865380A13 Aftermarket Mercruiser Oildyne Complete Oil Seal | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket MerCruiser Oildyne Pump/Motor/Reservoir Assembly - Part Number: 865380A13

Complete 12-volt Oildyne low-pressure/high-flow pump and motor assembly with top-mounted fluid reservoir. Despite the abbreviated listing wording, 865380A13 is the hydraulic pump/motor/reservoir unit, not a single oil seal.

⚙️ Key Features

• Complete electric motor, hydraulic pump and top reservoir

• 12 V three-wire Oildyne configuration

• Low-pressure/high-flow MerCruiser trim-pump design

• Fits the applicable remote steel-bracket system

• Also supplied as the hydraulic core within complete bracket kit 865380A25

📋 Kit / Assembly Contents

• 1 × Reversible electric trim motor - serviced within 865380A13

• 1 × Oildyne hydraulic gear-pump/valve assembly - serviced within 865380A13

• 1 × Top-mounted trim-fluid reservoir - serviced within 865380A13

• 1 × Reservoir and pump sealing package - supplied within the assembly

• 1 × Motor-to-pump drive coupling - supplied within the assembly

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 865380A13 → Current pump/motor/reservoir service reference

• 865380A03 → Earlier pump/motor assembly

• 14336A20, 14336A25 and 14336A31 → Related earlier assemblies

• 88183A11 and 88183A12 → Earlier Oildyne pump references

OEM / Related Numbers:

• 865380A13

• 865380A03

• 14336A20

• 14336A25

• 14336A31

• 14336A6

• 14336A8

• 14336A9

• 88183A11

• 88183A12

• Sierra 18-6813

• REC865380A13

Aftermarket / Verified Equivalents:

• Recmar: REC865380A13

• Sierra: 18-6813 trim motor/pump/reservoir

• ARCO/API Oildyne pump-and-motor service families

🚤 Compatibility

Commonly used on:

• MerCruiser remote Oildyne hydraulic trim-pump systems

Typically suits:

• Engine / drive models:

• TR/TRS remote pump systems

• R/MR and Alpha One conversions where 865380A13 is specified

• Alpha One Gen II

• Bravo One, Two and Three remote-pump installations

• HP Range: Drive application; not engine-horsepower specific

• Engine / Drive Type: 12 V three-wire Oildyne hydraulic trim pump

• Year Range: 1983 onward, installation dependent

• Serial / Identification Range: Confirm three-wire motor, top reservoir, hose connection type and remote bracket. Quick-connect and non-quick-connect assemblies differ.

🔌 Function

Converts electrical energy into hydraulic pressure and stores the trim fluid required to operate the sterndrive cylinders.

Common signs of failure or replacement requirement:

• Motor runs slowly or not at all

• Pump runs but develops low pressure

• Fluid leakage from reservoir, pump seals or fittings

• Foaming fluid and jerky trim caused by air entry

• Drive will not hold trim because of internal valve leakage

📦 Condition

• Brand-new aftermarket replacement part

• Supplied as a new replacement component

• Supplied in suitable retail or equivalent packaging