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Parts for MerCruiser Race Engine and Drive 420 GM 454 V-8 1987-1989 Exhaust Manifold / Elbow (425 Gil System)

Engine Diagram

Ref. No. Part No. Description Manufacturer List Price Your Price Order
#1 814901A 5 MANIFOLD ASSEMBLY, Exhaust - Port (1 required per assembly)
MANIFOLD ASY-PORT O - Replaced by -8M0084206 814901A 5
814901A 5This part has been superseded. MANIFOLD ASY-PORT O - Replaced by -8M0084206
(more info)
    UnavailableUnavailable Parts
MAIFOLD ASY-PORT 8M0084206  
8M0084206OEM Part 8M0084206 - Manifold Assembly - Port (more info) About Mercury Marine $2,067.62 $2,067.62 Add to shopping cart
Available to order:
Usually ships
within 8 days
#1 814901A 6 MANIFOLD ASSEMBLY, Exhaust - Starboard (1 required per assembly)
MANIFOLD ASY-STBD O - Replaced by -814901T 6  
814901A 6This part has been superseded. MANIFOLD ASY-STBD O - Replaced by -814901T 6
(more info)
    UnavailableUnavailable Parts
MANIFOLD ASSEMBLY 814901T 6 814901T 6
814901T 6OEM Part 814901T 6 - Manifold Assembly, Starboard Side (more info) About Mercury Marine $2,067.62 $2,067.62 Add to shopping cart
Available to order:
Usually ships
within 8 days
#2 16-815214 STUD (8 required per assembly)
STUD 16-815214  
16-815214OEM Part 16-815214 - Stud (more info) About Mercury Marine $7.38 $7.38 Add to shopping cart
Available to order:
Usually ships
within 8 days
#3 32-815212 1 HOSE, Manifold To Exhaust Pipe (2 required per assembly)
HOSE 32-815212  1 32-815212  1
32-815212 1OEM Part 32-815212 1 - Molded Hose (more info) About Mercury Marine $72.59 $72.59 Add to shopping cart
Available to order:
Usually ships
within 8 days
#4 22-816035 FITTING (2 required per assembly)
FITTING 22-816035  
22-816035OEM Part 22-816035 - Fitting (more info) About Mercury Marine $124.49 $124.49 Add to shopping cart
1 in stock. Explain stock levels
#5 19-815203 PLUG, Pipe (2 required per assembly)
PLUG 19-815203  
19-815203OEM Part 19-815203 - Plug (more info) About Mercury Marine $22.72 $22.72 Add to shopping cart
Available to order:
Usually ships
within 8 days
#5A 22-818768 FITTING, Straight (2 required per assembly)
FITTING 22-818768  
22-818768OEM Part 22-818768 - Fitting (more info) About Mercury Marine $81.73 $81.73 Add to shopping cart
2 in stock. Explain stock levels
#6 19-815205 FREEZE PLUG (1.00 Inch) (10 required per assembly)
PLUG              O NLA  
19-815205 PLUG O NLA
(more info)
    UnavailableUnavailable Parts
#7 19-815204 FREEZE PLUG (.750 Inch) (4 required per assembly)
PLUG 19-815204  
19-815204OEM Part 19-815204 - Plug (more info) About Mercury Marine $10.00 $10.00 Add to shopping cart
10+ in stock. Explain stock levels
#8 22-815208 FITTING, Tee (4 required per assembly)
FITTING           O NLA  
22-815208 FITTING O NLA
(more info)
    UnavailableUnavailable Parts
#9 22-815210 FITTING, Tee (1 required per assembly)
FITTING           O NLA  
22-815210 FITTING O NLA
(more info)
    UnavailableUnavailable Parts
#11 22-815209 FITTING, Tee (2 required per assembly)
FITTING           O NLA  
22-815209 FITTING O NLA
(more info)
    UnavailableUnavailable Parts
#12 19-815211 PLUG, Pipe Drain (2 required per assembly)
PLUG              O NLA  
19-815211 PLUG O NLA
(more info)
    UnavailableUnavailable Parts
#13 32-815215 HOSE (3.500 Inches) (6 required per assembly)
HOSE 32-815215 32-815215
32-815215OEM Part 32-815215 - Hose (more info) About Mercury Marine $10.37 $10.37 Add to shopping cart
Available to order:
Usually ships
within 8 days
#14 54-815207 CLAMP (16 required per assembly)
CLAMP 54-815207  
54-815207OEM Part 54-815207 - Clamp (more info) About Mercury Marine $10.73 $10.73 Add to shopping cart
Available to order:
Usually ships
within 8 days
#15 16-49545 STUD (.375-16 x 1.750) (4 required per assembly)
STUD (3/8 x 1.75) 16-49545 16-49545
16-49545OEM Part 16-49545 - Stud - Priced Individually (more info) About Mercury Marine $2.00 $2.00 Add to shopping cart
4 in stock. Explain stock levels
#15 16-821279 STUD (.375-16 x 2.187) (4 required per assembly)
STUD 16-821279  
16-821279OEM Part 16-821279 - Stud (more info) About Mercury Marine $4.80 $4.80 Add to shopping cart
Available to order:
Usually ships
within 8 days
#16 10-821107 SCREW, (.375-16 x 3.00) (8 required per assembly)
SCREW (.375-16 x 10-821107 10-821107
10-821107OEM Part 10-821107 - Screw (more info) About Mercury Marine $6.42 $6.42 Add to shopping cart
6 in stock. Explain stock levels
