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O-Ring Mercruiser 25-25439 

# 525-25-25439
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O-Ring Mercruiser 25-25439

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Applications Where This Item Is Used:

465 HP ENGINE - 465 (GEN. V) GM 502 V-8 1992-1994MERC 650 (3 CYLINDER) - 650 (3 CYL.)
MERC 1500 - 1500ALPHA-ONE SS, II SSM, III, III SSM, IIIA SSM, IV SSM, V SSM - ALPHA ONE SS 1986-1989
120/140 (1.98 RATIO) 165 (1.65 RATIO) 470/485 (1.84 RATIO) 260/898/228 (1.50 RATIO) - 165 1978-1981MARK 55 - MARK 55, 55E
200XS SST - 200XS SST90 HORSEPOWER - 90 (6 CYL.)
525 HP ENGINE - 525 SC (GEN. V) GM 454 V-8 1992-1995500 BULLDOG - 500 Bulldog 1999-2001
220 HP (V-6) - V-220135/140/150/200/XR6/MAGNUM III/140JET (2.5L)(CARB) - 140 JET
MARINER 85 - 85888 STERN DRIVE (1.50) RATIO - 888 1971-1977
5.7L/LX 350 MAG ALPHA/BRAVO - 5.7LX (4 BBL) GM 350 V-8 1996MERC 950 - 950 (6 CYL.)
XR-2 MAGNUM - MERC/MAR XR2/MAGNUMK20-140-160 STERN DRIVE - 120/140 1967-1969
MERC 800E - 800 (4 CYL.), 80 (4 CYL.)MERC 850 (4 CYLINDER) - 850 (4 CYL.)
135/150/175/200 XR6 MAGNUM III 105-140 JET - 140 JETMERC 1150E-SS - 1150
225-S/233 (1.32 RATIO) STERN DRIVE - 233 1975-197740 HP30 JET - 40 (4 CYL.)
260 ENGINE (G.M.) - 260 (4 BBL.) GM 350 V-8 1978-1982135 HP/ 150 HP (V-6) - V-135
225 (EFI) PRO-MAX/SUPER MAGNUM - 225 EFI PRO MAX/SUPER MAG35 HP - 35 (2 CYL.)
500 BULLDOG - 500 Bulldog135/150 DFI (2.5L) - V-135 DFI (2.5L)
MERC 3.4L EFI - MERC 3.4 (EFI)135/140/150/200/XR6/MAGNUM III/140JET (2.5L)(CARB) - MAGNUM III
5.7L/LX 350 MAG ALPHA/BRAVO - 350 MAG. ALPHA (4 BBL.) GM 350 V-8 1996135/150/175 DFI (2.5L) - 110 Jet (2.5L)
90 ENGINE AND STERNDRIVE - 90 RENAULT 96 I/L4 1970-1972MERC 1000 - 1000SS
135/140/150/200/XR6/MAGNUM III/140JET (2.5L)(CARB) - V-140 (INTERNATIONAL)ACCESSORIES MERCRUISER VOLUME I - Power Steering/Tiller Handles/ Shift Kits
MERC 850E - 850 (6 CYL.)EXHAUST/COOLING SYSTEMS AND EXTENSION KITS - Exhaust / Cooling Systems and Extension Kits
135/150/175/200/XR6/MAGNUM III - XR-6MERC 1000E-2 - 1000
MERC 800 - 800 (6 CYL.)140 HORSEPOWER - 140
MERC 500 - 500ACCESSORIES MERCRUISER VOLUME I - Exhaust / Cooling Systems and Extension Kits
2.5L/2.5L OFFSHORE EFI - 2.5L (EFI)/(EFI-OFFSHORE)200XS DFI (2.5L) ROS - 200XS DFI (2.5L) ROS
MOD-VP - MERC MOD-VPMERC 70 (3 CYLINDER) - 70 (3 CYL.)
175 XRI /175 MAGNUM 200 XRI (EFI) - V-175 (MAG/EFI)39/40 HP - 40 (1 CYL.)
135/150 HP (V-6) - V-135175 HP (V-6) - V-175
MERC 1400EL-SS - 1400135/150/175/200 XR6/MAGNUM III/140 JET (CARB) - 140 JET
TR (200 RATIO) TRS (1.50 RATIO) STERN DRIVE - TR/TRS 1977-1993MERC 115 - 115 (6 CYL.)
