Refine Parts List
Liter/ CID/ Model #:
Year:

Liter/ CID/ Model #

Cyl.

Year

Serial#

Sierra New Alternator

Arco New Alternator

Protorque

Sierra Remanufactured Alternator

Arco Remanufactured Alternator

120 GM 4 1964-1975 1666601-4469865 18-5957 40147 PH300-0022 18-5951 20104
120 GM 4 1964-1982 1666601-6229717 18-5957 40147 PH300-0022 18-5951 20104
140 GM 4 1964-1981 2508261-6229717 18-5957 40147 PH300-0022 18-5951 20104
160 GM 6 1969 2768032-2770031 18-5957 40147 PH300-0022 18-5951 20104
165 GM 6 1970-1981 2770032-5813433 18-5957 40147 PH300-0022 18-5951 20104
185 GM V-6 1983-1984 6330183-6919655 18-5966 60050 PH300-0010 --
185 GM V-6 1985-1987 A331455-B527954 18-5966 60050 PH300-0010 --
200 GM V-8 1985-1986 6218462-B525981 18-5966 60050 PH300-0010 --
205 GM V-6 1985-1991 A331455-D714369 18-5966 60050 PH300-0010 --
225 Ford V-8 1973-1974 3385721-4166999 18-5957 40147 PH300-0022 18-5951 20104
228 GM V-8 1977-1986 4765100-B525981 18-5966 60050 PH300-0010 --
230 GM V-8 1977-1986 4765100-B525981 18-5966 60050 PH300-0010 --
233 Ford V-8 1975-1977 4173000-4902304 18-5957 40147 PH300-0022 18-5951 20104
250 GM V-8 1977 4768000-4908849 18-5957 40147 PH300-0022 18-5951 20104
255 Ford V-8 1973-1974 3258728-4175499 18-5957 40147 PH300-0022 18-5951 20104
255 GM V-8 1975-1976 4175500-4767999 18-5957 40147 PH300-0022 18-5951 20104
260 GM V-8 1978-1982 4908850-6218461 18-5957 40147 PH300-0022 18-5951 20104
260 GM V-8 1982-1986 6218462-B525981 18-5966 60050 PH300-0010 --
260 GM V-8 1982-1986 6218462-B525981 18-5966 60050 PH300-0010 --
330 GM V-8 1977-1981 4623115-6083144 18-5957 40147 PH300-0022 18-5951 20104
330 GM V-8 1982-1987 6083145-B816540 18-5966 60050 PH300-0010 --
420 GM V-8 1987-1989 A398941-B622418 18-5966 60050 PH300-0010 --
425 GM V-8 1990-1992 A398941-D937011 18-5966 60050 PH300-0010 --
465 GM V-8 1990-1994 C849992-F213244 18-5966 60050 PH300-0010 --
575 GM V-8 1986-1992 A677429-D763716 18-5966 60050 PH300-0010 --
888 Ford V-8 1971-1977 3108723 & Up 18-5957 40147 PH300-0022 18-5951 20104
898 GM V-8 1977-1982 4762210-6218461 18-5957 40147 PH300-0022 18-5951 20104
898 GM V-8 1983-1984 621462-B525981 18-5966 60050 PH300-0010 --
120 / 2.5L GM 4 1983-1989 6229718-C853255 18-5966 60050 PH300-0010 --
140/3.0L GM 4 1982-1989 6229718-C856558 18-5957 40147 PH300-0022 18-5951 20104
140/3.0L/3.0LX GM 4 1990-1992 C856559-D831100 18-5957 40147 PH300-0022 18-5951 20104
140/3.0LX GM 4 1992-UP D831101& Up 18-5966 60050 PH300-0010 --
200/5.0L GM V-8 1987-1995 B525982-F600999 18-5966 60050 PH300-0010 --
230/5.0L MIE GM V-8 1987-1988 5907058-B788151 18-5966 60050 PH300-0010 --
230/5.0LX GM V-8 1987-1995 B525982-F600999 18-5966 60050 PH300-0010 --
230/5.0LX GM V-8 1987-1995 B525982-F600999 18-5966 60050 PH300-0010 --
260/5.7L GM V-8 1987-1995 B525982-F600999 18-5966 60050 PH300-0010 --
260/5.7L MIE GM V-8 1987-1995 5907058-F746099 18-5966 60050 PH300-0010 --
340/7.4L MIE w/BW GM V-8 1981-1992 5889914-D715493 18-5966 60050 PH300-0010 --
198 MIE GM V-8 1977 4762210-6218461 18-5957 40147 PH300-0022 18-5951 20104
