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1991 Mercruiser 250BM21DS INTAKE MANIFOLD AND FRONT COVER(DESIGN I) Diagram and Parts

Manufacturer:
Catalog:
Year:
1991
Model:
250BM21DS
Component:
INTAKE MANIFOLD AND FRONT COVER(DESIGN I)
Serial Number:
#
Description
MSRP/Price
Req.
Qty
 
#
Description
MSRP/Price
Req.
Qty
 
  • 1

    MANIFOLD, Intake

    (4 BARREL)

    17618

    $914.58
    1
  • 1

    MANIFOLD, Intake

    (2 BARREL)

    17619

    $566.39
    1
  • 1

    MANIFOLD, Intake

    (4 BARREL - HI-RISE)

    17620

    $757.20
    1
  • 2

    SCREW, (.375-16 x .875)

    (3/8-16 X 7/8 IN.)

    806681

    $5.30
    $3.73
    9
     
    Add To Cart
  • 2

    BOLT

    (3/8-16 X 1-1/4 IN.)

    11975

    $2.60
    $1.83
    3
     
    Add To Cart
  • 3

    POINTER

    75435A 1

    $18.92
    $15.34
    1
     
    Add To Cart
  • 4

    LIFTING EYE

    47512

    $22.60
    1
  • 5

    SCREW, (.375-16 x 1.50)

    34354

    $1.60
    $1.13
    1
     
    Add To Cart
  • 6

    Not Sold Separate, STUD (GM#3959544)

    N.S.S.

    $0.00
    4
  • 7

    GUARD

    72647

    $12.60
    1
  • 8

    GASKET SET

    (Use RTV Silicone Sealant for end gasket - See Service Manual)

    17145

    $44.00
    $35.68
    1
     
    Add To Cart
  • 9

    PUMP ASSEMBLY, Water

    17437

    $153.50
    $124.46
    1
     
    Add To Cart
  • 10

    GASKET

    34897

    $2.70
    $1.90
    2
     
    Add To Cart
  • 11

    SCREW, (.375-16 x 1.750)

    32132

    $2.10
    $1.48
    2
     
    Add To Cart
  • 11

    SCREW, (.375-16 x 2.750)

    47688

    $2.50
    $1.76
    1
     
    Add To Cart
  • 11

    SCREW (1-1/2 IN.)

    52200

    $9.09
    1
  • 12

    PULLEY (3 GROOVE)

    15120T

    $342.85
    1
  • 13

    SCREW, (.312-24 x .750)

    47277

    $0.80
    $0.56
    4
     
    Add To Cart
  • 14

    LOCKWASHER, (.312)

    39107

    $1.00
    $0.70
    4
     
    Add To Cart
  • 15

    BALANCER

    75420

    $362.16
    $293.65
    1
     
    Add To Cart
  • 16

    PULLEY (2 GROOVE)

    (See Note)

    33863

    $111.33
    1
  • 18

    BOLT

    72626

    $4.38
    1
  • 19

    LOCKWASHER, (.437)

    39131

    $0.80
    $0.56
    1
     
    Add To Cart
  • 20

    WASHER

    35332

    $8.10
    $5.70
    1
     
    Add To Cart
  • 21

    SCREW, (.375-24 x .875)

    (W/O POWER STEERING)

    34352

    $0.80
    $0.56
    3
     
    Add To Cart
  • 21

    SCREW, (.375-24 x 1.00)

    (WITH POWER STEERING)

    35786

    $2.70
    $1.90
    3
     
    Add To Cart
  • 22

    LOCKWASHER, (.375)

    35048

    $0.90
    $0.63
    3
     
    Add To Cart
  • 23

    BELT (44 IN.)

    49213A 1

    $32.30
    $22.75
    1
     
    Add To Cart
  • 24

    SUPPORT

    USE WHERE APPLICABLE

    35365

    $4.65
    2
  • 25

    SCREW, (.250-20 x .563)

    USE WHERE APPLICABLE

    35366

    $9.00
    $6.34
    2
     
    Add To Cart
  • 26

    COVER

    14249A 2

    $170.75
    $138.45
    1
     
    Add To Cart
  • 27

    SEAL, Oil

    97335

    $36.80
    $25.92
    1
     
    Add To Cart
  • 28

    GASKET

    14250

    $4.60
    $3.24
    1
     
    Add To Cart
  • 29

    SCREW, (.250-20 x .563)

    35366

    $9.00
    $6.34
    10
     
    Add To Cart
  • 31

    VALVE ASSEMBLY, Filter

    W/O REMOTE OIL FILTER

    53338

    $71.67
    $58.11
    1
     
    Add To Cart
  • 32

    SCREW, (.312-18 x 1.250)

    W/O REMOTE OIL FILTER

    54786

    $2.40
    $1.69
    2
     
    Add To Cart
  • 33

    FILTER, Oil

    W/O REMOTE OIL FILTER

    14957

    $7.61
    1
     
    Add To Cart
  • 34

    RETAINER, Oil Seal (REAR)

    14239

    $185.58
    $150.47
    1
     
    Add To Cart
  • 35

    GASKET

    14241

    $9.58
    1
     
    Add To Cart
  • 36

    SEAL, Oil (REAR)

    14240

    $31.90
    1
  • 37

    BOLT, (.250-20 x 1.750)

    14243

    $4.10
    $2.89
    1
     
    Add To Cart
  • 38

    BOLT, (.250-20 x .875)

    14242

    $20.90
    $14.72
    2
     
    Add To Cart
  • 39

    PIN, Dowel

    14263

    $4.70
    $3.31
    1
     
    Add To Cart
  • 40

    NUT

    11996

    $14.30
    $10.07
    1
     
    Add To Cart
  • 41

    STUD, (.250-20 x 2.180)

    14827

    $15.50
    $10.92
    1
     
    Add To Cart
  • 42

    SET SCREW, (.312-18 x .312)

    49011

    $0.47
    4
* To comply with Mercury policy, Boats.net will not ship OEM Mercury parts outside of the United States.
* Pricing applies to Internet orders only. Required numbers shown are quantities used per whole assembly. Prices are based on a quantity of one (Each). You order one, you get one. Order the quantities needed for your repair.