Mercury 205 Outboard Lower Unit (90-205)

The Mercury 205 Outboard Lower Unit (90-205) is a premium-quality marine component engineered for unmatched durability and performance. Perfectly designed for compatibility with a wide range of engines, it ensures reliability in both recreational and professional boating.

SUPERIOR QUALITY: Mercury 205 outboard lower unit offers the best products at affordable prices. We assure you that our products are of superior quality and brilliantly polished with a seamless design.

GREAT PERFORMANCE: Mercury 205 lower units are manufactured with high-quality materials resulting in better performance and efficiency. As a result, it can perform even in the most extreme water conditions.

MUST CHECK: Lower unit mercury 205 is an excellent product. Before buying this, you have to verify some specifications of your engine such as Lower units gear ratio, engine type, two-stroke carb, DFI (Direct Fuel Injection), or 4-stroke and shaft length.

SHAFT LENGTH: Mercury 205 lower unit is an efficient lower unit. Before ordering, you must verify your shaft length. Your model # can tell you the shaft size. An L is a 20″, and an XL is a 25″. There is also an LL model, which is a 22.5 Inch Shaft. We do not offer this shaft size.

SUITABLE FOR: Mercury 205 lower unit is perfect for most 3 & 4 Cylinder 2-Stroke 1987 and newer 70-125 HP engine also fits most of the 75-115 HP 4-Stroke below Serial #OT801000. And this unit will also work with a 4-1/4 bullet diameter.

DOSEN’T FIT FOR: Mercury 205 outboard lower unit will not fit the model with a plastic water pump housing and three jaws lower unit unless you change the shift shaft in the midsection.

Mercury 205 Outboard Lower Unit Features:

• • Replaces most 3&4 Cylinder 2-Stroke 1987 and newer 70-125 HP

• • Also replaces most 75-115 HP 4-Stroke below Serial #OT801000.
  • This unit will not replace a 3 jaw lower unit unless you also change the shift shaft in the midsection.

• • This unit will only work if you have a 4-1/4 bullet diameter.

• • This unit will not replace models with a plastic water pump housing.

• • You must verify your Gear Ratio. See Table 1 Below

• • 2.31 ratio is no longer available. 2.33 is the proper replacement.

• • You must verify your engine type, Two Stroke Carb, DFI (Direct Fuel Injection), or 4-stroke.

• • You must verify your shaft length. See Figure 1 below.

• • Your model # can also tell you the shaft size. An L is a 20″ and an XL is a 25″. If in doubt, please verify.
  • There is also an LL model which is a 22.5 Inch Shaft. We do not offer this shaft size.

Table 1(Below):

Figure 1(Below):

Why Pick the Mercury 205 Outboard Lower Unit (90-205)?

The Mercury 205 Outboard Lower Unit (90-205) is renowned for its exceptional durability and performance, even in extreme water conditions. Its precision engineering ensures seamless compatibility with various engines, offering superior efficiency. Crafted from high-quality materials, it guarantees long-lasting reliability and a polished, professional appearance.

Where to Use the Mercury 205 Outboard Lower Unit (90-205)?

The Mercury 205 Outboard Lower Unit (90-205) is perfect for recreational boating, professional fishing, and other marine applications. Designed to fit most 3 & 4 Cylinder 2-Stroke and select 4-Stroke engines, it performs effectively in both freshwater and saltwater conditions. Its robust design ensures reliability in demanding marine environments.

Tips for Maintenance

To maintain the Mercury 205 Outboard Lower Unit (90-205), inspect it regularly for signs of wear, especially in the gear oil and seals. Flush the unit with fresh water after each use, particularly when used in saltwater, to prevent corrosion. Schedule routine servicing to keep it performing at its best and prolong its lifespan.