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Engine:
Years:

Engine

Years

Serial #

Mercruiser Belt #

Serpentine Belt

4.3L Alpha 1996-1999 OF803000-OL618999 57-807755-5 18-15113 (4)
4.3L Alpha 1996-1999 OF803000-OL618999 57-861758 18-15116 (2,6)
4.3L Alpha 1996-1999 OF803000-OL618999 57-861759 18-15117 (2,5)
4.3L Alpha 2000-2004 L619000 & up 57-863876 4 18-15101 (3,6,7)
4.3L Alpha 2000-2004 OL619000 & up 57-863876 8 18-15104 (4,5,7)
4.3L Alpha 2000-2004 OL619000 & up 57-863876 9 18-15105 (4,6,7)
4.3L Bravo 1996-1999 OF803000-OL618999 57-861049 18-15114 (2,5)
4.3L Bravo 1996-1999 OF803000-OL618999 57-861757 18-15115 (2,6)
4.3L Bravo 2000-2004 OL619000 & up 57-863876 8 18-15104 (4,7)
5.0L Bravo 2002-2004 OM600000 & up 57-863876 6 18-15102 (3,5,7)
5.0L Alpha 1998-1999 OL012052-OL618999 57-807755-5 18-15113 (4,6)
5.0L Alpha 1998-1999 OL012052-OL618999 57-861049 18-15114 (5)
5.0L Alpha 1998-1999 OL012052-OL618999 57-861758 18-15116 (2,6)
5.0L Alpha 2000-2004 OL619000 & up 57-863876 4 18-15102 (3,6,7)
5.0L Alpha 2002-2004 OM600000 & up 57-863876 6 18-15102 (3,5,7)
5.0L Alpha 2001-2004 OL619000 & up 57-863876 8 18-15104 (4,5,7)
5.0L Alpha 2000-2004 OL619000 & up 57-863876 9 18-15105 (4,6,7)
5.0L Bravo 1998-1999 OL012052-OL618999 57-861049 18-15114 (2,5)
5.0L Bravo 1998-1999 OL012052-OL618999 57-861757 18-15115 (2,6)
5.0L Bravo 2000-2004 OL619000 & up 57-863876 8 18-15104 (4,7)
350 Mag, Alpha 1997-2004 OK001501-OL618999 57-807755-5 18-15113 (4,6)
350 Mag, Alpha 1997-2004 OK001501-OL618999 57-861049 18-15114 (2,5)
350 Mag, Alpha 1997-2004 OK001501-OL618999 57-861758 18-15116 (2,6)
350 Mag, Alpha 2000-2004 OL619000 & up 57-863876 4 18-15103 (3,6,7)
350 Mag, Alpha 2002-2004 OM600000 & up 57-863876 6 18-15102 (3,5,7)
350 Mag, Alpha 2000-2004 OL619000 & up 57-863876 8 18-15104 (4,5,7)
350 Mag, Alpha 2000-2004 OL619000 & up 57-863876 9 18-15105 (4,6,7)
350 Mag, Bravo 1997-2004 OK001501-OL618999 57-861049 18-15114 (2,5)
350 Mag, Bravo 1997-2004 OK001501-OL618999 57-861757 18-15115 (2,6)
350 Mag, Bravo 2002-2004 OM600000 & up 57-863876 6 18-15102 (3,5,7)
350 Mag, Bravo 2000-2004 OL619000 & up 57-863876 8 18-15104 (4,7)
5.7L Alpha 1997-1999 OK001506-OL618999 57-807755-5 18-15113 (4,6)
5.7L Alpha 1997-1999 OK001501-OL618999 57-861049 18-15114 (2,5)
