Sierra
Mercruiser GM Small Block V8 (198, 228, 898) Sterndrive Exhaust Manifold Exploded View
Mercruiser Sterndrive Exhaust Manifold Exploded View Diagram and Parts
Fits GM Small Block V8 305-350 cu. In.
Models 198, 226 & 898
Figure #DescriptionO.E.M. #Sierra #Application
1MANIFOLD (STARBOARD)774235A2 18-1951-1 
2MANIFOLD ELBOW76771A3 18-1978Use with Manifolds: 18-1950-1, 18-1951-1; Elbow Gasket 18-2833; Mounting Kit 18-4362.
3MOUNTING STUD16-49545 18-32333/8-24, 3/8-16 X 1 3/4. Included in 18-4362 mounting kit.
4MOUNTING STUDN/ANSSIncluded in 18-8554 mounting kit.
5MOUNTING BOLTN/ANSSIncluded in 18-8512 mounting kit.
6ELBOW GASKET27-99777-2 18-2833Use with Elbows: 18-1971 & 18-1978. Included in 18-4362 mounting kit.
7MANIFOLD ELBOW76351A2 18-1971Use with Manifolds: 18-1950-1, 18-1951-1; Elbow Gasket 18-2833; Mounting Kit 18-4362.
8MANIFOLD SPACER61851 18-19063" Spacer for Manifold: 18-1950-1, 18-1951-1. Use with mounting kit 18-8554 with 18-1971 or 18-1978 Elbows.
9BLOCK OFF PLATE60207 18-4008Use with Manifolds 18-1950-1, 18-1951-1. Requires (2) 18-2833 elbow gaskets
10MANIFOLD (PORT)77234A2 18-1950-1 
11END PLATE60252A2 18-4009Use with (Port & Starboard) Manifolds: 18-1950-1 & 18-1951-1; Mounting Kit: 18-8512
12FRONT/END PLATE GASKET27-48043-1 18-2832Fits Port & Starboard Caps of Manifolds: 18-1950-1, 18-1951-1. Use with Front Plate: 18-4009; End Plate: 18-1912. Included in 18-8512 mounting kit.
13END PLATE54870 18-1912Fits Manifold: 18-1950-1, 18-1951-1; Mounting Kit: 18-8512.
14MANIFOLD GASKET96306 18-2949Use with Manifold: 18-1951-1
15MOUNTING BOLTN/ANSSIncluded in 18-8520 mounting kit.
16MOUNTING KITN/A 18-8520Use with Manifolds: 18-1950-1, 18-1951-1. Includes 18-2949 manifold gasket.
17MOUNTING KITN/A 18-8512Use with Front/End Plates: 18-4009, 18-1912. Includes 18-2832 front end plate gasket
18MOUNTING KITN/A 18-8554Use with Manifold Spacer: 18-1908 with Riser 18-1971 or 18-1978 Elbows. Included in 18-1908K. Includes (1) 18-2849 & 18-0897 elbow gaskets.
19MOUNTING KITN/A 18-8514Use with Elbows: 18-1971 & 18-1978. Includes 18-2833 gasket & 18-4008 block off plate.
20MOUNTING KITN/A 18-4362Use with Elbows: 18-1971 & 18-1978. Includes 18-2833 elbow gasket.
21HARDWARE KITN/A 18-8548Includes only hardware for 18-1950-1 & 18-1951-1 manifolds. Included in 18-8520 mounting kit.
Full StarFull StarFull StarFull StarFull Star
Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull Star
Review for Exhaust Manifold Elbow Mounting Package for Mercruiser, Barr MC20-60426P, GLM 5
by a Customer on May 28, 2009
(1 of 2 people found this review helpful)
Was this review helpful?
Average Customer Review for Sierra 18-1971 Exhaust Manifold Elbow
Full StarFull StarFull StarFull StarFull Star
Based On 3 Reviews | Write Review
Full StarFull StarFull StarFull StarFull Star
228 Mercruiser exhaust riser
by Joseph from Naples, Florida on August 11, 2016
Awesome customer service!
Was this review helpful?
Full StarFull StarFull StarFull StarFull Star
Good part
by Glen from Shaunavon, Saskatchewan on February 01, 2015
Elbow fit well, and looks well built.
Was this review helpful?
Full StarFull StarFull StarFull StarFull Star
EXCELLENT AFTERMARKET PART
by James from Hamptonville, North Carolina on September 27, 2011
This elbow is far superior to the "stock" units that are no longer available. It is solid cast for as twin-wall and the bolt mating end is stainless steel!
(2 of 2 people found this review helpful)
Was this review helpful?
Full StarFull StarFull StarFull StarFull Star
Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull Star
ok
by Martin from Jonquiere, Quebec on June 28, 2014
good delivery time
(0 of 2 people found this review helpful)
Was this review helpful?
Full StarFull StarFull StarFull StarFull Star
