Mercruiser GM Big Block V8 (330, 340, 7.4L) Sterndrive Exhaust Manifold Exploded View

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Mercruiser GM Big Block V8 (330, 340, 7.4L) Sterndrive Exhaust Manifold Exploded View
Mercruiser Sterndrive Exhaust Manifold Exploded View Diagram and Parts
Fits GM Big Block V8 454 cu. in.
Models 330, &7.4L
Figure #DescriptionO.E.M. #Sierra #Application
1MANIFOLD807078A6 18-1957-1GM Big Block (V8) 454 cu.in. Models 330, 340 & 7.4L. Use with 18-0418 manifold gasket; Mounting Kit: 18-8532
2ELBOW GASKET (BLOCKED)27-860231 18-0672Fits Manifold: 18-1957-1; Elbows: 18-1970-1, & 18-1976-1, 18-1974: Spacer 18-1908.
3ELBOW GASKET (OPEN)27-818832 18-2849Fits Manifold: 18-1957-1; Elbows: 18-1970-1, & 18-1976-1, 18-1974: Spacer 18-1908.
4MOUNTING STUDN/ANSSIncluded in 18-8554 mounting kit.
5MOUNTING STUDN/ANSSIncluded in 18-8529 mounting kit.
6MOUNTING BOLTN/ANSSIncluded in 18-8505 mounting kit.
7MOUNTING BOLTN/ANSSIncluded in 18-8532 mounting kit.
8MANIFOLD ELBOW98502A2 18-1974-1Fits Manifold: 18-1957-1. Use Elbow gaskets: 18-2849, 18-0897, or 18-0672; Use mounting kit: 18-8529 (Do not use with spacer)
9MANIFOLD ELBOW44354A3 18-1976-1Fits Manifold: 18-1957-1. Use Elbow gaskets: 18-2849, 18-0897, or 18-0672; Use mounting kit: 18-8505, or if spacer is included use 18-8555
10MANIFOLD ELBOW98504A3 18-1970-1Fits Manifold: 18-1957-1. Use Elbow gaskets: 18-2849, 18-0897, or 18-0672; Use mounting kit: 18-8529, or if spacer is included use 18-8554.
11HOSE FITTINGN/A18-82163/4" - 14NPT X 1" Hose (Corrosion Resistant Brass Fitting)
12HOSE FITTINGN/A 18-44613/4" - 14NPT X 1" Hose (Corrosion Resistant Brass Fitting)
13HOSE FITTINGN/A18-82153/4" - 14NPT X 3/4" Hose (Corrosion Resistant Brass Fitting)
14MANIFOLD SPACER KIT807476A6, 93320A5 18-1908K3" Riser Kit for Manifold: 18-1957-1. Includes (2) spacers, restrictor, open, & blocked gasket. All necessary mounting hardware is also included.
15MOUNTING KITN/A 18-8554Use 18-8554 Mounting Kit when 18-1908 Spacer, 18-1970-1 Elbow and 18-1974 Elbow are used together. Included in 18-1908K. Includes (1) 18-2849 & 18-0897 elbow gaskets.
16MOUNTING KITN/A 18-8555Use with Manifold Spacer: 18-1908 with Riser 18-1976-1. Included in 18-1908K. Includes (1) 18-2849 & 18-0897 elbow gaskets.
17MOUNTING KITN/A 18-8556Use with Manifold Spacer: 18-1985. Includes (1) 18-2849 & 18-0897 elbow gaskets
18MOUNTING KITN/A 18-8505Use with Riser: 18-1976-1. Includes 18-0897 elbow gasket.
19MOUNTING KITN/A 18-8529Use with Risers: 18-1970-1 & 18-1974-1. Includes 18-0897 elbow gasket.
20MOUNTING KITN/A 18-8532Use with Manifold: 18-1957-1. Includes 18-0418 manifold gasket.
21MANIFOLD GASKET96653 / 27-46820 18-0418Use with Manifold: 18-1957-1. Included in 18-8532 mounting kit.
22ELBOW GASKET (RESTRICTOR)27-41813 18-0897Fits Manifold: 18-1957-1; Manifold Spacers: 18-1985, & 18-1908; Elbows: 18-1970-1, & 18-1976-1, 18-1974
23MANIFOLD SPACER93322A12 18-19083" Spacer for Manifold: 18-1952-1. Use with mounting kit 18-8556. (Note: To mount elbows to spacer a separate mounting kit is needed)
Average Customer Review for Exhaust Elbow to Manifold Gasket - Sierra
Based On 1 Review
not funny by Gerald - Napa, CaliforniaMarch 07, 2013
I have already corresponded with you twice about how unhappy I was with the last shippment.I guess you didn't believe me or the word wasn't passed down. Now that doesn't suprise me.I did exchange a couple of futile emails with some air head that could care less about customer service.Next thing you would probably tell me is he was service all star of the year. I paid $13.00 for a three day delivery that took six or maybe seven due to factors you claim were out of your control. These small liteweight gaskets could have been sent in a regular envelope but nope they had to come in a stupid big box expensive and late at that.I will be buying more marine products in the future.I own a large cruiser and a smaller boat as you know call for continued upkeep. In the future I will not be spending another penny with your establishment. That by the way is how it works. Crappy service and some bone head that could care less giving lame excuses as to why this didn't go of as needed.Please remove any acount information you have. I will think about you when I spend however much on marine parts from someone a little more accomadating.If you find this email humorus there in may be part of the problem.
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Based On 1 Review
Review for Sierra 18-8554 Exhaust Elbow Mounting Kit by a CustomerMay 28, 2009

