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Parts for MerCruiser Race Engine and Drive 525 EFI Exhaust Header / Tailpipe Assembly

#1 843933A01 HEADER KIT, Exhaust - Starboard, Also Includes Tailpipe Gasket 27-842454 (1 required per assembly) SN# 0M956602 THRU 0M960481
HEADER KIT-STBD   O - Replaced by -843933T02
843933A01

This part has been superseded.

843933A01 - HEADER KIT-STBD O [ More info ]
Unavailable
Replaced by -843933T02
HEADER KIT-STBD   O - Replaced by -843933T03
 

This part has been superseded.

843933T02 - HEADER KIT-STBD O [ More info ]
Unavailable
Replaced by -843933T03
REF MR SB2010-01  O NLA
843933T03

About Mercury Marine

OEM Part

REF MR SB2010-01 O NLA [ More info ]
Unavailable
#1 843933T02 HEADER KIT, Exhaust - Starboard, Also Includes Tailpipe Gasket 27-842454 (1 required per assembly) SN# 0M960482 & Up
#1 843934A01 HEADER KIT, Exhaust - Port, Also Includes Tailpipe Gasket 27-842454 (1 required per assembly) SN# 0M956602 THRU 0M960481
HEADER KIT-PORT   O - Replaced by -843934T02
843934A01

This part has been superseded.

843934A01 - HEADER KIT-PORT O [ More info ]
Unavailable
Replaced by -843934T02
HEADER KIT-PORT   O - Replaced by -843934T03
 

This part has been superseded.

843934T02 - HEADER KIT-PORT O [ More info ]
Unavailable
Replaced by -843934T03
REF MR SB 2010-01 O NLA
843934T03

About Mercury Marine

OEM Part

REF MR SB 2010-01 O NLA [ More info ]
Unavailable
#1 843934T02 HEADER KIT, Exhaust - Port, Also Includes Tailpipe Gasket 27-842454 (1 required per assembly) SN# 0M960482 & Up
#2 27-840940 GASKET, Exhaust Header (2 required per assembly)
GASKET Note: must be ordered in multiples of 2 27-840940
27-840940

About Mercury Marine

OEM Part

27-840940 - Gasket - Priced Individually [ More info ]

Add to shopping cart $28.35
Available to order: Usually ships within 8 days. Explain stock levels

#3 10-821131 SCREW, (.375-16 x 1.00) (16 required per assembly)
SCREW (.375-16 x 1.00) 10-821131
10-821131

About Mercury Marine

OEM Part

10-821131 - Screw - Priced Individually [ More info ]

Add to shopping cart $6.30
Available to order: Usually ships within 8 days. Explain stock levels

#4 22-806608A 1 PLUG KIT, (.500-13) Royal Blue (4 required per assembly) - Design I - Marked 22-806608
PLUG KIT @5       O - Replaced by 22-806608A02
22-806608A 1

This part has been superseded.

22-806608A 1 - PLUG KIT @5 O [ More info ]
Unavailable
Replaced by 22-806608A02
228M0119211 22-806608A02
22-806608A02

About Mercury Marine

OEM Part

22-806608A02 - Plug Assembly - Priced Individually [ More info ]

Add to shopping cart $7.00
10 in stock. Explain stock levels

DRAIN PLUG
18-4226

About Sierra Marine

OEM Match

18-4226 - Drain Plug, 22-806608A1 [ More info ]

Add to shopping cart $4.49 $2.97
10+ in stock. Explain stock levels

PLUG KIT Note: must be ordered in multiples of 2   22806608Q01
22806608Q01

About Mercury Marine

OEM Part

22-806608Q01 - Plug Kit - Priced Individually [ More info ]

Add to shopping cart $7.00
Available to order: Usually ships within 8 days. Explain stock levels

#4 22-806608A02 PLUG ASSEMBLY, (.500-13) Blue (4 required per assembly) - Design II - Marked 8M2000874
#5 25-831985 O-RING, (.468 x .078) (4 required per assembly) - Design I
O-RING (.468 x .078) 25-831985
 

About Mercury Marine

OEM Part

25-831985 - O-Ring [ More info ]

Add to shopping cart $3.80
Available to order: Usually ships within 8 days. Explain stock levels

#5 25-8M2000926 SEAL (4 required per assembly) - Design II
SEAL @10          O - Replaced by 25-26802
 

This part has been superseded.

25-8M2000926 - SEAL @10 O [ More info ]
Unavailable
Replaced by 25-26802
O-RING (.424 x .103) 25-26802
25-26802

About Mercury Marine

OEM Part

25-26802 - O-Ring - Priced Individually [ More info ]

Add to shopping cart $2.90
Available to order: Usually ships within 8 days. Explain stock levels

O-Ring
18-7180

About Sierra Marine

OEM Match

18-7180-9 - O-Ring (PK5 ) 925055 [ More info ]

Add to shopping cart $14.95 $10.08
5 in stock. Explain stock levels

#6 22-8M0022059 BUSHING, Reducer (.750-14/.500-13) (2 required per assembly)
BUSHING Reducer (.750-1 22-8M0022059
 

About Mercury Marine

OEM Part

22-8M0022059 - Bushing [ More info ]

Add to shopping cart $24.64
Available to order: Usually ships within 8 days. Explain stock levels