120 HP/2.5L140 HP/3.0L R/MR/ALPHA ONE - 2.5L GM 153 I/L4 1987-1989135/150/175/200 XR6 MAGNUM III 105-140 JET - XR-6
135 / 150 / 175 200(2.5L) XR4/MAGNUM II - V-175R/MR ALPHA ONE STERNDRIVE - R/MR/ALPHA ONE (Transom Assembly) 1983-1990
200/5.0L/LX 260/5.7L 350 MAG ALPHA/BRAVO - 5.0LX (4 BBL.) GM 305 V-8 1988-1995120/140 (1.98 RATIO) 165 (1.65 RATIO) 470/485 (1.84 RATIO) 260/898/228 (1.50 RATIO) - 228 1978-1982
80 ENGINE AND 80 STERNDRIVE - 80 RENAULT 80 I/L4 1966-1969HP 500 (502 CID) - 500 (GEN. V) GM 502 V-8 1996
228 ENGINE (G.M.) - 228 MIE (4 BBL.) GM 305 V-8 1979-1980135/150/175/200/XR6/MAGNUM III - 105 JET
35 HP - 35135/150/175/200/XR6/MAGNUM III - V-175
50/60 HP (3 CYLINDER) - 60 (3 CYL.)2.4L (EFI) BASS/OFFSHORE - MERC/MAR 2.4L (EFI)
60 RENAULTMERCRUISER "0" DRIVE UNIT - 0 (Sterndrive) 1965-1966135/150/175/200 XR6/MAGNUM III/140 JET (CARB) - V-175
898/200/228/230/260 HP R/MR/ALPHA ONE - 260 (4 BBL.) GM 305 V-8 1982-198690 ENGINE AND STERNDRIVE - 90 (Sterndrive) 1970-1972
150 / 175 / 200 XRI - V-150 (MAG/EFI)135/150/175/200/XR6/MAGNUM III - MAGNUM III
250/275 HP - 250/275500 EFI - 500 EFI
650-4 ENGINE - 650 (4 CYL.)1A-1B-1C STERN DRIVES - IA/IB/IC 1964
MERC 400 - 400150 HP XR-2 MARATHON MAGNUM (V-6) (1978-1985 COMBINED BOOK) - V-150 Magnum
450 HP (454 CID) 7.4L ENGINE - 450 (GEN. V) GM 454 V-8 1995-1996150/200 PRO-MAX/SUPER MAGNUM (EFI) - 150 EFI PRO MAX/SUPER MAG
MERC 500-7/8 - 500MERC 900E - 900 (6 CYL.)
200 EFI PROMAX/SUPERMAGNUM - 200 EFI PRO MAX/SUPER MAGBRAVO I/II/III STERNDRIVE AND TRANSOM ASSEMBLY - BRAVO ONE
525 EFI - 525 EFI150 PRO XS (2.5L) - 150 Pro XS (2.5L)
MERC 90 - 90 (6 CYL.)525 SC - GEN VI - 525 SC - Gen VI
ALPHA ONE GEN II STERNDRIVE AND TRANSOM ASSEMBLY - ALPHA ONE (GEN.II) 1991-1995135/150/175/200 XR6/MAGNUM III/140 JET (CARB) - XR-6
500 HP 8.2L (502 CI) ENGINE - 500 (GEN. V) GM 502 V-8 1994-1995898 (1.50 RATIO) 1228 (1.50 RATIO) 1250 (1.32 RATIO) - 250 1977
MERC 700-1/2 - 700 (6 CYL.)XR-2 - MERC XR2
HP 500 BULLDOG (540 CID) - 500 Bulldog GM 540 V-8 1990-1996135/150/175/200 XR6/MAGNUM III/140 JET (CARB) - MAGNUM III
135 / 150 / 175 200(2.5L) XR4/MAGNUM II - V-200 (2.5L) 1991 ONLY200/5.0L/LX 260/5.7L 350 MAG ALPHA/BRAVO - 200 (2 BBL.) GM 305 V-8 1987
