Serial 0B721206 Thru 0D805068 - Alpha Drives

Backlash Indicator 91-8M0053505
Your Price:
$23.28

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Backlash Indicator 91-8M0053505

525-91-8M0053505

Backlash Indicator 91-8M0053505

Checks the gear backlash on the Alpha drive units using 14/28 tooth count and gear housing.


Backlash Indicator Rod 91-53459
Your Price:
$16.55

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Backlash Indicator Rod 91-53459

525-91-53459

Backlash Indicator Rod 91-53459

Checks the gear backlash on the TR, TRS, MC-1, R-MR, Alpha One and Alpha One Gen II drive units.


Bearing Adaptor Installation Tool 91-18605A2
Your Price:
$404.23

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Bearing Adaptor Installation Tool 91-18605A2

525-91-18605A2

Bearing Adaptor Installation Tool 91-18605A2.

Presses the reverse gear bearing adaptor into the gear housing of the Alpha One and Alpha One Gen II counter rotating gear cases.

Supersedes: 91-18605A1


Bearing Carrier Retainer Nut Wrench 91-61069T
Your Price:
$110.25

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Bearing Carrier Retainer Nut Wrench 91-61069T

525-91-61069T

Bearing Carrier Retainer Nut Wrench 91-61069T

Removes and installs the bearing carrier retainer nuts on the MC-1, R-MR, Alpha One, Alpha One Gen II and Bravo One drive units.


Bearing Cup Driver 91-33493T
Your Price:
$26.29

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Bearing Cup Driver 91-33493T

525-91-33493T

Bearing Cup Driver 91-33493T

Installs the upper drive shaft bearing cup in the drive shaft housing of the MC-1, R-MR and Alpha One drive units


Bearing Cup Driver 91-34379T
Your Price:
$23.99

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Bearing Cup Driver 91-34379T

525-91-34379T

Bearing Cup Driver 91-34379T

Installs the drive shaft bearing cup in gear the housing of the MC-1, R-MR and Alpha One drive units


Bearing Cup Driver 91-36577T
Your Price:
$27.24

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Bearing Cup Driver 91-36577T

525-91-36577T

Bearing Cup Driver 91-36577T

Installs the forward gear bearing cup in the gear housing of the MC-1, R-MR, Alpha One and Alpha One Gen II with bearing cup diameter of 3.500 in. 89 outside diameter (O.D.)


Bearing Cup Driver 91-38918T
Your Price:
$19.95

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Bearing Cup Driver 91-38918T

525-91-38918T

Bearing Cup Driver 91-38918T

Installs the bearing cup in the top cover of the drive shaft housing of the MC-1, R-MR and Alpha One drive units.


Bearing Cup Driver 91-808053T
Your Price:
$23.35

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Bearing Cup Driver 91-808053T

525-91-808053T

Bearing Cup Driver 91-808053T

Use to install a new smaller outside diameter top cover bearing on the Alpha One Gen II drive units.


Bearing Driver 91-32325T
Your Price:
$42.51

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Bearing Driver 91-32325T

525-91-32325T

Bearing Driver 91-32325T

Installs the gimbal bearing in the MC-1, R-MR, Alpha One, Alpha One Gen II, Blackhawk and all Bravo drive units. Use with 91-30366T1 Gimbal Bearing Installation Collar Number 3.


Bearing Driver 91-33489
Your Price:
$18.36

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Bearing Driver 91-33489

525-91-33489

Bearing Driver 91-33489

Installs the small roller bearing in the gimbal housing of the MC-1, R-MR and Alpha One drive Units.


Bearing Installation Tool 91-38628T
Your Price:
$28.74

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Bearing Installation Tool 91-38628T

525-91-38628T

Bearing Installation Tool 91-38628T

Installs the pinion bearing on the MC-1, R-MR and Alpha One drive units.


Bearing Retainer Wrench 91-17256
Your Price:
$94.73

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Bearing Retainer Wrench 91-17256

525-91-17256

Bearing Retainer Wrench 91-17256

Removes and installs the drive shaft bearing retainer on the MC-1, R-MR, all Alpha drive units, Blackhawk and all Bravo (excludes Bravo X Series) drive units.


Belleville Washer 12-54048
Your Price:
$4.54

Belleville Washer

615-525-12-54048

Belleville Washer

  • Available: (1) One

Use with the 91-61067A3 Pinion Nut Adaptor and a propeller nut to check the reverse gear lash on the MC-1, R-MR, Alpha One and Alpha One Gen II drive units.


Bellows Expander Tool
Your Price:
$47.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Bellows Expander Tool

676-9-79811

Bellows Expander Tool
Replaces: Mercury Marine 91-45497A1.
Installs exhaust bellows On: MC-I, R-MR, Alpha I, Bravo I and II and Blackhawk drive units.


Bellows Expander Tool 91-45497A1
Your Price:
$41.99

Bellows Expander Tool 91-45497A1

700-90360

Bellows Expander Tool replaces MerCruiser part # 91-45497A1

Scissor handle with vinyl grip & opens with screw lock

Installs exhaust bellows on MC-1 / R / MR / Alpha One / Alpha One Gen II, Bravo, & Blackhawk drive units


Bushing Installation Tool 91-805057A2
Your Price:
$26.29

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Bushing Installation Tool 91-805057A2

525-91-805057A2

Bushing Installation Tool 91-805057A2

Installs the shift shaft upper bushings in the R-MR, Alpha One and earlier models of the Alpha One Gen II transom assembly.


Dial Indicator 91-58222A1
Your Price:
$170.33

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Dial Indicator 91-58222A1

525-91-58222A1

Dial Indicator 91-58222A1

Measures gear the backlash on all drive units. Measures various distances on diesel engines.


Dial Indicator Adaptor Kit 91-83155
Your Price:
$80.35

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Dial Indicator Adaptor Kit 91-83155

525-91-83155

Dial Indicator Adaptor Kit 91-83155

Attaches the dial indicator to the gear case when checking backlash on MC-1, R-MR, Alpha One Gen II, Bravo One, Bravo Two and Bravo Three drive units.


Dial Indicator Holding Tool 91-89897
Your Price:
$23.59

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Dial Indicator Holding Tool 91-89897

525-91-89897

Dial Indicator Holding Tool 91-89897

Secures the dial indicator to gear housing when checking backlash on the TR, TRS, MC-1, R-MR and Alpha One drive units.