#7 8M0025008 TAILPIPE ASSEMBLY (2 required per assembly)
REF MR SB 2010-01 O NLA
8M0025008

About Mercury Marine

OEM Part

REF MR SB 2010-01 O NLA [ More info ]
Unavailable
#8 54-18076 3 CLAMP, Worm Gear (4 required per assembly)
CLAMP Worm Gear 54-18076  3
 

About Mercury Marine

OEM Part

54-18076 3 - Clamp [ More info ]

Add to shopping cart $9.70
Available to order: Usually ships within 8 days. Explain stock levels

#9 32-842418 1 HOSE, Molded (2 required per assembly)
HOSE Molded 32-842418  1
32-842418  1

About Mercury Marine

OEM Part

32-842418 1 - Molded Hose [ More info ]

Add to shopping cart $22.50 $19.26
2 in stock. Explain stock levels

#10 27-842454 GASKET, Tailpipe (2 required per assembly)
GASKET 27-842454
27-842454

About Mercury Marine

OEM Part

27-842454 - Gasket [ More info ]

Add to shopping cart $19.45
Available to order: Usually ships within 8 days. Explain stock levels

#11 11-842458 NUT, (.250-20) (2 required per assembly)
NUT               O - Replaced by 11-826711 10
 

This part has been superseded.

11-842458 - NUT O [ More info ]
Unavailable
Replaced by 11-826711 10
NUT (.312-18) 11-826711 10
 

About Mercury Marine

OEM Part

1182671110 - Nut .312-18 [ More info ]

Add to shopping cart $2.50
Available to order: Usually ships within 8 days. Explain stock levels

#12 54-842456 CLAMP, Band (2 required per assembly)
CLAMP-BAND        O - Replaced by 54-8M0051201
 

This part has been superseded.

54-842456 - CLAMP-BAND O [ More info ]
Unavailable
Replaced by 54-8M0051201
CLAMP Band 54-8M0051201
 

About Mercury Marine

OEM Part

548M0051201 - Clamp-BAND [ More info ]

Add to shopping cart $80.06
Available to order: Usually ships within 8 days. Explain stock levels

#13 10-842457 T BOLT, (.250-20) (2 required per assembly)
T BOLT (.250-20) 10-842457
10-842457

About Mercury Marine

OEM Part

10-842457 - T Bolt [ More info ]

Add to shopping cart $16.14
Available to order: Usually ships within 8 days. Explain stock levels

#14 22-842453406 FITTING, Restrictor (.406) (2 required per assembly)
FITTING Restrictor (.40 22-842453406
 

About Mercury Marine

OEM Part

22-842453406 - Fitting [ More info ]

Add to shopping cart $38.15
Available to order: Usually ships within 8 days. Explain stock levels

#15 22-32803 PLUG, Pipe (.375-18) Brass (2 required per assembly)
PLUG Pipe (.375-18) Bra 22-32803
22-32803

About Mercury Marine

OEM Part

22-32803 - Plug [ More info ]

Add to shopping cart $4.80
3 in stock. Explain stock levels

Pipe Plug, 3/8-18 Npt Pipe
18-4264

About Sierra Marine

OEM Match

18-4264 - Pipe Plug, 3/8-18 NPT Pi [ More info ]

Add to shopping cart $3.99 $3.41
Available to order: Usually ships within 8 days. Explain stock levels

#16 861776A 2 PLATE KIT, Exhaust Blockoff (1 required per assembly)
PLATE KIT 861776A 2
861776A 2

About Mercury Marine

OEM Part

861776A 2 - Exhaust Plate Kit [ More info ]

Add to shopping cart $68.66
5 in stock. Explain stock levels

#17 13-41471 LOCKWASHER, (.375) (4 required per assembly)
LOCKWASHER (.375) 13-41471
 

About Mercury Marine

OEM Part

13-41471 - LockWasher [ More info ]

Add to shopping cart $1.40
1 in stock. Explain stock levels

#18 10-98794 SCREW, (.375-16 x 1.00) (4 required per assembly)
SCREW (.375-16 x 1.00) 10-98794
10-98794

About Mercury Marine

OEM Part

10-98794 - Screw [ More info ]

Add to shopping cart $3.20
8 in stock. Explain stock levels

Screw, Upper Drive Cap
18-3231

About Sierra Marine

OEM Match

18-3231 - Bolt, 10-98794 [ More info ]

Add to shopping cart $2.99 $2.41
4 in stock. Explain stock levels

#- 27-843073A06 GASKET/SEAL SET, Engine Overhaul (1 required per assembly) - NOTE: See Gasket/Seal Set - Engine Overhaul Section For Complete Parts Listing
GASKET/SEAL SET Engine 27-843073A06
27-843073A06

About Mercury Marine

OEM Part

27-843073A06 - Gasket/Seal Set [ More info ]

Add to shopping cart $951.21
Available to order: Usually ships within 8 days. Explain stock levels

#- 841178A05 PARTIAL ENGINE ASSEMBLY (1 required per assembly)
PARTIAL ENGINE ASSEMBLY 841178A05
 

About Mercury Marine

OEM Part

841178A05 - Partial - 525 Efi [ More info ]

Add to shopping cart $17,186.38
Available to order: Usually ships within 8 days. Explain stock levels