Best 2 Stroke Outboard Oil Reservoirs for Mercury, Mariner, and More
If you operate a 2-stroke outboard, a reliable oil reservoir is essential for smooth operation and long engine life. The right reservoir fits your model, seals tightly, and resists heat and vibration. This guide highlights five compatible oil tanks designed for Mercury, Mariner, Evinrude/Johnson, and other 2-stroke systems. It helps boaters choose based on engine type, installation needs, and durability. Ideal buyers include professional charters, weekend anglers, and DIY boat owners who want a direct OEM-compatible replacement or an affordable upgrade.
Quick buying snapshot: the table below summarizes the five recommended reservoirs and their primary suitability. This helps you compare compatibility, installation ease, and durability at a glance.
| Product | Best For | Key Benefit |
|---|---|---|
| FASWORX Oil Tank Reservoir Assembly | Mercury/Mariner 3.0L V6 2-stroke | Direct OEM replacement with wide compatibility |
| Quicksilver 828361A2 2-Cycle Oil Reserve Tank | Mercury/Mariner 65-90hp | Translucent, easy monitoring |
| Outboard Motor Oil Tank (ABS) | General 2-stroke fits | Leakproof cap, durable ABS |
| Spryflower Fuel Tank With Cap | 2-stroke, compact setups | Tight seal, portable design |
| Johnson/Evinrude/OMC Remote Oil Tank Kit | Evinrude/Johnson remote systems | Complete mounting hardware and hose |
FASWORX Oil Tank Reservoir Assembly
Features include wide compatibility with Mercury, Mariner, and Mercury Racing 3.0L V6 2-stroke engines across 200HP to 300HP models. It is designed as a direct OEM replacement for part numbers such as 8M0119508, 8M0064073, 830889A1, and 818456A1, ensuring a seamless install. The reservoir is constructed of high-impact, translucent polymer that resists UV degradation and tolerates the heat and vibration common to marine engines.
Best for: Boat owners seeking an OEM-style replacement that fits several Mercury/Mariner 2-stroke configurations. Choose this if you want a familiar form and mounting pattern that matches factory parts. Limitations: installation requires attention to compatibility with your exact model number and may not fit non-Mercury systems without adapters.
Quicksilver 828361A2 2-Cycle Oil Reserve Tank
Designed for select Mercury and Mariner 65-90hp 2-cycle jet and standard outboards, this translucent tank allows easy monitoring of oil levels. Installation is straightforward with common shop tools, and owners should verify fitment with their owner’s manual or parts list. Best for: Smaller to mid-range 2-stroke engines where quick checks and simple installation are priorities. Limitation: not universal for all Mercury/Mariner engines; confirm exact model compatibility.
Outboard Motor Oil Tank, ABS Reservoir
This reservoir uses a tight-sealing cap to prevent leaks and spills, addressing common concerns on rough water. Made from ABS material, it offers high strength and durability to withstand daily use and engine heat. Best for: Operators seeking a leak-resistant, sturdy tank with reliable performance for longer trips. Caution: verify clearance in your engine bay to ensure proper fit and cap access.
Spryflower Fuel Tank With Cap
Leakproof design with a tight sealing cap helps prevent spills on rough waters. Built from high-strength ABS, it resists daily wear and offers a long operational life. Best for: Portable, compact setups where space is limited and secure storage is essential. Limitation: may be smaller than full OEM tanks, potentially requiring refills more often on long trips.
Johnson/Evinrude/OMC Remote Oil Tank Kit
OEM-style kit that includes mounting hardware, a 10-foot supply hose, and primer assembly. It is suited for Evinrude direct injection engines and Johnson/OMC remote setups. Best for: Engines that require a full remote reservoir with included hose and primer for reliable priming and oil supply. Caution: verify fitment with your boat’s engine model and installation requirements.
A.A Gear Oil Lube Reservoir Bottle and Sensor
MerCruiser gear lube reservoir that replaces part numbers 806193A51 and 8M0075708. This option is targeted at MerCruiser gear systems and offers a compatible replacement path for owners of those engines. Best for: MerCruiser-equipped boats needing a direct reservoir replacement. Limitation: primarily aligned with MerCruiser gear systems rather than universal 2-stroke outboard setups.
Fuel Tank With Cap Stable Structure For Outboard
Leakproof design with a stable cap and ABS construction for durability. This tank ensures secure fuel storage during long trips and rough water. Best for: Users needing a sturdy, leak-resistant reservoir with dependable cap closure. Caution: verify fitment with your specific engine model to avoid misfit issues.
Buying Guide
Key considerations when choosing a 2-stroke outboard oil reservoir:
- Engine compatibility: Confirm model, horsepower, and whether the tank is designed for Mercury/Mariner, Evinrude/Johnson, or universal 2-stroke systems.
- Material and durability: Look for UV-resistant, high-impact polymers or durable ABS that withstand heat and vibration.
- Sealing and leaks: A tight-sealing cap reduces spills and fuel loss during trips; check for leakproof design features.
- Installation requirements: Some kits are OEM replacements; others require mounting hardware and hoses. Ensure you have or can obtain the necessary components.
- Monitoring features: Translucent tanks allow quick oil level checks, a practical advantage for routine maintenance.
- Size and capacity: Consider available space in the engine bay and needed capacity for your typical trips to avoid frequent refills.
Practical buying questions
- Is the reservoir a direct OEM replacement for my engine? Check part numbers and compatibility lists.
- Do I need a complete kit with hoses and primer, or just the tank? Choose based on your current setup.
- Will the tank withstand marine conditions such as salt exposure and heat? Opt for UV-resistant and durable materials.
- Can I visually inspect the oil level easily? Translucent designs help with quick checks.
- Will the reservoir fit in my engine bay without interference? Measure space and access for the cap.
- Are there any warranty or return considerations if the fitment is incorrect? Verify seller policies before purchase.
Frequently Asked Questions
- What is an oil reservoir in a 2-stroke outboard? It stores engine oil used by the lubrication system and supports consistent oil delivery to the engine.
- Why choose OEM-replacement reservoirs? They typically match mounting patterns and fitment for easier installation and reliable operation.
- What materials are best for marine reservoirs? UV-resistant, high-impact polymers or ABS provide durability against sun, heat, and vibration.
- How do I know if a reservoir is compatible with my engine? Check the part numbers, horsepower range, and the engine family (Mercury, Evinrude/Johnson, etc.).
- Can a reservoir be used with aftermarket oil injection systems? Many are designed for compatibility, but confirm with your engine’s service manual.
- What maintenance is required for a reservoir? Regularly inspect seals, cap tightness, and ensure no cracks or leaks, especially after impacts or rough use.