215 MCM &MIE Ford V-8 1970-1972 2781153-3563181 18-5957 40147 PH300-0022 18-5951 20104
225 MIE Ford V-8 1973-1974 3385721-4176999 18-5957 40147 PH300-0022 18-5951 20104
228 MIE GM V-8 1977-1980 4176999-5907057 18-5957 40147 PH300-0022 18-5951 20104
233 MIE Ford V-8 1975-1976 4173000-4775784 18-5957 40147 PH300-0022 18-5951 20104
255 MIE Ford V-8 1973-1974 3258728-4178299 18-5957 40147 PH300-0022 18-5951 20104
255 MIE GM V-8 1975-1980 4175500-5907057 18-5957 40147 PH300-0022 18-5951 20104
262 Mag. EFI GM V-6 1996-1997 F803800-K999999 18-5960 60060 PH300-0012 --
270 MCM & MIE GM V-8 1969-1972 2851074-3385720 18-5957 40147 PH300-0022 18-5951 20104
280 TRS GM V-8 1975-1976 4176250-4770199 18-5957 40147 PH300-0022 18-5951 20104
300 MR TEMPEST GM V-8 1985-1986 6668677-B430367 18-5966 60050 PH300-0010 --
300 TR TEMPEST GM V-8 1985-1986 6668677-B430367 18-5966 60050 PH300-0010 --
320 EFI GM V-8 1987-1989 A543604-C622418 18-5966 60050 PH300-0010 --
325 MCM & MIE GM V-8 1970-1974 2761142-3780449 18-5957 40147 PH300-0022 18-5951 20104
330 MIE GM V-8 1977-1980 4623115-5889913 18-5957 40147 PH300-0022 18-5951 20104
350 Mag EFI Ski GM V-8 1994-1997 F215561-K999999 18-5965 60065 PH300-0016 --
350 Mag MPI Ski GM V-8 1995-1996 F350583-F799999 18-5965 60065 PH300-0016 --
350 Mag MPI Ski GM V-8 1998-up L002600& Up 18-5960 60060 PH300-0012 --
350 Mag Ski GM V-8 1991-1996 D505450-K040399 18-5966 60050 PH300-0010 --
350 Mag Ski GM V-8 1997 K040400-K999999 18-5967 60055 PH300-0011 --
350 Mag. Alpha GM V-8 1997 K001527-K999999 18-5967 60055 PH300-0011 --
350 Mag. Alpha GM V-8 1986-1995 A635178-F600999 18-5966 60050 PH300-0010 --
350 Mag. Alpha GM V-8 1987-1996 B525982-K001526 18-5966 60050 PH300-0010 --
350 Mag. EFI & MPI GM V-8 1995-1996 F415189-K001500 18-5965 60065 PH300-0016 --
350 Mag. EFI & MPI GM V-8 1997-up K001501& Up 18-5960 60060 PH300-0012 --
350 Mag.MPI MIE GM V-8 1998-up L002008& Up 18-5960 60060 PH300-0012 --
350 MIE GM V-8 1974-1976 3780450-4623109 18-5957 40147 PH300-0022 18-5951 20104
370 TRS GM V-8 1978-1985 4179554-6721527 18-5957 40147 PH300-0022 18-5951 20104
370 TRS GM V-8 1978-1987 4179554-B714586 18-5966 60050 PH300-0010 --
370 TRS GM V-8 1985-1987 6721528-B714586 18-5966 60050 PH300-0010 --
390 MCM & MIE GM V-8 1969-1970 2781129-3042731 18-5957 40147 PH300-0022 18-5951 20104
4.3L GM V-6 1992 & Up D714107 & Up 18-5967 60055 PH300-0011 --
4.3LH GM V-6 1998-up L010044& Up 18-5967 60055 PH300-0011 --
4.3LX GM V-6 1992-1997 D714107-K999999 18-5967 60055 PH300-0011 --
4.3LX GM V-6 1996-1997 F803000-K999999 18-5967 60055 PH300-0011 --
4.3LXH GM V-6 1992-1997 D714107-K999999 18-5967 60055 PH300-0011 --
4.3LXH GM V-6 1996-1997 F803000-K999999 18-5967 60055 PH300-0011 --
400 TRS GM V-8 1980-1986 4179554-B457644 18-5957 40147 PH300-0022 18-5951 20104
400 TRS GM V-8 1980-1986 4179554-B457644 18-5966 60050 PH300-0010 --
440 TRS GM V-8 1983-1986 4179554-B457644 18-5957 40147 PH300-0022 18-5951 20104
440 TRS GM V-8 1983-1986 4179554-B485220 18-5966 60050 PH300-0010 --
454 EFI Ski GM V-8 1995-1996 F215800-F820099 18-5965 60065 PH300-0016 --