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BARR MC47-27-41813 replacement parts

Exhaust Elbow to Manifold Gasket - Sierra*
Sale Price: $4.49
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(32% Off $6.69)
Part # 18-0897


Part # 18-0897
Replaces OEM part #

  • MERCURY MARINE 27-41813
Used with:
    Fits Manifold: 18-1957-1, 18-1952-1, 18-1958, 18-1962
    Manifold Spacers: 18-1985, & 18-1908
    Riser: 18-1976-1, 18-1970-1, 18-1974
Included in 18-8554 mounting kit
BARR MC-20-44354 replacement parts

Part # 18-1976-1
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Part # 18-1976-1
Replaces OEM part #

  • MERCURY MARINE 44354A3
  • MERCURY MARINE 807988A2
For: most Mercruiser V-6 & V-8 applications 7° (4" O.D. Riser)
Comes with 18-0897,18-4263 & 18-4258
Use with:
    Manifold: 18-1952-1, 18-1953-1, 18-1957-1
    Riser Gasket: 18-0897 restrictor, 18-2849 open, 18-0672 blocked
    Mounting Kit: 18-8505, or if spacer is included use 18-8555
Exhaust Manifold Elbow Mounting Kit - Sierra

Exhaust Manifold Elbow Mounting Kit - Sierra*
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Part # 18-8505
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Part # 18-8505
For: Mercruiser GM V6 229 and 262cu.in. (Models 185 and 205), GM Small Block V8 305-350cu.in. (Models: 200, 228, 230, 260, 898), GM Big Block V8 454cu.in. (Models: 330, 340 and 7.4L)

Used with:

    Riser: 18-1976-1
Includes 18-0897 elbow gasket
BARR MC-47-27-41811 replacement parts

Exhaust Manifold Elbow Gasket, Blocked - Sierra*
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Part # 18-0672-9
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Part # 18-0672-9
Replaces OEM part #

  • MERCURY MARINE 27-8637251
  • MERCURY MARINE 27-860231
Package of 2
Used with:
    Riser: 18-1970-1, 18-1976-1, 18-1974
    Fits Manifold: 18-1957-1
    Spacer: 18-1908
Mercury Marine 93322 replacement parts

Exhaust Manifold Spacer - Sierra*
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Part # 18-1908
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Part # 18-1908
Replaces OEM part #

  • MERCURY MARINE 93320
For: Mercruiser GM V6 229 and 262cu.in. (Models: 185 and 205),GM Small Block V8 305-350cu.in. (Models: 200, 228, 230, 260 and 898), GM Big Block V8 454cu.in. (Models: 330, 340 and 7.4L)
Used with:
    Manifolds: 18-1952-1, 18-1953-1, 18-1957-1
Use with mounting kit 18-8556. To mount elbows to spacer a separate mounting kit is needed
BARR MC-20-98502 replacement parts

Exhaust Manifold Elbow - Sierra*
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Part # 18-1974-1
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Part # 18-1974-1
Replaces OEM part #

  • MERCURY MARINE 98502A2
For: Mercruiser V-6 & V-8 applications 0° (3" O.D. Riser)
Comes with 18-0897 gasket & brass plugs

Fits Manifold: 18-1957-1
Use Elbow Gaskets: 18-2849, 18-0897, or 18-0672
Use Mounting Kit: 18-8529 (Do not use with spacer)
Exhaust Manifold Elbow Mounting Kit - Sierra

Exhaust Manifold Elbow Mounting Kit - Sierra*
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Part # 18-8529
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Part # 18-8529
For: Mercruiser GM V6 229 and 262cu.in. (Models 185 and 205), GM Small Block V8 305-350cu.in. (Models: 200, 228, 230, 260, 898), GM Big Block V8 454cu.in. (Models: 330, 340 and 7.4L)

Used with:

    Riser: 18-1970-1 and 18-1974-1
Includes 18-0897 elbow gasket
Exhaust Manifold Mounting Kit - Sierra