2.5 L (CARB) - MERC/MAR 2.5L (CARB)MERC 1000E - 1000
MERC 1250 - 1250200 HP (V-6) (1978-1988 COMBINED BOOKS) - V-200
898/200/228/230/260 HP R/MR/ALPHA ONE - 200 (2 BBL.) GM 305 V-81 1985-1986215H AND 215E STERN DRIVE - 215H 1970
XR-4/MAGNUM II - XR-4135/150/175/200 XR6 MAGNUM III 105-140 JET - V-150
MERC 140 - 1400, 140135/140/150/200/XR6/MAGNUM III/140JET (2.5L)(CARB) - V-200
175 SKI (EFI) (V-6) - V-175 (SKI)898/200/228/230/260 HP R/MR/ALPHA ONE - 898 (2 BBL.) GM 305 V-8 1983-1984
135/150/175/200 XR6 MAGNUM III 105-140 JET - V-200135/150/175/200 XR6 MAGNUM III 105-140 JET - V-175
45 HP - 45 (4 CYL.)225 EFI PROMAX/SUPERMAGNUM - 225 EFI PRO MAX/SUPER MAG
565 EFI - 565 EFIMERC 80 - 800 (4 CYL.), 80 (4 CYL.)
40 HP30 JET - 30 JET135/140/150/200/XR6/MAGNUM III/140JET (2.5L)(CARB) - XR-6
120/140/165 STERN DRIVE - 165 1970-1977MERC 650E - 650 (3 CYL.)
525 HP ENGINE - 525 SC (GEN. V) GM 454 V-8 1996120/140 (1.98 RATIO) 165 (1.65 RATIO) 470/485 (1.84 RATIO) 260/898/228 (1.50 RATIO) - 485 1980-1982
MARINER 70 - 70150/175/200 EFI - V-150 (EFI)
135/150/175/200/XR6/MAGNUM III - V-150MARINER 80 - 80
MERC 1100 - 110090/115 HP (INLINE) - 115 (6 CYL.)
K20-140-160 STERN DRIVE - 160 1967-196945/50 HP - 50 (4 CYL.)
225-S/233 (1.32 RATIO) STERN DRIVE - 225-S 1974BRAVO I/II/III STERNDRIVE AND TRANSOM ASSEMBLY - BRAVO TWO
MERC 402 - 402175 HP V-6 (1976-1988 COMBINED BOOKS) - V-175
2.5L EFI 2.5L EFI OFFSHORE - MERC/MAR 2.5L (EFI)/(EFI-OFFSHORE)120 HP/2.5L140 HP/3.0L R/MR/ALPHA ONE - 3.0L GM 181 I/L4 1987-1989
120 HP/2.5L140 HP/3.0L R/MR/ALPHA ONE - 140 GM 181 I/L4 1982-19863.4 LITRE - 300 (3.4 LITRE)
200 HP (V-6) - V-200MERC 1350 - 1350
MERC 115 - 1150, 115MERCURY 70 - 70 (3 CYL.)
200/5.0L/LX 260/5.7L 350 MAG ALPHA/BRAVO - 350 MAG. ALPHA GM 350 V-8 1987-199580 HORSEPOWER - 80
150/200 EFI (2.5L) - V-150 EFI (2.5L)39/40 HP - 39 (1 CYL.)
135/140/150/200/XR6/MAGNUM III/140JET (2.5L)(CARB) - V-150600 SCI - 600 SCi
2.4 L (CARB) - MERC/MAR 2.4L (CARB)MERC 650 - 650 (4 CYL.)
135 / 150 / 175 200(2.5L) XR4/MAGNUM II - XR-4135/150/175/200 XR6/MAGNUM III/140 JET (CARB) - V-150
ALPHA-ONE SS, II SSM, III, III SSM, IIIA SSM, IV SSM, V SSM - SSM II/III/IV/V 1982-1995MERC 850 - 850 (4 CYL.)
MERC V-225 - V-225R/MR ALPHA ONE STERNDRIVE - R/MR/ALPHA ONE (Sterndrive) 1983-1990
MERC 80 - 800 (4 CYL. ), 80 (4 CYL.)150 / 175 / 200 XRI - V-175 (SKI)
MERC 40 - 40 (1 CYL.)225X EFI PROMAX - 225X EFI PROMAX
MARINER 90 - 90 (6 CYL.)60 RENAULTMERCRUISER "0" DRIVE UNIT - 60 RENAULT 68 I/L4 1965-1968
150 HP XR-2 MARATHON MAGNUM (V-6) (1978-1985 COMBINED BOOK) - V-150-XR-2MERC 40 - 402, 40 (2 CYL.)
MARK 35A MERC 300/350 - 300 350150 HP XR-2 MARATHON MAGNUM (V-6) (1978-1985 COMBINED BOOK) - V-1500
200XS DFI (2.5L) - 200XS DFI (2.5L)115/135/150 DFI (2.5L) - V-135 DFI (2.5L)
135/150/175/200 XR6/MAGNUM III/140 JET (CARB) - V-200MERC 500-6 - 500
BRAVO I/II/III STERNDRIVE AND TRANSOM ASSEMBLY - BRAVO THREE120/140 (1.98 RATIO) 165 (1.65 RATIO) 470/485 (1.84 RATIO) 260/898/228 (1.50 RATIO) - 470 1978-1982
75 HP - 75 (4 CYL.)150/175/200 EFI (2.5L) - V-150 EFI (2.5L)
MERCRUISER I STERN DRIVE UNIT - I 1963MERC 450/500 - 450 (4 CYL.)
