GLM 816685 Alpha Shaft Housing Engine 1991-UP

( Brand: Glm ), ( Manufacturer Part Number: 816685 ), ( Part Type: Shaft Housing Engine ), ( Replaces: 18-3749, 21419 )

Review GLM Alpha Gen Shift Shaft Bell Housing 1991 Up Engine fits MERCRUISER

The GLM 816685 Mercruiser Alpha Gen Shaft Housing is a critical component of the 1991 and up Mercruiser Alpha engines. This part is designed to provide a robust and durable connection between the engine and the propeller shaft, ensuring optimal performance and reliability.

The housing is manufactured using high-quality materials, specifically engineered for marine applications. It is made from cast aluminum, which offers excellent strength and resistance to corrosion, ensuring a long service life even in the harsh marine environment.

The GLM 816685 Mercruiser Alpha Gen Shaft Housing is designed to fit Mercruiser Alpha engines with a bore size of 4.3 inches. It features a precision-machined bore, ensuring a perfect fit and seal with the engine crankshaft. The housing also includes an integrated oil seal, which helps prevent oil leaks and maintain the necessary lubrication for the propeller shaft.

This housing is also designed to accommodate various types of propeller shafts, including those with different diameter keys and splines. It comes with multiple keyway options, including 1-3/4 inch, 1-5/8 inch, and 2 inch keys, as well as various spline options. This versatility makes it a popular choice for boat owners and repair shops with a variety of Mercruiser Alpha engines and shaft setups.

The GLM 816685 Mercruiser Alpha Gen Shaft Housing is a direct replacement part and is designed to be easy to install. It comes with clear installation instructions and all necessary hardware to make the installation process as straightforward and efficient as possible. Additionally, it is backed by MerCruiser's reputation for quality and durability, giving boat owners peace of mind and confidence in their investment.

In summary, the GLM 816685 Mercruiser Alpha Gen Shaft Housing is a crucial component for any Mercruiser Alpha engine, providing a strong and reliable connection between the engine and the propeller shaft. Its high-quality construction, versatile design, and easy installation make it a popular choice among boat owners and repair shops.

Pros and Cons of Buying GLM 816685 Mercruiser Alpha Gen Shaft Housing for 1991-Up Engines

The GLM 816685 Mercruiser Alpha Gen Shaft Housing is a critical component of the Mercruiser Alpha engine, responsible for securing the engine's crankshaft and transmitting power to the propeller. When considering purchasing this part, it's essential to weigh its advantages and disadvantages to make an informed decision.

1. OEM Quality: The GLM 816685 is a genuine MerCruiser part, ensuring a perfect fit and reliable performance.

2. Durability: This shaft housing is designed to withstand the rigors of marine use, providing long-lasting service.

3. Compatibility: It is compatible with 1991-up Mercruiser Alpha engines, making it a versatile choice for various applications.

4. Availability: Being a MerCruiser part, it is widely available through marine parts retailers and dealers.

5. Warranty: Depending on the seller, the part may come with a warranty, offering peace of mind for the purchaser.

1. Cost: As a genuine OEM part, the GLM 816685 tends to be more expensive compared to aftermarket alternatives.

2. Potential for Delayed Shipping: Since it is an OEM part, it may take longer to ship than aftermarket alternatives due to the supplier's inventory levels.

3. Limited Customization: Since it is a manufacturer's part, there are no additional customization options available.

The GLM 816685 Mercruiser Alpha Gen Shaft Housing is a valuable investment for those seeking a dependable, high-quality component for their Mercruiser Alpha engine. Its durability and OEM compatibility make it a worthwhile investment, even if it comes at a higher cost compared to aftermarket alternatives. For boat owners who prioritize reliability and peace of mind, this part is an excellent choice.

Details:

Boat Inboard I/O Engine Parts. We answer questions quickly. HAZARDOUS PRODUCTS HAZMAT: 1 Carriers charge extra to ship packages with products they consider hazardous, such as oils, paints, and primers. Condition: New.

Replaces: 18-3749, 21419. Engine Maintenance Parts. Mercruiser Alpha I Gen II Shift Shaft Bell Housing 816685 1991 Up GLM Engine: Thumbnails to: PRODUCT SPECIFICATIONS: Brand. Manufacturer PN: 816685.

Alpha Gen II. Below the price of item. Boat Outboard Engine Parts.

part #: 816685 prices

• $52.25-$128.43

specifications intengster:

• for models: Mercruiser
• brand: Glm
• mpn: 816685
• part type: Shaft Housing Engine
• replaces: 18-3749, 21419

payments intengster:

• other
• credit card: Discover
• wallet: Google-pay

returns intengster:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

seller intengster:

• city: Hollywood, Florida
• # reviews: 78267
• rating: 99.5%

general intengster:

• Boat Parts > Sterndrive Motors Components > Internal Engine Parts
• condition: New

offer intengster:

• availability: In Stock
• started: May 1, 2026
• options: Ship-to-home
• sold: 0
• quantity: 2

shipping intengster:

• carrier: USPS, UPS
• service: USPS First Class, USPS Priority Mail, UPS Ground, USPS Priority Mail Express
• cost: $8.13
• type: Calculated
• class: Standard, Expedited
• transit: 7-13 Days

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