# 8m0188327 Mercury MerCruiser 36865448A01 Cap Oil Reservoir | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Trim Pump Oil Reservoir Cap - Part Number: 36-8M0188327

  

Genuine Quicksilver yellow oil reservoir cap used on MerCruiser power trim pump reservoir bottles. This cap is the current replacement for earlier 36-865448A01 and is supplied as the cap only for compatible MerCruiser trim pump reservoirs.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM trim pump reservoir cap

• Correct current Mercury part number 36-8M0188327

• Supersedes 36-865448A01

• Yellow reservoir cap for easy service identification

• Used on MerCruiser power trim pump oil reservoirs

• Cap only; reservoir bottle not included

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 36-8M0188327 → Supersedes 36-865448A01

• 36-865448A01 earlier OEM oil reservoir cap reference

  

OEM / Related Numbers:

  

• 36-8M0188327

• 8M0188327

• 368M0188327

• 36-865448A01

• 865448A01

• 36865448A01

• Yellow trim pump cap

• Power trim oil reservoir cap

• Trim pump reservoir bottle cap

• 8M0188326 related reservoir bottle family reference where specified

• 891736A01 related power trim pump family reference

  

Aftermarket / Verified Equivalents:

  

• Recmar-style replacement trim reservoir caps for 36-865448A01 / 36-8M0188327 applications

• Aftermarket yellow MerCruiser trim pump reservoir cap equivalents where matched to 36-865448A01

• Use only caps with the correct thread and vent / seal design for the reservoir bottle

  

🚤 Compatibility

  

Commonly used on:

  

• MerCruiser power trim pump oil reservoir bottles

• Alpha and Bravo trim pump assemblies using the yellow reservoir cap

• Trim pump service where cap 36-865448A01 / 36-8M0188327 is specified

  

Typically suits:

  

• Drive / transom models:

• MerCruiser Alpha One Gen II power trim pump applications where 36-8M0188327 is specified

• MerCruiser Bravo One power trim pump applications where specified

• MerCruiser Bravo Two power trim pump applications where specified

• MerCruiser Bravo Three power trim pump applications where specified

• MerCruiser Bravo X / XR / XZ trim pump systems where specified

• MerCruiser standard black plastic trim pump reservoir bottle assemblies using the yellow cap

  

• Common Serial Families:

• MerCruiser Alpha One Gen II - serial 0D469859 and up where the trim pump reservoir diagram lists this cap

• MerCruiser Bravo Drives - serial 0B664190 and up where the trim pump reservoir uses cap 36-865448A01 / 36-8M0188327

• MerCruiser Bravo SeaCore and later trim pump assemblies where this cap is specified

  

• Drive Type: MerCruiser Alpha / Bravo trim pump systems where specified

• System Type: Power trim oil reservoir cap

  

🔌 Function

  

The cap closes the trim pump oil reservoir and helps protect the trim fluid from contamination while allowing the reservoir to function as designed.

  

Common signs of failure:

  

• Cap cracked, missing or loose

• Trim fluid contamination around reservoir

• Oil seepage from reservoir opening

• Cap threads damaged

• Old cap not sealing correctly

• Replacement required during trim pump service

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 15.3 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 15.30 AUD | In stock |

## Images

- 8m0188327 Mercury MerCruiser 36865448A01 Cap Oil Reservoir | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/8m0188327-mercury-mercruiser-36865448a01-cap-oil-reservoir-genuine-quicksilver-oem-part)
> Updated: 2026-07-18