70 HORSEPOWER - 70228 ENGINE (G.M.) - 228 (4 BBL.) GM 305 V-8 1979-1982
120 HP/2.5L140 HP/3.0L R/MR/ALPHA ONE - 120 GM 153 I/L4 1983-19862.5L (CARB) - MERC/MAR 2.5L (CARB)
MERC 90 - 900, 90120/140 (1.98 RATIO) 165 (1.65 RATIO) 470/485 (1.84 RATIO) 260/898/228 (1.50 RATIO) - 120/140 1978-1982
175 XRI /175 MAGNUM 200 XRI (EFI) - V-175XRI (EFI)MERC 450/500 - 500
200 XRI (EFI) (V-6) - V-200 (EFI)470 STERN DRIVE - 470 1976-1977
135/150/175 DFI (2.5L) - V-175 DFI (2.5L)MERC 110 - 110
MERC 50 - 500, 502.5L EFI 2.5L EFI OFFSHORE - MERC/MAR 2.5L (EFI)
MERC 400 - 400 (2 CYL.)MARK 58, MARK 55A, MARK 58A - MARK 55AE, 55AM, 58AE, 58E
150/200 EFI PROMAX/SUPERMAGNUM - 150/200 EFI PRO MAX/SUPER MAG135/150/175/200 XR6 MAGNUM III 105-140 JET - MAGNUM III
150 HP XR-2 MARATHON MAGNUM (V-6) (1978-1985 COMBINED BOOK) - V-150 Marathon135/140/150/200/XR6/MAGNUM III/140JET (2.5L)(CARB) - V-135
135 / 150 / 175 200(2.5L) XR4/MAGNUM II - MAGNUM II2.4L EFI / 2.4L EFI OFFSHORE - MERC/MAR 2.4L (EFI)
175 SKI (EFI) - V-175 (SKI)MERC 75 - 75
150/175/200 EFI - V-175 (EFI)ACCESSORIES MERCRUISER VOLUME I - Fuel/Oil Tanks, Lines, Filter Kits and Corrosion
MARK 35A MERC 300/350 - MARK 35A150 / 175 / 200 XRI - V-150XRI (EFI)
135/150/175/200/XR6/MAGNUM III - 140 JET1A-1B-1C (E-Z SHIFT) - IA/IB/IC (EZ-SHIFT) 1965-1966
MERC 1150 - 1150MERC 140 - 140
90/115 HP (INLINE) - 90 (6 CYL.)575 SCI - 575 SCi
MERC 350 - 350MERC 60 - 60
898 (STERN DRIVE) 198 (INBOARD) ENGINE - 198 MIE (2 BBL.) GM 305 V-8 197745/50 HP - 45 (4 CYL.)
150 HP XR-2 MARATHON MAGNUM (V-6) (1978-1985 COMBINED BOOK) - V-150 Work1500XS - 1500XS
175 XRI /175 MAGNUM 200 XRI (EFI) - V-200XRI (EFI)60 HP - 60
80 ENGINE AND 80 STERNDRIVE - 80 (Sterndrive) 1966-1969200/5.0L/LX 260/5.7L 350 MAG ALPHA/BRAVO - 260 GM 350 V-8 1987
898 (1.50 RATIO) 1228 (1.50 RATIO) 1250 (1.32 RATIO) - 898/228 1977MOD - VP (EFI) - MERC MOD-VP (EFI)
MARINER 115 - 115 (6 CYL.)120/140 (1.98 RATIO) 165 (1.65 RATIO) 470/485 (1.84 RATIO) 260/898/228 (1.50 RATIO) - 898 1978-1982
175 PROXS (2.5L) - 175 PROXS (2.5L)215H AND 215E STERN DRIVE - 215E 1970-1972
120/140/165 STERN DRIVE - 120/140 1970-1977XR-4/MAGNUM II - MAGNUM II
II STERN DRIVE (1.78:1 GEAR RATIO) - II (1.78:1) 1968-1969200/5.0L/LX 260/5.7L 350 MAG ALPHA/BRAVO - 5.7L GM 350 V-8 1988-1995
135/150/175/200 XR6 MAGNUM III 105-140 JET - 105 JET115 HORSEPOWER - 115 (6 CYL.)
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