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Working on lower unit of a Mercruiser MC-1 (pre-Alpha)
Working on lower unit of a Mercruiser MC-1 (pre-Alpha) outdrive. Actually 2 of them. Replaced impeller on one. I'll will call that the 470 drive. That drive has been sitting for three years. The origi… read more
Jason
Jason
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Vocational, Technical or Trade School
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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.
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Vocational, Technical or Trade Scho
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After impeller replacement, can't put lower prop section
after impeller replacement, can't put lower prop section back on. resistance when about 1/2 inch separation … read more
Noel Schembri
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Trying to put my Alpha 1 outdrive on and when i went to turn
Trying to put my Alpha 1 outdrive on and when i went to turn the prop counter clockwise to line up the splines i cannot turn the prop counter clockwise. … read more
Jason
Jason
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Vocational, Technical or Trade School
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I just installed a water pump impeller in my alpha 1 outdrive.
I just installed a water pump impeller in my alpha 1 outdrive. I'm having troublel stabbing the lower gear case back onto the uppper gear case. Any helpful hints?… read more
Jason
Jason
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Vocational, Technical or Trade School
22,804 satisfied customers
Mercruiser 228 MCM over heating I replaced the lower unit
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James
James
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Vocational, Technical or Trade Scho
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how can you tell if the water tube is ingaged in the water
how can you tell if the water tube is ingaged in the water pump coupler inside of a Gen II alpha drive?… read more
James
James
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Vocational, Technical or Trade Scho
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i just changed the impeller in my outdrive(alpha 1) now when
i just changed the impeller in my outdrive(alpha 1) now when i am putting the lower unit back on the prop is just spinning what do I need to do to get it to stay in gear? I took it off in gear I figur… read more
James
James
Marine Mechanic
Vocational, Technical or Trade Scho
4,111 satisfied customers
I have a mercruiser outdrive on a 50 houseboat. Think it
I have a mercruiser outdrive on a 50' houseboat. Think it is a '75 model 228. The outdrive has a 1 1/8 " spline and uses a 17 inch 13 pitch prop. All this, I have been told by those trying to help me.… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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I have a 4.3 l mercruiser, Today i was on the water and went
I have a 4.3 l mercruiser, Today i was on the water and went to take off and it went about 10 feet then stopped. The motor ran but the prop was not spinning and as i was trying to figure out why the p… read more
James
James
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Vocational, Technical or Trade Scho
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I just replaced the impeller and water pump on a 7.5 Mercury
I just replaced the impeller and water pump on a 7.5 Mercury outboard motor (1975). I am having a hard time putting the lower unit back up into the motor tail housing. I have tried to move the gear sh… read more
Steve Sr.
Steve Sr.
No Title
High School or GED
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Changed out water pump, now having trouble getting gear end
Changed out water pump, now having trouble getting gear end back on. woundering if there is a special way or trick to putting it back together?… read more
Joe
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I need info on water pump replacement on a 1995 Evinrude 150
I need info on water pump replacement on a 1995 Evinrude 150 Intruder. I would like to do it myself as time is of the essence. Thanks Jeff in CT… read more
Steve Sr.
Steve Sr.
No Title
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I have an alpha one outdrive and if i try to run it submerged
I have an mercury marine alpha one outdrive and if i try to run it submerged in a tank it overheats, does the boat need to be in moving water for the impeller to function. the impeller was just replac… read more
Larry B.
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High School or GED
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I need guidance on replacing the water pump impeller on a 1998
I need guidance on replacing the water pump impeller on a 1998 Mercruiser Alpha One Gen II. Background: I have a 1998 Sea Ray 185 with a Mercruiser 4.3 with Alpha One Gen II drive. Two years ago the l… read more
Michael
Michael
master marine technician/charter captain
Vocational, Technical or Trade Scho
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Have a 1990 Bayliner mercury 4.3 Alpha 1 6 cylinder. After
Have a 1990 Bayliner mercury 4.3 Alpha 1 6 cylinder. After dewinterizing, boat in water, no water getting thru to engine. Friend winterized for us and said all we need to do is put in water and fire u… read more
ROCKET
ROCKET
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Alpha one gen. 2 outdrive (1992) Was working, but was slipping
Alpha one gen. 2 outdrive (1992) Was working, but was slipping at top 1/3 of throttle. I thought it was a fuel problem to I was listening while we cruised at upper speeds. Turns out the problem was in… read more
Yachtwork
Yachtwork
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Technical or Trade School
2,271 satisfied customers
I had to replace the water pump in the lower unit of my 1986
I had to replace the water pump in the lower unit of my 1986 Mercruiser Alpha one motor. I have two questions. The impeller (fanned rubber wheel) was all busted up. The new one which came with my repa… read more
Larry B.
Larry B.
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High School or GED
574 satisfied customers
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

3,332 satisfied customers

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

Dominick

Dominick

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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

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22,804 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

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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

Noel Schembri

Noel Schembri

Marine Mechanic

2,759 satisfied customers

Advanced technical diploma

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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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