12340-ZW5-000 Honda Chamber PCV | Genuine Used Part

🔧 Product Description

Genuine Used Honda BF115 / BF130 Crankcase Ventilation Chamber - Part Number: 12340-ZW5-000

A genuine pre-owned Honda Marine positive-crankcase-ventilation chamber for selected BF115 and BF130 four-stroke outboards.

Honda identifies the component as the PCV chamber assembly. It forms part of the engine's crankcase-breather system, helping separate oil mist from crankcase vapours before the vapours are routed back towards the intake system.

⚙️ Key Features

• Genuine Honda Marine used PCV chamber
• Correct OEM part number 12340-ZW5-000
• Used on selected BF115 and BF130 inline four-cylinder engines
• Crankcase-breather and oil-separation component
• Helps control oil mist entering the intake
• Original Honda moulded chamber
• Obsolete or limited-availability service component

🚤 Compatibility

Verified applications include

• Honda BF115AX
• Honda BF115A2
• Honda BF130AX
• Honda BF130A2
• Early Honda BF115A and BF130A four-stroke engine families
• Inline four-cylinder engines using the ZW5 cylinder-block assembly

Representative application period

• Approximately 1999 onward for early BF115 and BF130 production
• Exact fitment is controlled by engine serial-number range and cylinder-block diagram

Important fitment note

• Later Honda BF115 and BF130 engine generations use different crankcase-ventilation arrangements.
• Confirm the ZW5 engine-family prefix and original chamber number.
• Hoses, nipples, clamps and mounting hardware are included only when shown or described.

🔌 Function

Normal piston movement creates pressure pulses and oil mist inside the crankcase.

The PCV chamber helps

• Separate suspended oil from crankcase vapours
• Return separated oil towards the engine
• Route vapours to the intake for controlled combustion
• Reduce oil contamination inside the air silencer
• Maintain normal crankcase pressure
• Limit external oil leakage caused by poor ventilation

⚠️ Common Signs of Failure

• Excessive oil inside the air intake
• Oil leaks from seals or gaskets
• Crankcase pressure is excessive
• Breather hoses collapse or split
• Engine emits abnormal oil vapour
• Chamber is cracked
• Hose nipple is broken
• Internal passages are restricted by sludge
• Oil consumption increases
• Idle quality changes because of an air leak in the breather system

🛠️ Service Notes

Recommended checks before installation

• Inspect the chamber for cracks
• Check every hose nipple
• Clean internal passages carefully
• Replace hardened breather hoses
• Inspect clamps and grommets
• Confirm the chamber is not blocked by sludge
• Check engine-oil level and condition
• Investigate excessive crankcase pressure before fitting a replacement
• Confirm all hoses are routed exactly as shown in the Honda diagram

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 12340-ZW5-000
• 12340ZW5000
• OEM Description: Chamber, PCV
• Alternate Description: PCV Chamber Assembly
• Alternate Description: Crankcase Breather Chamber
• Related breather hoses, clamps and cylinder-block fittings vary by model

Aftermarket / Verified Equivalents

• No aftermarket equivalent

Other-Brand Equivalents

• No verified Mercury, Yamaha, Suzuki, Volvo Penta or generic marine equivalent
• No verified Honda automotive part-number interchange should be assumed

Service alternatives

• Genuine used Honda PCV chamber
• Genuine new-old-stock Honda chamber
• Professionally cleaned original chamber where the housing is undamaged

📦 Condition

• Genuine Honda Marine used part
• Pre-owned crankcase-ventilation component
• Cosmetic marks and oil residue may be present
• Internal cleanliness and all hose fittings must be checked
• No claim is made that the component has been cleaned or tested
• Supplied components are limited to those shown or described
• Supplied in protective or equivalent packaging