jetunit Oil Tank Assembly for Mercury/Mariner Optimax & EFI 110-240 HP (2000-2014) — OEM Fit, 1-Year Warranty

This jetunit oil tank assembly (1200-8M0063190 / 833069T9) is a direct-fit replacement reservoir for select Mercury/Mariner Optimax and EFI outboards from 2000–2014.

If your boat uses a two-stroke oil injection system and the original oil tank is cracked, leaking, or otherwise failing, replacing it with a compatible assembly restores reliable oil delivery and helps protect your engine. This jetunit unit matches OEM part numbers 1200-8M0063190, 833069T9, and 833069T6 and is intended for a range of 110–240 HP Mercury/Mariner Optimax and EFI outboards produced between 2000 and 2014.

Which engines and years does this oil tank fit?

This oil tank is designed for Mercury/Mariner models equipped with oil-injection systems. It covers many Optimax and EFI outboard engines produced from model years 2000 through 2014 across multiple horsepower ratings.

• Compatible HP: 110, 115, 135, 150, 175, 200, 225, 240
• Listed OEM/alternate numbers: 1200-8M0063190, 833069T9, 833069T6
• Intended for Optimax, EFI, Sportjet, and Pro XS series within stated years
• Always cross-check with your engine’s parts manual or dealer before purchase

How straightforward is installation and what should I inspect?

Installation is typically a bolt-on swap for the original oil reservoir on compatible engines. Basic mechanical ability and routine hand tools are usually sufficient, but confirm hose routing and fittings match your machine before starting.

• Inspect mounting points, hose connections, and vent/overflow routing
• Verify gasket or seal condition and replace if brittle or missing
• Prime or bleed the oil system per manufacturer procedure after install
• Keep replacement screws and clamps rated for marine environments

What materials, warranty, and quality assurances come with this tank?

The jetunit oil tank is manufactured to meet OEM form and fit expectations and is offered with a seller-backed limited warranty. Materials are selected for fuel/oil resistance and marine durability, and jetunit provides customer support for post-sale issues.

• Sold with a 1-year warranty against defects
• Constructed from oil-resistant, marine-grade plastics and fittings
• OEM numbers included for easy cross-referencing
• Customer service promise: response within 24 hours for support

Will this cause any performance or reliability changes?

When matched correctly to your engine, a proper replacement tank restores original oil delivery characteristics and should not change engine performance. Replacing a degraded or leaking tank can prevent oil starvation and indirect damage to internal components.

• Restores factory oil delivery when installed and bled correctly
• Prevents leaks that can foul ignition components or exhaust systems
• Matches OEM mounting and hose ports to preserve system integrity
• Follow service manual procedures to avoid air pockets or misfeeds

Who is this for: Boat owners, marine technicians, and DIYers who operate or service Mercury/Mariner Optimax and EFI outboards from 2000–2014 and need a reliable replacement oil reservoir. Choose this jetunit assembly when your OEM tank shows cracks, leaks, or degraded fittings and when the OEM numbers 1200-8M0063190, 833069T9, or 833069T6 match your engine’s parts list. Always verify compatibility with your engine model and consult a dealer or mechanic if you’re unsure about fitment or installation steps.