454 Mag. GM V-8 1986-1994 A631894-F304999 18-5966 60050 PH300-0010 --
454 Mag. GM V-8 1995-1997 F305000-K999999 18-5966 60050 PH300-0010 --
454 Mag. MPI GM V-8 1994-1997 F115700-K999999 18-5965 60065 PH300-0016 --
454 Mag. MPI GM V-8 1998-up L010029& Up 18-5960 60060 PH300-0012 --
454 Mag. MPI MIE GM V-8 1996-1997 F820100-K999999 18-5965 60065 PH300-0016 --
454 Mag. MPI MIE GM V-8 1998-up L002200& Up 18-5960 60060 PH300-0012 --
460 TRS GM V-8 1983-1986 4179554-6181046 18-5957 40147 PH300-0022 18-5951 20104
460 TRS GM V-8 1983-1986 4179554-6181046 18-5966 60050 PH300-0010 --
5.0L GM V-8 1998-up L015751& Up 18-5967 60055 PH300-0011 --
5.0L EFI GM V-8 1998-up L015751& Up 18-5960 60060 PH300-0012 --
5.7L GM V-8 1996 F601000-K001526 18-5966 60050 PH300-0010 --
5.7L GM V-8 1997-up K001527& Up 18-5967 60055 PH300-0011 --
5.7L EFI GM V-8 1995-1996 F225560-K001505 18-5965 60065 PH300-0016 --
5.7L EFI GM V-8 1997 K001506-K999999 18-5960 60060 PH300-0012 --
5.7L EFI GM V-8 1998-up L010035& Up 18-5960 60060 PH300-0012 --
5.7L EFI MIE GM V-8 1997 K040300-K999999 18-5960 60060 PH300-0012 --
5.7L MIE GM V-8 1977-up K040307& Up 18-5967 60055 PH300-0011 --
5.7L MIE GM V-8 1994-1996 F622151-K040306 18-5966 60050 PH300-0010 --
5.7L Ski GM V-8 1996 F775200-K040003 18-5966 60050 PH300-0010 --
5.7L Ski GM V-8 1997 K040004-K999999 18-5967 60055 PH300-0011 --
5.7L Ski GM V-8 1985-1995 A338533-F775199 18-5966 60050 PH300-0010 --
5.7L Ski GM V-8 1998-up L002005& Up 18-5967 60055 PH300-0011 --
5.7LX GM V-8 1996 F601000-K001526 18-5966 60050 PH300-0010 --
5.7LX GM V-8 1997-up K001527& Up 18-5967 60055 PH300-0011 --
5.7LX EFI GM V-8 1997 K001506-K999999 18-5960 60060 PH300-0012 --
5.7LX EFI GM V-8 1995-1996 F225560-K001505 18-5965 60065 PH300-0016 --
500 Bulldog GM V-8 1990-1996 C577254& Up 18-5966 60050 PH300-0010 --
502 Mag. Bravo GM V-8 1990-1993 C878221-F114528 18-5966 60050 PH300-0010 --
502 Mag. MPI GM V-8 1998-up L017000& Up 18-5960 60060 PH300-0012 --
525 SC GM V-8 1991-1997 D456000 & Up 18-5966 V PH300-0010 --
600 SC GM V-8 1991-1996 D456489-F877642 18-5966 60050 PH300-0010 --
7.4L GM V-8 1988-1997 B771113-K999999 18-5966 60050 PH300-0010 --
7.4L EFI & MPI MIE GM V-8 1995-1997 F563052-K999999 18-5965 60065 PH300-0016 --
7.4L MIE GM V-8 1989-1996 C391564-F820141 18-5966 60050 PH300-0010 --
7.4L MIE GM V-8 1992-1997 D715494-K999999 18-5966 60050 PH300-0010 --
7.4L MPI GM V-8 1998-up L010003& Up 18-5960 60060 PH300-0012 --
7.4L MPI MIE GM V-8 1998-up L002006& Up 18-5960 60060 PH300-0012 --
7.4LX EFI & MPI GM V-8 1996-1997 F602010-K999999 18-5965 60065 PH300-0016 --
8.2L MIE GM V-8 1990-1996 C878221-F819619 18-5966 60050 PH300-0010 --
8.2L MIE GM V-8 1993-1996 D857200-F819619 18-5966 60050 PH300-0010 --
8.2L MPI MIE GM V-8 1996-1997 F819620-K999999 18-5965 60065 PH300-0016 --
8.2L MPI MIE GM V-8 1998-up L002450& Up 18-5960 60060 PH300-0012 --
Black Scorpion 350 CID GM V-8 1996 F800000-K040000 18-5965 60065 PH300-0016 --
Black Scorpion 350 CID GM V-8 1997-up K040001& Up 18-5960 60060 PH300-0012 --
Black Scorpion 350 CID GM V-8 1997-up K040001& Up 18-5960 60060 PH300-0012 --

