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Working on 1979 Mercruiser 470 (serial number 5120717).
Working on 1979 Mercruiser 470 (serial number(###) ###-####. Outdrive is a pre-Alpha (MC-1)I am replacing the impeller today. Watched a video in which a guy hooked a drill up to the shaft of a lower u… read more
Ted G.
Ted G.
Rigger, Diagnostician
Vocational, Technical or Trade Scho
2,678 satisfied customers
Kerry! Mercruiser ALPHA 1 had a nice shifting alpha 1 but
Kerry! Mercruiser ALPHA 1 had a nice shifting alpha 1 but noise was coming from between engine and lower unit. Removed out drive to replace gimble bearing,seal,drive shaft bellows, EX bellows,raw wate… read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
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I have a 24' mach 1 1986 my lower unit is cracked and I just
I have a 24' mach 1 1986 my lower unit is cracked and I just picked one up but its a 1.84 gear ratio will that work on my 350… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have just replaced a 175hp mercruiser 4.3 in a 1987 rinker
I have just replaced a 175hp mercruiser 4.3 in a 1987 rinker 20.6 with a cpo 357 alpha 4v 275hp. My question is can the new 1.81 out drive installed last year handle that load. The boat weights 2375 l… read more
Jason
Jason
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Vocational, Technical or Trade School
22,043 satisfied customers
Ive got a problem. Trying to remove my outdrive from the transom.
Ive got a problem. Trying to remove my outdrive from the transom. I have a 1991 searay bowrider with a mercruiser I/O 4 cylinder 3.0. It has an alpha one outdrive. Need to remove outdrive and motor. L… read more
orcamarine
orcamarine
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Vocational, Technical or Trade Scho
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I have a mercruiser 160HP and a mercruiser outdrive Alpha1.
I have a mercruiser 160HP and a mercruiser outdrive Alpha1. I can not find any identification numbers on the outdrive anywhere and the serial # XXXXX faded away. Will any mercruiser alpha 1 outdrive b… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a 21 ft. Bayliner Trophy without an engine. it is rigged
I have a 21 ft. Bayliner Trophy without an engine. it is rigged for a V8. I have the option to buy a 1989 Rinker deckboat that has a 5.0 L Mercruiser/outdrive. Would the engine/outdrive from the Rinke… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
Hi, I have a 1988 Renken 21 Cuddy. It has a 3.0 4cyl with
Hi, I have a 1988 Renken 21' Cuddy. It has a 3.0 4cyl with the Alpha One stern drive. Is it possible to install one of the 5.7 V-8 engines in this boat. Besides engine mounting and alignment issues, i… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
i have a 87 bayliner capri 19ft openbow with a 3.0 omc motor
i have a 87 bayliner capri 19ft openbow with a 3.0 omc motor has no outdrive can not find one . i was wondering if i could switch the motor to a merccrusier 3.7 and alpha 1 outdrive on this boat… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 1983 mercruiser alpha 1 3.0 and the shift cable between
I have a 1983 mercruiser alpha 1 3.0 and the shift cable between the engine and the outdrive is stuck. Result of a bad water pump causing an over heat. Cable got melted and I need to replace it. Can y… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I cannot identfy the numbers on the rig I got, upper and lower
I cannot identfy the numbers on the rig I got, upper and lower unit decals are ruined not legible the engine number is(NNN) NNN-NNNN 4cyl. cover ident .120 hp could be 153 cid., the transom plate show… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
Im tring to determine what type of mercruiser outdrive is on
Im tring to determine what type of mercruiser outdrive is on my boat there are no visable markings. The year in question is 1979, motor 470 merc inline 3.7 ltr. would that be pre alpha? alpha one? to … read more
Master Tech
Master Tech
Service Manager/Technician
Vocational, Technical or Trade Scho
1,167 satisfied customers
I have a 5.7 mercruiser 1998 model with a busted lower unit,
I have a 5.7 mercruiser 1998 model with a busted lower unit, it looks like the stern drive is a 1.62 ratio. I have acess to a lower unit off of a stern drive with a 1.94 ratio, my question is it ok to… read more
James
James
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Vocational, Technical or Trade Scho
4,094 satisfied customers
i bought a 23 1988 sea ray boat with no type of drive train
i bought a 23' 1988 sea ray boat with no type of drive train left in it i am wanting to put a 350 chevrolet motor in it what all do i need to complete the drive train assembly besides the sterndrive a… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
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I have a 91 Bayliner with a 3.0 liter. I dont know what lower
I have a 91 Bayliner with a 3.0 liter. I dont know what lower unit it has Gen I or Gen II. Engine ser #OD428151 and outdrive ser# XXXXX can you help please?… read more
mercmastertech
mercmastertech
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Technical School
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I have a 1999 mercruiser 4.3 with a alpha 1 outdrive .the outdrive
I have a 1999 mercruiser 4.3 with a alpha 1 outdrive .the outdrive is up in trailer position and I can not get it to lower My pump is working as I checked the hydrulic lines and amgetting pessure.… read more
gearheadII
gearheadII
Bachelor's Degree
138 satisfied customers
Good Morning, Have a couple boats. One a 1972 IMP with a 302
Good Morning, Have a couple boats. One a 1972 IMP with a 302 ford v-8. What out drive does it have? The stickers are worn off. The other boat is a 1988 wellcraft sportsman 250 with twin inboards 3.8 l… read more
Pappy's Sales and Service
Pappy's Sales and Service
Vocational, Technical or Trade Scho
586 satisfied customers
Hi Sir, I fix this boat now Hull Identification RGMP1239A888
Hi Sir, I fix this boat now Hull Identification RGMP1239A888 like to know what size engine and out drive, its has no engine or out drive at all can you tell me anything about this boat, its a Regal 19… read more
Captain Dave
Captain Dave
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Master's Degree
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

2,678 satisfied customers

40 years boating, Safe boating instruct., Offshore Race promoter, Failure Analysis, Expert Witness

Dominick

Dominick

Marine Mechanic

1,009 satisfied customers

25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified

John White

John White

Marine Mechanic

306 satisfied customers

11 years experience working on outboards, inboards, sterndrives & pwcs

Jason

Jason

Marine Mechanic

22,043 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,409 satisfied customers

40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.

Jeff G.

Jeff G.

Marine Mechanic

4,730 satisfied customers

42 years experience, Certified Master Technician, All Major Outboards, Sterndrives, Hi-Performance

Captain Dave

Captain Dave

Marine Mechanic

2,672 satisfied customers

USCG Licensed Captain, 20+ Years Boating, Fishing, Maintenance and Repair Experience

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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