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Part # 18-8532
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Part # 18-8532
For: Mercruiser GM Big Block V8 454cu.in. (Models: 330, 340 and 7.4L)

Used with:

    Manifold: 18-1957-1
Includes 18-0418 manifold gasket
Universal Hose Barbs

Hose Barb - Sierra*
Sale Price: $11.69
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Part # 18-4461
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Part # 18-4461
Replaces OEM part #

  • MERCURY MARINE 22-807155
3/4" - 14 NPT X 1" Hose
Corrosion Resistant Brass Fitting
Exhaust Manifold Mounting Kit for Mercruiser, GLM 53430 - Sierra

Exhaust Manifold Mounting Kit for Mercruiser, GLM 53430 - Sierra*
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Part # 18-8555
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Part # 18-8555
For: Mercruiser 229 and 262 ci V6, 305 and 350 SB V8, 454 Big Block V8.

Used with:

    Riser Kit: 18-1908K and 18-1908 Spacer
    Riser: 18-1970-1
    Manifolds: 18-1952-1
Includes (1) 18-2849 & 18-0897 elbow gaskets
Mercury Marine 27-863726 replacement parts

Exhaust Manifold Elbow Gasket, Open - Sierra*
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Part # 18-2849-9
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Part # 18-2849-9
Replaces OEM part #

  • MERCURY MARINE 27-818832
  • MERCURY MARINE 27-863726
  • MERCURY MARINE 27-87105-1
Package of 2
Use With:
    Manifold: 18-1957-1, 18-1952-1, 18-1958, 18-1962
    Elbow: 18-1976-1, 18-1970-1, 18-1974
    Spacer: 18-1908, 18-1985
Included in 18-8554 mounting kit
GLM 53330 replacement parts

Exhaust Manifold Elbow Mounting Kit - Sierra*
Sale Price: $35.09
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Part # 18-8554


Part # 18-8554
For: Mercruiser 229 and 262 ci V6, 305 and 350 SB V8, 454 Big Block V8.

Used with:

    Riser Kit: 18-1908K and 18-1908 Spacer
    Riser: 18-1970-1, 18-1971, 18-1978
    Manifold: 18-1952-1
    Manifold Spacer: 18-1906
Use 18-8554 Mounting Kit when 18-1908 Spacer, 18-1970-1 Elbow and 18-1974 Elbow are used together
Included in 18-1908K
Includes (1) 18-2849 & 18-0897 elbow gaskets
BARR MC-1-89011 replacement parts

Part # 18-1957-1
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Part # 18-1957-1
Replaces OEM part #

  • MERCURY MARINE 807078A 6
  • MERCURY MARINE 89011A8
Fits most Mercruiser (GM) V-8 big blocks with center riser, 454 cu.in. Models 330, 340 & 7.4L, Port & Starboard
WILL FIT EITHER SIDE
Use with:
    Exhaust Manifold Gasket: 18-0418
    Mounting Kit: 18-8532
Mercury Marine 98504A3 replacement parts

Exhaust Manifold Elbow - Sierra*
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Part # 18-1970-1
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Part # 18-1970-1
Replaces OEM part #

  • MERCURY MARINE 98504A3
For: V-6 & V-8 applications 15° (3" O.D. Riser) Comes with 18-0897 & brass plugs
Use with:
    Manifold: 18-1952-1, 18-1953-1, 18-1957-1
    Elbow Gasket: 18-0897 restrictor, 18-2849 open, 18-0672 blocked
    Mounting Kit: 18-8529 or if spacer is included use 18-8554
Crusader 96653 replacement parts

Exhaust Manifold Gasket - Sierra*
Sale Price: $10.79
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Part # 18-0418
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Part # 18-0418
Replaces OEM part #

  • CRUSADER 96653
  • BARR CHVA-47-0000
  • GM 3852472
  • MERCURY MARINE 27-46820
  • OMC 909613
  • VOLVO 3852472
Used with:
    Manifolds: 18-1957-1, 18-1982, 18-1929, 18-1933, 18-1898
Included in 18-8532 mounting kit
Exhaust Manifold Elbow Mounting Kit - Sierra

Exhaust Manifold Elbow Mounting Kit - Sierra*
Sale Price: $13.49
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(27% Off $18.49)
Part # 18-8556
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Part # 18-8556
For: 229 and 262 ci V6, 305 and 350 SB V8, 454 Big Block V8.

