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Check Valve Assembly Mercruiser 21-42657A3

Check Valve Assembly Mercruiser 21-42657A3 

# 525-21-42657A3
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Check Valve Assembly Mercruiser 21-42657A3

Supersedes: 21-56011A1, 21-56011A2, 21-F694740, 21-42657A1

Supercedes: 21-56011A1, 21-56011A2, 21-42657A1, 21-42657A1

Don't know if this part is right for your application? Use our handy Mercury Replacement Parts Finder Tool to check. Make sure you know your Model, Year and Serial Number.

NOTICE: Any images shown are representational ONLY and do not necessarily depict the actual part or included items in a particular part or kit. Mercury has been known to remove items depicted in product images such as screws or gaskets from kits they make without notification. For any product content, fitment or application questions on this part please call Mercury Product Support at 920-929-5040.
MSRP: $7.00
Your Price: $7.00
 You Save: 0% off MSRP!

NOTE: This Item is a Non-Stocked, Special Order, OEM Mercury Part.
ALL OEM Mercury parts may take up to 7-10 days to ship. All OEM Mercury parts are NON-RETURNABLE! Orders placed on all OEM Mercury parts are NON-REFUNDABLE! Please contact us with the part number and we can assist you with more accurate delivery time estimate.
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Additonal Info On This Product:

Applications Where This Item Is Used:

100/115/125 HP 80 JET (4 CYLINDER) - 100 (4 CYL.)XR/MAGNUM 10/SEAPRO/MARATHON 10/SEAPRO/MARATHON 15 - 10 SEA PRO
30/40 (2 CYLINDER) 2-STROKE - 30 (2 CYL.)30/40 HP - 30 (2 CYL.)
225/250 EFI (3.0L) - 250 (3.0L EFI)115/125 HP 80 JET (4 CYLINDER) - 80 JET
50/55/60 JET 45 - 45 JET6/8/9.8 2-STROKE (INTERNATIONAL) - 6 (2 Cyl.)(International)
FORCE 75 HP (1998) - 75 H.P. (1998)115/125 HP 80 JET (4 CYLINDER) - 115 (4 CYL.)
FORMULA 1 2 LITRE (EFI) - FORMULA I (2 LITRE EFI)6/8/SAILMATE 9.9/SAILPOWER 15 HP - 8
100/115/125 HP 80 JET (4 CYLINDER) - 115 (4 CYL.)6/8/SAILMATE 9.9/SAILPOWER 15 HP - 6
6/8/SAILMATE 9.9/SAILPOWER 15 HP - 9.940/40 LIGHTNING XR/50 - 40 (International)
75/90 HP 65 JET (3 CYLINDER) - 90 (3 CYL.)225 AND 225 SEAPRO/MARATHON (3.0L CARB) - 225 (3.0L CARB)
100/115/125 HP 80 JET (4 CYLINDER) - 80 JET4/5HP 2-STROKE - 5 (2-STROKE)
9.9/15/18 HP (2 CYLINDER)(INTERNATIONAL) - 9.9 (2 CYL.) (International)40/40 LIGHTNING XR/50 - 50MH
2.5L EFI 2.5L EFI OFFSHORE - MERC/MAR 2.5L (EFI)/(EFI-OFFSHORE)75/90 HP 65 JET (3 CYLINDER) - 75 (3 CYL.)
XR/MAGNUM 10/SEAPRO/MARATHON 10/SEAPRO/MARATHON 15 - 10 MARATHON4/5 HP - 4/5
75/90 HP 65 JET (3 CYLINDER) - 65 JET (3 CYL.)75/90 HP 65 JET (3 CYLINDER) - 65 JET
6/8/SAILMATE 9.9/SAILPOWER 15 HP - 1550/55/60 JET 45 - 50 (3 CYL.)
200 DFI 3.0L - 200 (DFI)HI PERF MERC/MAR S3000 - S3000
XR/MAGNUM 10/SEAPRO/MARATHON 10/SEAPRO/MARATHON 15 - XR10XR/MAGNUM 10/SEAPRO/MARATHON 10/SEAPRO/MARATHON 15 - 15 SEA PRO
40/40 LIGHTNING XR/50 - 40 LIGHTNING XR (International)9.9/15/18 HP (2 CYLINDER)(INTERNATIONAL) - 15 (2 CYL.) (International)
6/8 HP INTERNATIONAL - 6 (2 CYL.)(2-STROKE)(International)225 AND 225 SEAPRO/MARATHON (3.0L CARB) - 225 SEAPRO (3.0L CARB)
2.5L/2.5L OFFSHORE EFI - 2.5L (EFI)/(EFI-OFFSHORE)25/25 JET/30HP (2 CYL/430CC) INTERNATIONAL - 25 Jet (2 CYL.)(2-STROKE)(International)
XR/MAGNUM 10/SEAPRO/MARATHON 10/SEAPRO/MARATHON 15 - 10 MAGNUM25/25 JET/30HP (2 CYL/430CC) INTERNATIONAL - 30 (2 CYL.)(2-STROKE)(International)
6/8/9.8 2-STROKE (INTERNATIONAL) - 8 SEAPRO (2 CYL.)(International)XR/MAGNUM 10/SEAPRO/MARATHON 10/SEAPRO/MARATHON 15 - 15 MARATHON
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