Description
Genuine replacement Mercury Oil Cap Assembly 8M0142290 for 3.4L V6, 4.6L V8 and 5.7L V10 outboards.
- Genuine replacement Mercury Oil Cap Assembly 8M0142290 for 3.4L V6, 4.6L V8 and 5.7L V10 outboards.
- Fits the following Mercury outboards: 175-225hp 3.4L V6 FourStroke (2B529482 & up), 200-300 4.6L V8 FourStroke (2B529482 & up)and 350-425 5.7L V10 FourStroke (3B266064 & up).
- Also fits Mercury Racing 3.4L V6, 4.6L V8 and 5.7L V10 150R-500R outboards
- Contains cap with O-Ring installed
- Cap is made of a polyamide resin
- Material tested for durability and longevity in tough marine environments
- Mercury parts and accessories are backed by decades of experience in engineering, testing and manufacturing to provide the best fit, function and performance


![Markdown Shakespeare 5215 3‘ Stainless Steel Whip Antenna [5215]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/markdown-shakespeare-5215-3-stainless-steel-whip-antenna-5215.webp)
![One Day Deal Lectrotab Actuator Upper Bracket [BU]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/one-day-deal-lectrotab-actuator-upper-bracket-bu.webp)

![Blue Sea 8361 AC Rotary Switch Panel 65 Ampere 3 Positions + OFF, 3 Pole [8361] Top Pick](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/blue-sea-8361-ac-rotary-switch-panel-65-ampere-3-positions-off-3-pole-8361-top-p.webp)
![Top Rated Blue Sea 8358 AC Rotary Switch Panel 30 Ampere 3 Positions + OFF, 2 Pole [8358]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/top-rated-blue-sea-8358-ac-rotary-switch-panel-30-ampere-3-positions-off-2-pole-.webp)
![Certified Jabsco Joker Valve [29092-1000]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/certified-jabsco-joker-valve-29092-1000.webp)

![Flash Sale Blue Sea 8299 Contura Switch Actuator – Grey – No Lens [8299]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/flash-sale-blue-sea-8299-contura-switch-actuator-grey-no-lens-8299.webp)