# 40-10010100 Aftermarket Parsun Free Piston Sub-Assembly | Sawley's Select Marine Parts

🔧 Product Description

  

Aftermarket Parsun F30/F40 Free Piston Sub-Assembly - Part Number: T40-10010100

  

A complete internal free-piston group for the Parsun T40 locating cylinder. It separates and controls hydraulic volume within the cylinder, cushions pressure changes and supports stable trim/tilt movement.

  

⚙️ Key Features

  

• Complete free-piston sub-assembly - Part Number: T40-10010100 / PAT40-10010100

• Included components:

• T40-10010101 - Free piston

• T40-10010102 - Spring

• T40-10010104 - Seal

• T40-10010103 - Bolt bush

• T40-10010105 - Piston bush

• GB/T70.2-M4x35 - M4 × 35 screw

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• PAT40-10010100 → Recmar/Parsun packaged reference for T40-10010100

• T40-10010100 → Internal sub-assembly of locating cylinder T40-10010000

  

OEM / Related Numbers:

  

• T40-10010100

• 40-10010100

• PAT40-10010100

• T40-10010101

• T40-10010102

• T40-10010104

• T40-10010103

• T40-10010105

• GB/T70.2-M4x35

  

Aftermarket / Verified Equivalents:

  

• Recmar: PAT40-10010100

• No confirmed other-brand complete free-piston equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Parsun T40 locating cylinders

  

Typically suits:

  

• Engine / drive models:

• Parsun F30

• Parsun F40

  

• HP Range: 30-40 HP

• Engine / Drive Type: Internal hydraulic free-piston and spring assembly

• Year Range: Model-dependent; no universal year range is published

• Serial / Identification Range: Confirm T40-10010100 in the locating-cylinder exploded diagram.

  

🔌 Function

  

Controls internal hydraulic displacement and cushioning so the locating cylinder moves smoothly and maintains stable pressure.

  

Common signs of failure or replacement requirement:

  

• Harsh or jerky trim movement

• Internal bypass and poor position holding

• Unusual hydraulic knocking

• Damaged seal or piston wear found during teardown

• Contaminated fluid causing the free piston to stick

  

📦 Condition

  

• Brand-new aftermarket replacement kit

• Supplied as new replacement components

• Supplied in suitable retail or equivalent packaging

## Details

- **Price:** 68.6 AUD
- **Vendor:** Sawley's Select Marine Parts
- **Type:** Drives & Propulsion
- **Tags:** Power Trim, Sawley's Select – Power Trim | Trim & Tilt Systems & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 68.60 AUD | In stock |

## Images

- 40-10010100 Aftermarket Parsun Free Piston Sub-Assembly | Sawley's Select Marine Parts
- 40-10010100 Aftermarket Parsun Free Piston Sub-Assembly | Sawley's Select Marine Parts - photo 2 of 2

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/40-10010100-free-piston-sub-assy-pat40-10010100-for-parsun-engines)
> Updated: 2026-09-05