Mercury MerCruiser Service Manuals Engines, Sterndrive, Outdrive, Jet Drive

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How to Identify what MerCruiser, Alpha or Bravo outdrive you have.

Mercury MerCruiser Outdrives and Sterndrives

Alpha Generation 1 model production began in 1983 and ran through 1990. The Serial Number Range for these models ranged from 6225577 Thru 0D469858

MerCruiser Alpha Outdrives

• Alpha One Generation 1 Outdrive 1984-1992
• Alpha One Generation 2 Outdrive 1992+

Alpha Generation 2 model was introduced in 1991 and is currently still in production. The Alpha Generation 2 models have been broken into several different Serial Number Ranges as follows:

• 1991 thru 1995 – 0D469859 Thru 0F679999
• 1996 thru 1997 – 0F680000 Thru 0K999999
• 1998 and Up – 0L100040 And Up

Bravo 1: With a focus on high speed performance, the Bravo 1 sterndrive is used for single, twin or triple engine applications and can produce speed up over 100 mph for gas engines up to 600 HP. In addition to triple-digit speeds, the exclusive performance torpedo design and dual water pickups allow the Bravo 1 to handle high and low speeds well.

Bravo 2: The Bravo 2 sterndrive is designed for twin engine applications and can power a boat up to 55 mph for gas engines up to 450 HP. With a wide gear case, the Bravo 2 is able to accommodate a propeller up to 20” in diameter that propels a boat on plane faster and improves fuel economy.

Bravo 3: MerCruiser Bravo 3 outdrives feature counter-rotating dual propellers that improve propulsion efficiency, speed, acceleration and handling on a boat. The two props are mounted in front of one another and turn in opposite directions eliminating wasted energy from the propeller wash. The Bravo 3 is available in a single or twin engine application and is capable of speeds up to 65 mph for gas engines up to 525 HP.

MerCruiser Bravo Sterndrives

• Bravo 1 Sterndrive
  • Bravo One
  • Bravo One X
  • Bravo One XR
• Bravo 2 Sterndrive
  • Bravo Two
  • Bravo Two X
  • Bravo Two XR
• Bravo 3 Sterndrive
  • Bravo Three
  • Bravo Three X
  • Bravo Three XR

MerCruiser Blackhawk Surface Drive

The Blackhawk basically has the bravo 1 upper gears and bravo 3 lower gears/propeller shafts, etc. with a shorter vertical shaft in a one piece case. The Blackhawk drive is about eight inches shorter and can be mounted almost 2 3/4 inches above a standard Bravo. The two props maintain the bite at this height, but it takes a good engine to turn all that blade area at idle.

Mercury MerCruiser Service Manuals Directory

MerCruiser Sterndrive Service Manuals Directory Check List

MerCruiser Engine & Sterndrive Manuals

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MerCruiser Engines & Sterndrive Manuals # 1-48

MerCruiser Inboard/Outdrive Model Identification Guide

How to Locate Your MerCruiser Serial Number Tags

• Engine Serial Number: The serial number tag is located near the starter, by the flywheel housing; or, on the rocker arm or flame arrestor cover.
• Transom Plates: The serial number tag is located on the inner transom plate inside the boat; or, on the upper swivel pin.
• Sterndrive Serial Number (separate from engine): The serial number tag is located on the upper drive shaft housing (starboard side or on the back of the housing).

With the serial number located using information above, you can then use the chart below to identify your MerCruiser Engine/Sterndrive model.

MerCruiser Model Number Chart