5.7L Alpha 1997-1999 OK001506-OL618999 57-861758 18-15116 (2,6)
5.7L Alpha 2000-2004 OL619000 & up 57-863876 4 18-15104 (3,6,7)
5.7L Alpha 2002-2004 OM600000 & up 57-863876 6 18-15102 (3,5,7)
5.7L Alpha 2000-2004 OL619000 & up 57-863876 8 18-15104 (4,5,7)
5.7L Alpha 2000-2004 OL619000 & up 57-863876 9 18-15105 (4,6,7)
5.7L Bravo 1997-1999 OK001506-OL618999 57-861049 18-15114 (2,5)
5.7L Bravo 1997-1999 OK001506-OL618999 57-861757 18-15115 (2,6)
5.7L Bravo 2002-2004 OM600000 & up 57-863876 6 18-15102 (3,5,7)
5.7L Bravo 2000-2004 OL619000 & up 57-863876 8 18-15104 (4,7)
5.7L Ski 1997-2002 K040004-M316999 57-807755 4 18-15112
377 Scorpion MCM 1999-2004 OL416146 & up 57-861757 18-15115
377 Scorpion Ski 1997-1998 K000656 & up 57-807755 4 18-15112
454 Mag MPI 1998-2001 OL010029-OM024999 57-861049 18-15114 (1)
454 Mag MPI 1998-2001 OL010029-OM024999 57-863876 6 18-15102 (2)
454 Mag MPI 1998-2001 OL010029-OM024999 57-863876 7 18-15103 (4)
454 Mag MPI Horizon MIE 1998-2001 OL002200-OL674000 57-863876 7 18-15103
496 Mag & HO 2000-2004 OM025000 & up 57-863876 1 18-15119
500 EFI 1999-2004 L001477 & up 57-807755 4 18-15112
502 Mag MPI 1998-2001 OL017000-OM024999 57-861049 18-15114 (1)
502 Mag MPI 1998-2001 OL017000-OM024999 57-863876 7 18-15103 (4)
502 Mag. MPI 1998-2001 OL017000-OM024999 57-863876 6 18-15102 (2)
525 EFI 2003-2004 OM900146 & up 57-863876 2 18-15120
575 Sci 2000-2004 OL306696 & up 57-807755 4 18-15113
7.4L MPI 1998-2001 OL010003-OM024330 57-861049 18-15114 (1)
7.4L MPI 1998-2001 OL010003-OM024330 57-863876 6 18-15102 (2)
7.4L MPI 1998-2001 OL010003-OM024330 57-863876 7 18-15103 (4)
7.4L MPI MIE 1998-2001 OL002006-OM025999 57-863876 7 18-15103
Black Scorpion Ski 1997-2001 K040001-M391599 57-807755 4 18-15112
MX 6.2L Blk Scorpion Ski 2001 L670015-M391599 57-807755 4 18-15112
MX 6.2L MPI 2002-2004 OM600000 & up 57-863876 6 18-15102 (3,5)
MX 6.2L MPI 2000-2004 OL680003 & up 57-863876 8 18-15104 (4,7)
MX 6.2L MPI Horizon 2002-2004 OM600000 & up 57-863876 6 18-15102 (3)
MX 6.2L MPI Horizon 2001-2004 OM300000 & up 57-863876 8 18-15104 (4)
MX 6.2L MPI Horizon MIE 2001 M300000-M310099 57-807755 4 18-15112
MX 6.2L MPI MIE 1999-2001 L670000-M310099 57-807755 4 18-15112
8.1S MPI MIE & HO 2000-2004 OM025000 & up 57-863876 2 18-15120
8.2L MPI MIE 1998-2001 OL002450-OL674200 57-863876 7 18-15103

