# 859318T2 Mercury MerCruiser Weather Cap | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver SmartCraft 10-Pin Weather Cap - Part Number: 859318T2

  

A genuine Quicksilver 10-pin SmartCraft weather cap used to protect unused SmartCraft connector ports from moisture, dust and corrosion. This cap is commonly used in Mercury / MerCruiser SmartCraft and Zeus rigging applications where a 10-pin connector requires weather protection.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM weather cap

• Correct Mercury part number 859318T2

• 10-pin SmartCraft connector weather cap

• Protects open rigging connectors from water and debris

• Used in Mercury, MerCruiser, SmartCraft and Zeus rigging layouts where specified

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 859318T2 current weather cap reference

• 859318T1 related 10-pin terminator / weather cap family reference

  

OEM / Related Numbers:

  

• 859318T2

• 859318T1

• SmartCraft 10-Pin Weather Cap

• Zeus SmartCraft Rigging Weather Cap

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury / MerCruiser SmartCraft 10-pin rigging connector applications

  

Typically suits:

  

• System applications:

• Mercury SmartCraft harness connectors requiring weather cap 859318T2

• MerCruiser SmartCraft helm and engine harness connector applications

• Mercury Zeus SmartCraft rigging connector applications

• Open 10-pin SmartCraft connector protection applications

• Boat rigging systems using Mercury 10-pin SmartCraft weather cap 859318T2

  

• System Type: SmartCraft / Zeus 10-pin connector protection

• Application Type: Rigging connector cap, not engine-specific service component

  

🔌 Function

  

The weather cap seals and protects an unused SmartCraft connector from moisture, salt, dirt and corrosion.

  

Common signs of failure:

  

• Connector exposed to moisture

• Corrosion on unused SmartCraft pins

• Cap cracked, missing or loose

• SmartCraft fault after water entry

• Harness connector contamination during storage or service

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 18.65 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 18.65 AUD | In stock |

## Images

- 859318T2 Mercury MerCruiser Weather Cap | Genuine Quicksilver OEM Part
- 859318T2 Mercury MerCruiser Weather Cap | Genuine Quicksilver OEM Part
- 859318T2 Mercury MerCruiser Weather Cap | Genuine Quicksilver OEM Part
- 859318T2 Mercury MerCruiser Weather Cap | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](www.sawleysautoandmarine.com.au/products/859318t2-mercury-mercruiser-weather-cap-genuine-quicksilver-oem-part)
> Updated: 2026-05-17