Genuine Honda BF175D-BF250D Left Exhaust Manifold - Part Number: 18120-ZVL-000ZA
A genuine Honda left-side exhaust manifold for later BF175D, BF200D, BF225D and BF250D V6 four-stroke outboards. The NH8 suffix denotes the dark-grey finish. It collects exhaust from the left cylinder bank and incorporates water-jacket and thermostat-related passages within the outboard cooling system.
⚙️ Key Features
Genuine Honda OEM left exhaust manifold
Correct part number 18120-ZVL-000ZA
NH8 dark-grey finish
Left cylinder-bank application
Water-jacketed V6 exhaust component
🚤 Compatibility
Honda BF175D
Honda BF200D and BF200DK1
Honda BF225D and BF225DK1
Honda BF250D
Approximate year range: 2018 onward
Exact revision is controlled by engine serial number
🔌 Function
The manifold collects exhaust gases from the left cylinder bank and transfers heat to the engine cooling water before directing exhaust toward the midsection.
⚠️ Common Signs of Failure
Internal corrosion or blocked water jacket
Exhaust or cooling-water leak
Warped gasket face
Cracked casting
Overheating on one cylinder bank
Water intrusion into an exhaust passage
🔄 Supersession & Cross Reference
OEM Supersession Chain
18120-ZVL-000ZA is the documented original service reference
18120-ZVL-B10ZA is a later serial-controlled related revision
The B10ZA version should not be treated as a universal replacement without serial validation
OEM / Related Numbers
18120-ZVL-000ZA
18120-ZVL-B10ZA later related revision
Related right exhaust manifold
Related exhaust-manifold gaskets
Related thermostat, cover and water-tube components
Related mounting bolts and hose clamps
Aftermarket / Verified Equivalents
No verified complete aftermarket exhaust manifold
Genuine Honda 18120-ZVL-000ZA or the serial-correct revision is required
Aftermarket gaskets and thermostat service parts may be available separately
Used genuine manifolds must be inspected for internal corrosion and flat sealing faces