Liter/ CID/ Model #

Cyl.

Year

Serial#

Sierra New Alternator

Arco New Alternator

Protorque

Sierra Remanufactured Alternator

Arco Remanufactured Alternator

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Price: $115.90
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Part # 18-5941
2nd Day Air for $4.99 More Eligible
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Part # 18-5951
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Mercury Marine 78403A 1 replacement parts
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Price: $167.40
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Part # 18-5956
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Part # 18-5960
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Part # 18-5983
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Part # 18-6298
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Part # 18-5967
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Part # 20102
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Part # 20300
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Part # 20815
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Mercury Marine, Mercruiser Inboard Replacement Inboard Alternator 60055 - Arco
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Part # 60060
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Mercury Marine, Mercruiser Inboard Replacement Inboard Alternator 60055 - Arco
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Part # 65055
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Mercury Marine, Mercruiser Inboard Replacement Inboard Alternator 60055 - Arco
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Part # 60055
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Mercury Marine, Mercruiser Inboard Replacement Inboard Alternator 60055 - Arco
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Part # 60065
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Part # 40147
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Part # PH300-0008
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Part # PH300-0008-OE
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Part # PH300-0010
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Part # PH300-0011
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Part # PH300-0022
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Part # PH300-0026-OE
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Part # PH300-0035
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Part # 18-6960
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Part # PH300-0013
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Part # 817119A4
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Part # 862030T01
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Part # 862031T1
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Sierra
Average Customer Review for Alternator - 18-5956 - Sierra
Full StarFull StarFull StarFull StarFull Star
Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull Star
alternator
by John from High Springs, Florida on October 30, 2012
This is the exact one I was looking for. Happy we were able to find a perfect match. Thanks for the quick service.
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Average Customer Review for Alternator - 18-5957 - Sierra
Full StarEmpty StarEmpty StarEmpty StarEmpty Star
Based On 1 Review | Write Review
Full StarEmpty StarEmpty StarEmpty StarEmpty Star
Alternator
by William from Chapel Hill, North Carolina on May 21, 2012
The product came as promised and worked fine.
(6 of 12 people found this review helpful)
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Average Customer Review for Alternator - 18-5966 - Sierra
Full StarFull StarFull StarFull StarFull Star
Based On 2 Reviews | Write Review
Full StarFull StarFull StarFull StarFull Star
great
by Gerzain from Tracy, California on August 29, 2011
great part guys well done. thank you
(1 of 1 people found this review helpful)
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Full StarFull StarFull StarFull StarFull Star
It fit's
by Les from Berrien Springs, Michigan on August 09, 2011
This was a easy installation and it works. thank you two thumbs up. LES
(1 of 1 people found this review helpful)
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Full StarFull StarFull StarFull StarFull Star
Works great installed great
by a Customer from Littleton, Colorado on May 29, 2012
I would recommend, the install when great and ran it all weekend, but of my batteries were charged well.
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Full StarFull StarFull StarFull StarFull Star
This alternator has exceeded my expectations.
by Joshua from Arcadia, Utah on August 08, 2011
So far the alternator has been great.
(1 of 1 people found this review helpful)
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Based On 2 Reviews | Write Review
Full StarFull StarFull StarEmpty StarEmpty Star
Ok
by Troy from Somerville, Ohio on August 10, 2016
Quality product. Wiring info and hardware would be nice
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Full StarFull StarFull StarFull StarFull Star
iboats came through again!
by Lauris from Gonvick, Minnesota on September 19, 2015
I was beached by a worn out alternator on my MercCruiser engine. I contacted iboats ordered a replacement that was to be shipped in two days. They did not have it in stock and it was back-ordered. (This could take weeks to get). Iboats came through in just a week with the new alternator delivered to my door and I am happily back on the water again. Not only did they respond quickly, but the price was the lowest of all the places I checked. Thanks iboats!!
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Q:
I have a 1986 Mercruiser 228 with an alternator?
A:
We would need engine serial number to confirm. Contact us at the number a the top of the page with that info.


Q:
Where is this altenator made? Korea or ?
A:
The warehouse that makes these products is located in Florida.


Q:
Will this fit 87 omc 3.0 liter?
A:
We will actually need your engine model number in order to match up correct alternator.


Q:
WILL THIS FIT IN A 1994 FOUR WINNS SUNDOWNER 195, 5.0 LITER 190 HP ? IT IS NOT FUEL INJECTED, CARBERATOR?
A:
It will depend on the engine manufacturer as well. If you can provide that along with a serial/model number, we will take a look for you.


Q:
Cant i just buy a alternator for a ford ranger with 2.3liter engine?
A:
Well we have no way of matching it up by car as we can only match it up by marine application. The engines this replaces is marine grade.


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