Engine

Years

Serial #

Mercruiser Belt #

Serpentine Belt

Notes:
  • (1) : Use with plastic 4-3/4" dia. p/s pump pulley
  • (2) : Use with metal 5-3/4" dia p/s pump pulley
  • (3) : For engines with power steering
  • (4) : For engines without power steering
  • (5) : For engines with closed cooling
  • (6) : For engines with standard cooling
  • (7) : Engines with high mounted alternators
Refine Parts List
Engine:
Years:
Your Price: $117.71
Save: $34.78
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Part # 18-15100 2nd Day Air for $2 More Eligible
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26/32" Width, 52" Length

Replaces OEM part #
  • MERCURY MARINE 57-863876 3
Your Price: $65.28
Save: $35.43
(35% Off $100.71)
Part # 18-15101 2nd Day Air for $2 More Eligible
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26/32" Width, 37" Length

Replaces OEM part #
  • MERCURY MARINE 57-863876 4
Belt Application
  • 4.3L Alpha (2000-04), Serial # OF803000-OL618999
    For engines with power steering, standard cooling, and high mounted alternators
Your Price: $118.18
Part # 18-15102 2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 11 hrs 58 mins.
Hurry! Only 1 left in stock
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Replaces OEM part #
  • MERCURY MARINE 57-863876 6
Belt Application
  • 5.0L Bravo (2002-04), Serial # OM600000 & Up
    For engines with power steering, closed cooling, and high mounted alternators
  • 5.0L Alpha (2000-04), Serial # OL619000 & Up
    For engines with power steering, standard cooling, and high mounted alternators
  • 5.0L Alpha (2002-04), Serial # OM600000 & Up
    For engines with power steering, closed cooling, and high mounted alternators
  • 350 Mag, Alpha (2002-02), Serial # OM600000 & Up
    For engines with power steering, closed cooling, and high mounted alternators
  • 350 Mag, Bravo (2002-04), Serial # OM600000 & Up
    For engines with power steering, closed cooling, high mounted alternators
  • 5.7L Alpha (2002-04), Serial # OM600000 & Up
    For engines with power steering, closed cooling, and high mounted alternators
  • 5.7L Bravo (2002-04), Serial # OM600000 & Up
    For engines with power steering, closed cooling, and high mounted alternators
  • 454 Mag MPI (1998-01), Serial # OL010029-OM024999
    Use with metal 5-3/4" dia. p/s pump pulley
  • 502 Mag. MPI (1998-01), Serial # OL017000-OM024999
    Use with metal 5-3/4" dia. p/s pump pulley
  • 7.4L MPI (1998-01), Serial # OL010003-OM024330
    Use with metal 5-3/4" dia p/s pump pulley
  • MX 6.2L MPI (2002-04), Serial # OM600000 & Up
    For engines with power steering, and closed cooling
  • MX 6.2L MPI Horizon (2002-04), Serial # OM600000 & Up
    For engines with power steering
Your Price: $97.13
Save: $60.26
(38% Off $157.39)
Part # 18-15115 2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 11 hrs 58 mins.
Hurry! Only 1 left in stock
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Replaces O.E.#
  • Mercury Marine 57-861757
Belt Application
  • 4.3L Bravo (1996-99), Serial # OF803000-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, for engines with standard cooling
  • 5.0L Bravo (1998-99), Serial # OL012052-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, for engines with standard cooling
  • 350 Mag, Bravo (1997-04), Serial # OK001501-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, for engines with standard cooling
  • 5.7L Bravo (1997-99), Serial # OK001506-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, for engines with standard cooling
  • 377 Scorpion MCM (1999-04), Serial # OL416146 & Up
Your Price: $88.20 (Out of stock)
Save: $11.79
(11% Off $99.99)
Part # 18-15114 2nd Day Air for $2 More Eligible
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Replaces O.E.#
  • Mercury Marine 57-861049
Belt Application
  • 4.3L Bravo (1996-99), Serial # OF803000-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, for engines with closed cooling
  • 5.0L Alpha (1998-99), Serial OL012052-OL618999
    For engines with closed cooling
  • 5.0L Bravo (1998-99), Serial # OL012052-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, for engines with closed cooling
  • 350 Mag, Alpha (1997-04), Serial # OK001501-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, For engines with closed cooling
  • 350 Mag, Bravo (1997-04), Serial # OK001501-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, for engines with closed cooling
  • 5.7L (1997-99), Serial # OK001501-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, For engines with closed cooling
  • 5.7L Bravo (1997-99), Serial # OK001506-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, For engines with closed cooling
  • 454 Mag MPI (1998-01), Serial # OL010029-OM024999
    Use with plastic 4-3/4" dia. p/s pump pulley
  • 502 Mag MPI (1998-01), Serial # OL017000-OM024999
    Use with plastic 4-3/4" dia. p/s pump pulley
  • 7.4L MPI (1998-01), Serial # OL010003-OM024330
    Use with plastic 4-3/4" dia. p/s pump pulley
(Out Of Stock)
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Save: $14.75
(14% Off $99.99)
Part # 18-15104 2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 11 hrs 58 mins.
Hurry! Only 1 left in stock
Replaces OEM Part#
  • Mercury Marine 57-863876 8
  • Mercury Marine 57-863876 4
Belt Application
  • 4.3L Alpha (2000-04), Serial # OL619000 & Up
    For engines without power steering, with closed cooling, and high mounted alternators
  • 4.3L Bravo (2000-04), Serial # OL619000 & Up
    For engines without power steering, and with high mounted alternators
  • 5.0L Alpha (2001-04), Serial # OL619000 & Up
    For engines without power steering, with closed cooling, and with high mounted alternators
  • 5.0L Bravo (2000-04), Serial # OL619000 & Up
    For engines without power steering, and with high mounted alternators
  • 350 Mag, Alpha (2000-04), Serial # OL519000 & Up
    For engines without power steering, with closed cooling, and with high mounted alternators
  • 350 Mag, Bravo (2000-04), Serial # OL619000 & Up
    For engines without power steering, and with high mounted alternators
  • 5.7L Alpha (2000-04), Serial # OL619000 & Up
    For engines with power steering, standard cooling, and high mounted alternators
  • 5.7L Alpha (2000-04), Serial # OL619000 & Up
    For engines without power steering, with closed cooling, and with high mounted alternators
  • 5.7L Bravo (2000-04), Serial # OL619000 & Up
    for engines without power steering, and with high mounted alternators
  • MX 6.2L MPI (2000-04), Serial # OL680003 & Up
    For engines without power steering, and with high mounted alternator
  • MX 6.2L MPI Horizon (2001-04), Serial # OM300000 & Up
    For engines without power steering
Your Price: $75.80
Save: $40.19
(34% Off $115.99)
Part # 18-15116 2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 11 hrs 58 mins.
Hurry! Only 1 left in stock
Replaces O.E.#
  • Mercury Marine 57-861758
  • Mercury Marine 57-861758Q