Based On 7 Reviews | Write Review
Full StarFull StarFull StarFull StarFull Star
Perfect fit!
by Richard from Tampa, Florida on October 20, 2015
Package came on time and included two gaskets for multiple applications. Perfect fit!
Was this review helpful?
Full StarFull StarFull StarFull StarFull Star
Fits
by Adam from Bowling Green, Kentucky on March 03, 2014
Fits, that all that's required. Does the job.
Was this review helpful?
Full StarFull StarFull StarFull StarFull Star
always nice parts
by Jay from Victor, Montana on October 06, 2013
great fitting as usual. Thanks for the great service .Jay
Was this review helpful?
Full StarFull StarFull StarFull StarFull Star
Good
by Zach from West Valley, Utah on September 07, 2012
This worked on my engine perfectly. I have a 1974 Mercruiser with a 302 Ford in it.
Was this review helpful?
Full StarFull StarFull StarFull StarEmpty Star
Product was fine, severe shipping issues
by Mike from Lumberton, North Carolina on May 18, 2012
Product was fine. Logistics at iboats getting the product shipped in a timely manner needs work. It was not shipped for 24 hours after I ordered the product.
(1 of 1 people found this review helpful)
Was this review helpful?
Full StarFull StarFull StarFull StarFull Star
exhaust gasket
by Ron from Bellflower, California on May 30, 2011
fixed our problem. thanks
(0 of 1 people found this review helpful)
Was this review helpful?
Full StarFull StarFull StarFull StarFull Star
Review for Sierra 18-2833 Exhaust Elbow Gasket
by a Customer on October 06, 2008
perfect
(0 of 1 people found this review helpful)
Was this review helpful?
Full StarFull StarFull StarFull StarHalf Star
Based On 2 Reviews | Write Review
Full StarFull StarFull StarFull StarFull Star
none
by Roger from Ocean Isle Beach, North Carolina on November 17, 2011
none
(0 of 2 people found this review helpful)
Was this review helpful?
Full StarFull StarFull StarFull StarEmpty Star
Review for Sierra 18-8520 Exhaust Manifold Mounting Kit
by a Customer on May 28, 2009
(0 of 3 people found this review helpful)
Was this review helpful?
Average Customer Review for End Cap Gasket - 18-2832-9 - Sierra
Full StarFull StarFull StarFull StarFull Star
Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull Star
gasket
by Ron from Bellflower, California on May 30, 2011
perfect fit works great
(0 of 1 people found this review helpful)
Was this review helpful?
Full StarFull StarFull StarFull StarEmpty Star
Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarEmpty Star
"New" old parts
by James from Hamptonville, North Carolina on September 24, 2011
Very nicely cut, fits bolt pattern. However, seems a smidge thinner than OE.
Was this review helpful?
Full StarFull StarFull StarFull StarFull Star
Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull Star
Review for Sierra 18-8554 Exhaust Elbow Mounting Kit
by a Customer on May 28, 2009
(0 of 2 people found this review helpful)
Was this review helpful?
Full StarFull StarFull StarFull StarEmpty Star
Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarEmpty Star
Review for Sierra 18-8512 Exhaust Elbow Mounting Kit
by a Customer on May 28, 2009
Was this review helpful?
Full StarFull StarFull StarFull StarFull Star
Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull Star
Review for Sierra 18-8514 Exhaust Elbow Mounting Kit
by a Customer on May 28, 2009
(0 of 1 people found this review helpful)
Was this review helpful?
Q:
I want to know what comes in the mountain package?
A:
It is supplied with end cap gasket, elbow gasket, plugs, etc. It will be the same as what is pictured in 18-1951-1 on our site. http://www.iboats.com/Exhaust-Manifold-With-Mounting-Package-18-1951-1-Sierra/dm/view_id.221752


