftermarket, the tractor/industrial base engine, or a standard component — exists for this engine in that category.

Parts by section · 37 assemblies

The exploded parts diagrams for the Mermaid Merlin (Ford FSD 425), grouped by system. Open a figure for its callout part numbers and per-variant quantities.

Body

Fig 8 — pn _ 4/1 PAGE NO! 7aFig 10 — SECTION ILLUSTRATION DESCRIPTIONFig 11 — SECTION. __ pescriptionFig 12 — SECTION It ILLUSTRATION. 14 sd DESCRIPTION OIL FILTER ADAPTORFig 14 — SECTION. "ssFig 17 — SECTION ILLUSTRATION ___ DESCRIPTION __Fig 18 — SECTION 20 pescription _ PumpFig 19 — SECTION. ~~ sf _ "VECTOR PIPESFig 20 — KEYNO | MERMAID PART NO DESCRIPTION ENGINETYPEFig 24 — II 26 ENGINE FOOTFig 25 — If 28 RAW WATER PUMPFig 28 — II 31 RAW WATER SYSTEM N/AFig 29 — II 32 RAW WATER SYSTEMFig 34 — II 37 UMP PUMP & BRACKETFig 36 — II 39 TURBO CHARGER

Cooling

Fig 16 — IT 18 HEAT EXCHANGERFig 26 — II 29 FRESH WATER SYST N/AFig 27 — II 30 FRESH WATER SYSTEMFig 31 — II 34 FRESH WATER PUMP

Crankshaft & Pistons

Fig 3 — II 5 CRANKSHAFTFig 13 — SECTION II 15 DESCRIPTION FLYWHEEL HOUSING

Electrical

Fig 2 — II 2 ALTERNATORFig 32 — IL STARTER MOTORFig 37 — II 40 INSTRUMENTS

Engine Block & Head

Fig 9 — IT 11 CYLINDER BLOCK EICFig 15 — SECTION ILLUSTRATION DESCRIPTION ___HEAD CYLINDER

Inlet & Exhaust

Fig 1 — SECTION II JP _ DESCRIPTION _72® INTAKE FILTERFig 21 — Il 23 MANIFOLD EXHAUSTFig 22 — IT 24 INLET MANIFOLDFig 23 — il 25 INLET MANIFOLDFig 35 — It 38 EXHAUST ELBOW

Lubricating

Fig 5 — II 7 ENGINE OIL COOLERFig 6 — II 8 ENG. OIL COOLER TURBOFig 7 — SECTION _ 11 SMESSION OIL COOLERFig 30 — II 33 SUMP (OIL)

Valve Train

Fig 4 — Ir 6 CAMSHAFT ASSYFig 33 — II 36 VALVE & VALVE GEAR
📚 Manuals & Sources
Specs— none yet
Operator's Manual— none yet
Service / Workshop Manual— none yet
Parts Catalog / List— none yet
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Category
Marine
Engine family
MERLIN
Year range (approx)
1987–1999
Cylinders
4
Rated output
70 hp (51.5 kW)
Bore × stroke
93.7 × 90.5 mm
Displacement
2498 cc
Aspiration
Naturally aspirated