Used to mount:

    Spacer 18-1985 to Manifolds 18-1953-2, 18-1957-1 and 18-1952-1
Includes (1) 18-2849 & 18-0897 elbow gaskets
Mallory Gasket, Exhaust Elbow 9-61414

Mallory Gasket, Exhaust Elbow 9-61414
Sale Price: $6.99
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Part # 9-61414
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Replaces GLM #:32080
Replaces Original Equipment Manufacturer(OEM):Mercruiser
Replaces Original Equipment Manufacturer # (OEM #):27-863726
Fits Application:GM V-6 & V-8 w/center rise manifold
Mallory Gasket, Exhaust Elbow 9-61413

Mallory Gasket, Exhaust Elbow 9-61413
Sale Price: $4.99
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Part # 9-61413
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Replaces GLM #:30240
Replaces Original Equipment Manufacturer(OEM):Mercruiser
Replaces Original Equipment Manufacturer # (OEM #):27-863724 / 27-41813
Fits Application:V-6 & V-8 engines w/center riser manifolds
Mallory Gasket, Exhaust 9-61400

Mallory Gasket, Exhaust 9-61400
Sale Price: $10.99
Save: $1.50
(12% Off $12.49)
Part # 9-61400
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Replaces Original Equipment Manufacturer(OEM):Merc, OMC, Crusader, Barr
Replaces Original Equipment Manufacturer # (OEM #):27-46820
Gasket, Exhaust Elbow - Mallory

Gasket, Exhaust Elbow - Mallory
Sale Price: $7.99
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(9% Off $8.79)
Part # 9-61422
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Part # 9-61422
Gasket, Blocked
Fits center riser Mercruiser
Fresh water closed cooling
Separates anti-freeze and raw water
No stainless plate required
OEM 27-41811
Mounting Kit, Riser - Elbow - Mallory

Mounting Kit, Riser - Elbow - Mallory
Sale Price: $12.99
Save: $2.00
(13% Off $14.99)
Part # 9-40584
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Part # 9-40584
Mounting Kit, Spacer
Fits 9-40531 6" spacer
Includes 9-61414 and 9-61413 gaskets and mounting hardware
Risers 9-40557 and 9-40559 will require their own mounting kits
Mounting Kit, Riser - Elbow - Mallory

Mounting Kit, Riser - Elbow - Mallory
Sale Price: $26.99
Save: $4.00
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Part # 9-40582
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Part # 9-40582
Spacer
3" Center riser
Fits 9-40505 manifold
Sold individually
OEM 93320
Use mounting kit 9-40582 with 9-40557 riser or 9-40583 mounting kit with 9-40559 riser
Mounting Kit, Manifold - Mallory

Mounting Kit, Manifold - Mallory
Sale Price: $17.99
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Part # 9-40575
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Part # 9-40575
Mounting Kit, Manifold
Fits 9-40506 manifold
Includes 9-61400 gasket and mounting hardware
Mounting Kit, Riser - Elbow - Mallory

Mounting Kit, Riser - Elbow - Mallory
Sale Price: $17.99
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Part # 9-40578
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Part # 9-40578
Mounting Kit, Riser
Fits 9-40559 riser
Includes 9-61413 gasket and mounting hardware
Mounting Kit, Riser - Elbow - Mallory

Mounting Kit, Riser - Elbow - Mallory
Sale Price: $33.99
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(12% Off $38.99)
Part # 9-40583
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Part # 9-40583
Mounting Kit, Spacer
Fits 9-40530 3" spacer with 9-40559 riser
Includes 9-61414 and 9-61413 gaskets and mounting hardware required to bolt to 9-40505 manifold
Spacer, Manifold - Mallory

Spacer, Manifold - Mallory
Sale Price: $81.99
Save: $12.96
(13% Off $94.95)
Part # 9-40530
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Part # 9-40530
Spacer
3" Center riser
Fits 9-40505 manifold
Sold individually
Use mounting kit 9-40582 with 9-40557 riser or 9-40583 mounting kit with 9-40559 riser
OEM 93320
Spacer, Manifold - Mallory

Spacer, Manifold - Mallory
Sale Price: $83.99
Save: $13.50
(13% Off $97.49)
Part # 9-40531
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Part # 9-40531
Spacer
6" Center riser
Fits 9-40505 manifold
Sold individually
Use mounting kit 9-40584
Risers 9-40557 and 9-40559 will require their own mounting kits
OEM 93322
Riser, Elbow 3" - Mallory

Riser, Elbow 3" - Mallory
Sale Price: $131.99
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Part # 9-40557
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Part # 9-40557
Replaces OEM#98503, 98504
Riser - 3"
Exhaust outlet 15° down angle
Use mounting kit 9-40580
For early model I/O and inboards
Manifold, V-8 BB Ctr Riser - Mallory

Manifold, V-8 BB Ctr Riser - Mallory
Sale Price: $239.99
Save: $39.01
(13% Off $279.00)
Part # 9-40506
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Part # 9-40506
Manifold - Fits both sides of 454 CID 7.4L V-8 engines - Use mounting kit 9-40575
Replaces OEM part #: 89011
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