Q:
The Volvo OEM part?
A:
Replaces Volvo OEM #'s: 835966 & 856034.


Q:
Does this include TWO gaskets per kit (both sides of engine) or just one?
A:
This does not come in a pair. This comes with one single gasket. The part number for just the gasket is 18-2949.


Q:
Are the bolts avaliable seperatly?
A:
No they are not sold separately.


Q:
I just took down my 1975 198. I found that the port side elbow riser did not have a blocking plate and the starboard side does. Should both sides have the blocking plate?
A:
Yes both sides should have a blocking plate


Q:
Will this come with gaskets?
A:
No, each gasket you'll need to by individual or they might have a gasket set depending on your engine application. This is just the manifold alone.


Q:
What is the diameter 3 or 3 1/2?
A:
The diameter is 3-1/2 inches.


Ask a question
Question & Answer Guidelines
This product ships in 1 to 3 business days.
Add to Cart and enter your Postal Code to determine the shipping charges and estimated delivery date.
Most products and orders leave our warehouse in 1 business day. However, select items may take more processing time. Alaska and Hawaii orders please add 1 additional warehouse processing day.
Standard Shipping Policies
Price: $9.57
Save: $4.92
(33% Off $14.49)
Part # 18-4362
2nd Day Air for $2 More Eligible
Replaces OEM part #
  • BARR MC20-60426P
Use with:
    Elbow: 18-1971 & 18-1978
Includes 18-2833 elbow gasket
Price: $128.00
Save: $55.99
(30% Off $183.99)
Part # 18-1971
2nd Day Air for $2 More Eligible
Replaces OEM part #
  • MERCURY MARINE 76351A2
  • MERCURY MARINE 76351A04
  • MERCURY MARINE 76351A1
  • MERCURY MARINE 60426A1
  • MERCURY MARINE 49964A2
  • MERCURY MARINE 49964A1
  • BARR MC20-60426P
For: most early model Mercruiser 140 HP (4 cyl) applications

Use with:
  • Manifold: 18-1960-1, 18-1958, 18-1950-1, 18-1951-1, 18-1962, 18-1954-1, 18-1955-1, 18-1956-1
  • Elbow Gasket: 18-2833
  • Mounting Kit: 18-4362
Price: $248.27
Save: $221.72
(47% Off $469.99)
Part # 18-1951-1
Replaces OEM part #
  • MERCURY MARINE 77235A 8
  • MERCURY MARINE 77235A2
Starboard Side
Fits most Mercuiser (GM)small blocks with end riser, (V8) 305-350 cu.in. models 198, 228, & 898.
Supplied with Mounting Package
Use with:
    Exhaust Manifold Gasket: 18-2949
    Mounting Kit: 18-8548
Price: $3.99
Save: $1.99
(33% Off $5.98)
Part # 18-2833-9
2nd Day Air for $2 More Eligible
Replaces OEM part #
  • MERCURY MARINE 27-99777-2
Package of 2
Use with Elbows: 18-1971, 18-1978 & 18-1972. Included in 18-4362 mounting kit
Price: $15.99
Save: $4.50
(21% Off $20.49)
Part # 18-8520
2nd Day Air for $2 More Eligible
For: Mercruiser GM Small Block V8 305-350cu.in. (Models: 198, 200, 228, 230, 260, 898)