#16 10-815166 SCREW, (.375-16 x 5.625) (8 required per assembly)
SCREW             O NLA  
10-815166 SCREW O NLA
(more info)
    UnavailableUnavailable Parts
#17 10-815687 SCREW, (.375-16 x 1.250) Stainless Steel (4 required per assembly)
SCREW (.375-16 x 10-815687 10-815687
10-815687OEM Part 10-815687 - Screw (more info) About Mercury Marine $14.50 $14.50 Add to shopping cart
Available to order:
Usually ships
within 8 days
#17 10-812567 SCREW, (.375-16 x 1.625) (4 required per assembly)
SCREW (.375-16 x 10-812567 10-812567
10-812567OEM Part 10-812567 - Screw (more info) About Mercury Marine $6.25 $6.25 Add to shopping cart
1 in stock. Explain stock levels
#18 12-20572 WASHER, (.390 x .750 x .093) (8 required per assembly)
WASHER (.390 x .7 12-20572  
12-20572OEM Part 12-20572 - Washer (more info) About Mercury Marine $1.10 $0.62 Add to shopping cart
9 in stock. Explain stock levels
#19 12-37828 WASHER, (.390 x .625 x .062) Stainless Steel (8 required per assembly)
WASHER (.390 x .6 12-37828  
12-37828OEM Part 12-37828 - Washer (more info) About Mercury Marine $0.50 $0.50 Add to shopping cart
Available to order:
Usually ships
within 8 days
#20 11-25269 NUT, (.375-24) (4 required per assembly)
NUT (.375-24) 11-25269 11-25269
11-25269OEM Part 11-25269 - Nut - Priced Individually (more info) About Mercury Marine $1.80 $1.80 Add to shopping cart
Available to order:
Usually ships
within 8 days
#21 27-46820 GASKET, Exhaust Manifold To Head (2 required per assembly)
GASKET Note: must be ordered in multiples of 2 27-46820 27-46820
27-46820OEM Part 27-46820 - Gasket - Priced Individually Long (more info) About Mercury Marine $19.60 $16.78 Add to shopping cart
4 in stock. Explain stock levels
Gasket 18-0418
18-0418OEM Match 18-0418 - Manifold Gasket Big Bk Chevy (more info)
Replaces OEM #3852472
About Sierra Marine $14.49 $11.74 Add to shopping cart
10+ in stock. Explain stock levels
#22 818495A 1 TAILPIPE ASSEMBLY, Exhaust (2 required per assembly) Standard
TAILPIPE ASY-STD  O NLA 818495A 1
818495A 1 TAILPIPE ASY-STD O NLA
(more info)
    UnavailableUnavailable Parts
#22 818496A 1 TAILPIPE ASSEMBLY, Exhaust (OPT required per assembly) (3.00 Inches)
TAILPIPE ASY-3 IN O NLA  
818496A 1 TAILPIPE ASY-3 IN O NLA
(more info)
    UnavailableUnavailable Parts
#22 818497A 1 TAILPIPE ASSEMBLY, Exhaust (OPT required per assembly) (6.00 Inches)
TAILPIPE ASY-6 IN O NLA 818497A 1
818497A 1 TAILPIPE ASY-6 IN O NLA
(more info)
    UnavailableUnavailable Parts
#23 27-848147 GASKET, Exhaust Elbow (2 required per assembly)
GASKET 27-848147 27-848147
27-848147OEM Part 27-848147 - Gasket (more info) About Mercury Marine $27.56 $27.56 Add to shopping cart
Available to order:
Usually ships
within 8 days
#24 12-49112 WASHER (8 required per assembly)
WASHER 12-49112  
12-49112OEM Part 12-49112 - Washer (more info) About Mercury Marine $1.35 $1.35 Add to shopping cart
3 in stock. Explain stock levels
#25 11-68411 NUT, (.375-16) (8 required per assembly)
NUT @5            O - Replaced by 11-826709 12  
11-68411This part has been superseded. NUT @5 O - Replaced by 11-826709 12
(more info)
    UnavailableUnavailable Parts
NUT (.375-16) Sta 11-826709 12  
11-826709 12OEM Part 11-826709 12 - Nut - Priced Individually (more info) About Mercury Marine $4.60 $4.60 Add to shopping cart
Available to order:
Usually ships
within 8 days
#26 816037 PLATE, Diffuser (2 required per assembly)
PLATE 816037 816037
816037OEM Part 816037 - Plate -difFuser (more info) About Mercury Marine $142.27 $142.27 Add to shopping cart
Available to order:
Usually ships
within 8 days
#27 32-68894 1 HOSE, (48.00 Inches Bulk) (6.00 Inches) Cut As Required (1 required per assembly)
HOSE (48.00 Inche 32-68894  1 32-68894  1
32-68894 1OEM Part 32-68894 1 - Hose (more info) About Mercury Marine $25.22 $25.22 Add to shopping cart
Available to order:
Usually ships
within 8 days
#28 54-815504105 CLAMP, Worm Gear (2 required per assembly)
CLAMP Worm Gear ( 54-815504105  
54-815504105OEM Part 54-815504105 - Clamp (more info) About Mercury Marine $2.70 $2.70 Add to shopping cart
Available to order:
Usually ships
within 8 days
#- 27-808730A92 GASKET SET (1 required per assembly)
GASKET SET        O - Replaced by 27-808730A98  
27-808730A92This part has been superseded. GASKET SET O - Replaced by 27-808730A98
(more info)
    UnavailableUnavailable Parts
GASKET SET        O NLA 27-808730A98
27-808730A98 GASKET SET O NLA
(more info)
    UnavailableUnavailable Parts