Details:

  • Length: 86.75"
  • Width: 13/16"
Belt Application
  • 4.3L Alpha (1996-99), Serial # OF803000-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, For engines with standard cooling
  • 5.0L Alpha (1998-99), Serial OL012052-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, For engines with standard cooling
  • 350 Mag, Alpha (1997-04), Serial OK001501-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, For engines with standard cooling
  • 5.7L Alpha (1997-99), Serial # OK001506-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, For engines with standard cooling
Your Price: $79.46 (Out of stock)
Part # 18-15119 2nd Day Air for $2 More Eligible
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Replaces O.E.#
  • Mercury Marine 57-8623523
  • Mercury Marine 57-8638761
  • Mercury Marine 57-865615001
  • Mercury Marine 57-865615Q01
Belt Application
  • 496 Mag & HO (2000-04), Serial # OM025000 & Up
Additional Details:
  • Length: 111.25"
  • Width: 13/16"
(Out Of Stock)
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Part # 18-15117 2nd Day Air for $2 More Eligible
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Replaces O.E.#
  • Mercury Marine 57-861759
Belt Application
  • 4.3L Alpha (1996-99), Serial # OF803000-OL618999
    Use with metal 5-3/4" dia. p/s pump pulley, for engines with standard cooling
(Out Of Stock)
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Your Price: $58.71 (Out of stock)
Save: $6.78
(10% Off $65.49)
Part # 18-15105 2nd Day Air for $2 More Eligible
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Replaces O.E.#
  • 57-863876 9
Belt Application4.3L Alpha (2000-04), Serial # OL619000 & Up
For engines without power steering, with standard cooling, and with high mounted alternators
  • 5.0L Alpha (2000-04), Serial # OL619000 & Up
    For engines without power steering, with standard cooling, and with high mounted alternators
  • 350 Mag, Alpha (2000-04), Serial # OL619000 & Up
    For engines without power steering, with standard cooling, and with high mounted alternators
  • 5.7L Alpha (2000-04), Serial # OL619000 & Up
    For engines without power steering, with standard cooling, and with high mounted alternators
  • (Out Of Stock)
    Low Price Guarantee
    Your Price: $52.46 (Out of stock)
    Save: $1.80
    (3% Off $54.26)
    Part # 18-15113 2nd Day Air for $2 More Eligible
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    Replaces O.E.#
    • Mercury Marine 57-807755-5
    • Mercury Marine 57-807755 4
    Belt Application
    • 4.3L Alpha (1996-99), Serial # OF803000-OL618999
      For engines without power steering
    • 5.0L Alpha (1998-99), Serial # OL012052-OL618999
      For engines without power steering, and with standard cooling
    • 350 Mag, Alpha (1997-04), Serial # OK001501-OL618999
      For engines without power steering, and with standard cooling
    • 5.7L Alpha (1997-99), Serial # OK001506-OL618999
      For engines without power steering, and with standard cooling
    • 575 Sci (2000-04), Serial # OL306696 & Up
    (Out Of Stock)
    Low Price Guarantee
    Your Price: $84.91
    Save: $54.08
    (38% Off $138.99)
    Part # 18-15112 2nd Day Air for $2 More Eligible
    SHIPS TODAY!* if ordered in 11 hrs 58 mins.
    No Reviews  |  Write Review  |  Ask Question
    Replaces O.E.#
    • Mercury Marine 57-807755 4
    Belt Application
    • 5.7L Ski (1997-02), Serial # K040004-M316999
    • 377 Scorpion Ski (1997-98), Serial # K000656 & Up
    • 500 EFI (1999-04), Serial # L001477 & Up
    • Black Scorpion Ski (1997-01), Serial # K040001-M391599
    • MX 6.2L Blk Scorpion Ski (2001), Serial # L670015-M391599
