Description
Mercury 8M0180306 Torpedo Cover
Mercury 8M0180306 is a genuine torpedo cover for the propeller-shaft area of select Mercury outboard gearcases. Choose this replacement by part number and the exact gear housing fitted to your engine.
Product Details
- Brand: Mercury
- Part number: 8M0180306
- Component: Torpedo cover
- Application: Select Mercury outboard propeller-shaft gear housing assemblies
- Gearcase configurations: Specified 5.44-inch torpedo and Sport Master assemblies; see applications below
Compatible Applications
Fitment is limited to the following gearcase configurations within these engine families and serial ranges:
- 200, 225, 250, 275 and 300 HP Verado 6-cylinder: 2B144123 through 2B578935; 5.44-inch torpedo, 1.75:1, counter rotation, Design II with tapered forward bearing.
- 350 HP 2.6L L6 Verado: 2B141617 through 3B342962; 5.44-inch torpedo, 1.75:1, counter rotation, Design II with tapered forward bearing.
- 350 HP 2.6L L6 Pro Verado: 2B141124 through 3B342962; the same specified 5.44-inch, 1.75:1 counter-rotation Design II configuration.
- 400 HP 2.6L L6 Verado: 2B618256 through 3B342962; the same specified 5.44-inch, 1.75:1 counter-rotation Design II configuration.
- 400R 2.6L L6 Racing: 2B141124 through 3B342962; the same specified 5.44-inch, 1.75:1 counter-rotation Design II configuration.
- 300R 4.6L V8 AMS Racing: 1E081459 and up; specified 5.44-inch torpedo 1.85:1 or Sport Master 1.60:1 propeller-shaft assemblies, standard or counter rotation.
- 400R 5.7L V10 Racing: 3B272954 and up; specified 5.44-inch torpedo 1.60:1 propeller-shaft assemblies, standard or counter rotation.
- 350 HP 5.7L V10 Verado: 3B576449 and up; specified 5.44-inch torpedo 1.75:1 propeller-shaft assemblies, standard or counter rotation.
Check Fitment Before Ordering
Verify part number 8M0180306 against your engine serial number and installed gearcase. Confirm the gear housing design, ratio and rotation; horsepower alone does not establish compatibility.