Used with:
    Manifold: 18-1950-1,18-1951-1, 18-1953-2
Includes 18-2949 manifold gasket
Price: $24.45
Save: $3.04
(11% Off $27.49)
Part # 18-8548
2nd Day Air for $2 More Eligible
No Reviews
Includes only Hardware for 18-1950-1 & 18-1951-1 manifolds
Included in 18-8520 mounting kit
Price: $21.87
Save: $6.11
(21% Off $27.98)
Part # 18-2949-9
2nd Day Air for $2 More Eligible
Pkg of 2
Replaces OEM part #
  • CRUSADER 96306
  • BARR CHV-47-000
  • VOLVO 835966-3
  • VOLVO 856034-4
  • MERCURY MARINE 27-33395
  • MERCURY MARINE 27-33395B

Use with:
  • 18-1931-1: Manifold
  • 18-1986-1: Manifold
  • 18-1997-1: Manifold
  • 18-1902: Manifold
  • 18-1903: Manifold
  • 18-1904: Manifold
  • 18-1914: Manifold
  • 18-1925: Manifold
  • 18-1926: Manifold
  • 18-1950-1: Manifold
  • 18-1951-1: Manifold
  • 18-1953-2: Manifold
For:
  • AQ200, 225, 260, 271, 290, 311, V-8

Price: $97.64
Save: $44.35
(31% Off $141.99)
Part # 18-1906
2nd Day Air for $2 More Eligible
No Reviews
Replaces OEM part #
  • MERCURY MARINE 61851
3" Spacer for 18-1950, 18-1950-1, 18-1951, 18-1951-1, 18-1958 & 18-1962 manifolds
Use with mounting 18-8554 with 18-1971 or 18-1978 elbows
Price: $2.83
Save: $0.47
(14% Off $3.30)
Part # 18-2832-9
2nd Day Air for $2 More Eligible
Replaces OEM part #
  • MERCURY MARINE 27-48043-1
Package of 2
Fits Port & Starboard Caps of Manifold: 18-1960-1, 18-1950-1, 18-1951-1, 18-1958, 18-1962, 18-1954-1, 18-1955-1, 18-1956-1
Use with Front Plate: 18-4009
End Plate: 18-1912
Included in 18-8512 mounting kit
Price: $8.93
Save: $2.06
(18% Off $10.99)
Part # 18-4008
2nd Day Air for $2 More Eligible
Replaces OEM part #
  • MERCURY MARINE 60207
Use with:
    Riser: 18-1971, 18-1978
    Manifolds: 18-1950-1, 18-1951-1, 18-1958, 18-1962
Requires (2) 18-2833 elbow gaskets
Price: $36.04
Save: $18.45
(33% Off $54.49)
Part # 18-8554
2nd Day Air for $2 More Eligible
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
Price: $54.55
Save: $24.94
(31% Off $79.49)
Part # 18-4009
2nd Day Air for $2 More Eligible
No Reviews
Replaces OEM part #
  • MERCURY MARINE 60252A2
Use with:
    Manifold: 18-1960-1, 18-1958, 18-1950-1, 18-1951-1, 18-1962, 18-1954-1, 18-1955-1, 18-1956-1
    End Plate Gasket: 18-2832
    Mounting Kit: 18-8512
Price: $259.06
Save: $180.93
(41% Off $439.99)
Part # 18-1950-1
Replaces OEM part #
  • MERCURY MARINE 77234A2
Port Side
Fits most Mercuiser (GM) small blocks with end riser, (V8) 305-350 cu.in. Models 198, 228, & 898
Supplied with Mounting Package
Use with:
    Exhaust Manifold Gasket: 18-2949
    Mounting Kit: 18-8548
Price: $190.88
Save: $149.11
(43% Off $339.99)
Part # 18-1978
2nd Day Air for $2 More Eligible
No Reviews
Replaces OEM part #
  • MERCURY MARINE 76771A2
  • MERCURY MARINE 76771A3
For: V-8 Inboard Applications Only
Use with:
    Manifold: 18-1950-1, 18-1951-1, 18-1958, 18-1962, 18-1954-1, 18-1955-1, 18-1956-1
    Elbow Gasket: 18-2833
    Mounting Kit: 18-4362
Exhaust Manifold Elbow Mounting Kit - Sierra
Price: $10.05
Save: $3.94
(28% Off $13.99)
Part # 18-8512
2nd Day Air for $2 More Eligible
Hurry! Only 1 left in stock
For: Mercruiser GM 4 Cylinder 181cu.in. (Models:120, 140, 2.5L, 3.0L), GM Inline 6 Cylinder 250-292cu.in. (Models: 165 and 200), Ford Small Block V8 302-351cu.in. (Models: 215, 225, 233, 255, 888), GM Small Block V8 305, 350cu.in. (Models: 198, 228, 898)