    • MX 6.2L MPI Horizon MIE (2001), Serial # M300000-M310099
    • MX 6.2L MPI MIE (1999-01), Serial # L670000-M310099
    Your Price: $86.02 (Out of stock)
    Save: $23.97
    (21% Off $109.99)
    Part # 18-15103 2nd Day Air for $2 More Eligible
    No Reviews  |  Write Review  |  Ask Question
    Replaces O.E.#
    • Mercury Marine 57-863876 7
    • Mercury Marine 57-863876 4
    Belt Application
    • Engine 350 Mag, Alpha (2000-04), Serial # OL619000 & Up
      For engines with power steering, closed cooling, high mounted alternators
    • 454 Mag MPI (1998-01), Serial OL010029-OM024999
      For engines without power steering
    • 454 Mag MPI Horizon MIE (1998-01), Serial # OL002200-OL674000
    • 502 Mag MPI (1998-01), Serial # OL017000-OM024999
      For engines without power steering
    • 7.4L MPI (1998-01), Serial # OL010003-OM024330
      For engines without power steering
    • 7.4L MPI MIE (1998-01), Serial # OL002006-OM025999
    • 8.2L MPI MIE (1998-01), Serial # OL002450-OL674200
    (Out Of Stock)
    Low Price Guarantee
    Your Price: $88.20 (Out of stock)
    Save: $14.79
    (14% Off $102.99)
    Part # 18-15121 2nd Day Air for $2 More Eligible
    No Reviews  |  Write Review  |  Ask Question
    Replaces OEM part #
    • MERCURY MARINE 57-865615005
    • MERCURY MARINE 57-865423005
    • MERCURY MARINE 57-863876 5
    13/16" x 87.5"
    (Out Of Stock)
    Low Price Guarantee
    Your Price: $77.82
    Save: $29.17
    (27% Off $106.99)
    Part # 18-15122 2nd Day Air for $2 More Eligible
    SHIPS TODAY!* if ordered in 11 hrs 58 mins.
    No Reviews  |  Write Review  |  Ask Question
    Replaces OEM part #
    • MERCURY MARINE 57-865615010
    • MERCURY MARINE 57-863876 10
    13/16" x 86"
    Your Price: $98.41
    Save: $5.08
    (4% Off $103.49)
    Part # 18-15123 2nd Day Air for $2 More Eligible
    SHIPS TODAY!* if ordered in 11 hrs 58 mins.
    Hurry! Only 1 left in stock
    No Reviews  |  Write Review  |  Ask Question
    Replaces OEM part #
    • MERCURY MARINE 57-864639
    13/16" x 85"
    Your Price: $205.15
    Save: $6.35
    (3% Off $211.50)
    Part # 18-15124 2nd Day Air for $2 More Eligible
    SHIPS TODAY!* if ordered in 11 hrs 58 mins.
    No Reviews  |  Write Review  |  Ask Question
    Replaces OEM part #
    • MERCURY MARINE 57-881754
    1-1/16" x 55.75"
    Your Price: $216.92
    Save: $75.07
    (25% Off $291.99)
    Part # 18-15125 2nd Day Air for $2 More Eligible
    SHIPS TODAY!* if ordered in 11 hrs 58 mins.
    Hurry! Only 1 left in stock
    No Reviews  |  Write Review  |  Ask Question
    Replaces OEM part #
    • MERCURY MARINE 57-817113
    1-3/8" x 53.5"
    Sierra
    Full StarEmpty StarEmpty StarEmpty StarEmpty Star
    Based On 1 Review | Write Review
    Full StarEmpty StarEmpty StarEmpty StarEmpty Star
    The belt was the wrong size
    by William from Fort Washington, Pennsylvania on June 30, 2014
    Order the belt using the engine serial number listed on your chart and this was the wrong belt. I returned the belt several days ago and I am still waiting for my refund. I did email you the proper belt number for this engine however you have not updated your chart.
    (2 of 2 people found this review helpful)
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    Average Customer Review for Sierra 18-15116 Serpentine Belt
    Full StarFull StarFull StarFull StarFull Star
    Based On 1 Review | Write Review
    Full StarFull StarFull StarFull StarFull Star
    perfect replacement
    by Robert from Senoia, Georgia on July 09, 2014
    perfect!
    Was this review helpful?
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