Used with:
    Front Plate: 18-4009
    Rear Plate: 18-1912
Includes 18-2832 gasket
Price: $28.00
Save: $12.49
(30% Off $40.49)
Part # 18-8514
2nd Day Air for $2 More Eligible
For: Mercruiser Ford Small Block V8 302-351cu.in. (Models: 215, 225, 233, 255, 888), GM Small Block V8 305-351cu.in. (Models: 198, 228, 898)

Used with:
    Riser: 18-1971 & 18-1978
    (Not for Fresh Water/Closed Cooling Systems)
Includes 18-2833 gasket & 18-4008 block off plate
Price: $57.99
Discontinued
Save: $17.25
(22% Off $75.24)
Part # 9-40120
2nd Day Air for $2 More Eligible
No Reviews
80° x 3" I.D.
(Discontinued)
Price: $89.99
Save: $30.24
(25% Off $120.23)
Part # 9-40532
2nd Day Air for $2 More Eligible
No Reviews
Spacer
3" Rear riser
Fits 9-40501 and 9-40502 manifolds and 9-40532 spacer with 9-40556 or 9-40558 risers
OEM 61851
Price: $126.99
Save: $40.70
(24% Off $167.69)
Part # 9-40558
2nd Day Air for $2 More Eligible
No Reviews
Riser - 3" Exhaust outlet
90° down angle
Use 9-40170 mounting kit
Most I/O applications
OEM 76351, 60426, 49964
Price: $247.99
Save: $76.01
(23% Off $324.00)
Part # 9-40556
2nd Day Air for $2 More Eligible
No Reviews
Riser
3" Exhaust outlet
0° down angle
Use 9-40170 mounting kit
Most inboard applications
OEM 76771, 60427
Price: $311.99
Save: $107.20
(25% Off $419.19)
Part # 9-40504
No Reviews
Manifold, Starboard - Log style manifold fits 305 - 350 CID V-8 - Use 9-40573 mounting kit
Replaces OEM part #: 77235B, 77235A8
Price: $310.99
Save: $103.01
(24% Off $414.00)
Part # 9-40503
No Reviews
Manifold, Port - Log style manifold fits 305 - 350 CID V-8 - Use 9-40573 mounting kit
Replaces OEM part #: 77234B, 77234A7
Price: $118.99
Save: $57.27
(32% Off $176.26)
Part # T-20907
2nd Day Air for $2 More Eligible
Hurry! Only 1 left in stock
No Reviews

Barr and Indmar Riser, 3" Outlet, 30° down angle.


Replaces OEM #:

  • Barr 20-0102
  • Indmar 53-2009 and 53-2018

Engine Type:
Ford Small Block V8 302-351 cu.inGM Small Block V8 305-350 cu.in.


Engine Model:
Universal fit

Price: $245.61
(Out of stock)
Save: $173.58
(41% Off $419.19)
Part # T-20951
No Reviews

Manifold, starboard, Log style manifold


Replaces OEM #:

  • Mercruiser # 77235B


Engine Type:
GM Small Block V8 305-350 cu.in.


Engine Model:
198, 228 and 898

(Out Of Stock)
Price: $167.87
Save: $91.33
(35% Off $259.20)
Part # T-20952

Mercruiser Manifold


Replaces OEM #:

  • Mercrusier 99745
  • Mercruiser 99746

*Fits both sides of engine.


Engine Type:
GM V6 229 and 262 cu.in.


Engine Model:
185 and 205

Price: $260.41
Save: $144.85
(35% Off $405.26)
Part # T-20982
No Reviews

Crusader Manifold


Replaces OEM #:

  • Crusader 98125

Engine Type:

GM Big Block V8 454 cu.in.


Engine Model:
454XL and 502XL