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New boat owner, first time running on muffs after the
New boat owner, first time running on muffs after the winterizing last fall. No flow of water out of the gimbal housing after 1-2 minutes running, so I shut if off - is this because the thermostat has… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,807 satisfied customers
Developed a load squeal coming from my 2002 4.3L Mercruiser
Developed a load squeal coming from my 2002 4.3L Mercruiser coupled to an Alpha One outdrive. Sounds just like a noisy fan belt. Removed the serpentine belt eliminating the belt/alternator/idler tensi… read more
Ted G.
Ted G.
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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
11,264 satisfied customers
I am winterizing a Mercruiser 4.3L TKS 190hp engine. I pulled
I am winterizing a Mercruiser 4.3L TKS 190hp engine. I pulled the block and exhaust manifold drain plugs to drain the water the other night, because I wanted to prevent any possibility of the block fr… read more
Charles
Charles
Certified Mercury Tech
5,156 satisfied customers
I have a 1974 Tri Sonic 1900 Tornado SST Tri Hull The lower
I have a 1974 Tri Sonic 1900 Tornado SST Tri Hull The lower unit is a Mercruiser 888-MC-1 Yesterday I put the muffs on it and started the motor. I noticed a little bit of blue gear oil come out the ex… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a 06 mercruiser/alpha with a closed cooled system went
I have a 06 mercruiser/alpha with a closed cooled system went to run it after 2 weeks and it overheated no water to the heat exchanger the pump on the sterndrive is working the impeller on the engine … read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
Mercury Mercruiser: Im stumped I have a 350 mercruiser carb
I'm stumped I have a 350 mercruiser carb engine in a Cruiser Overheating.ive changed impeller took thermostat out. Still temp rises when I'm Running 3500 rpms or more. Has brand new circ pump,water go… read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 satisfied customers
Hi there I have a 5,0 Mercruiser MPI with a alpha one drive
Hi there I have a 5,0 Mercruiser MPI with a alpha one drive with seawaterpump in it. I would like to modify the seawater system and install an engine mounted drivebelt driven seawaterpump. Can I use t… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,807 satisfied customers
I have a Mercruiser MCM 7.4 litre Bravo that I replaced the
I have a Mercruiser MCM 7.4 litre Bravo that I replaced the heads and manifolds on last fall. Now the engine runs perfectly, however begins overheating at 2000 RPM and higher. I have replaced the seaw… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
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1992 4.3 mercruiser Alpha Drive. With muffs and a waterhose
1992 4.3 mercruiser Alpha Drive. With muffs and a waterhose connected, no water is circulating. I pulled the thermostat and no water evident at all. Is a faulty seawater pump the blame? The temp gauge… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a 140Hp mercruiser that when I put the muffs on to start
I have a 140Hp mercruiser that when I put the muffs on to start in the driveway I get no water coming out of the prop and it appears that no water is getting to the engine period. What might be causin… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
Hello, This may be a stupid question but I have to ask. We
Hello, This may be a stupid question but I have to ask. We bought a 1987 Searay with a 4 cylinder mercruise engine. The Rep from the dealership said it had been winterized and the water drained from t… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
This is a basic question...and comment. Where do I find a
This is a basic question...and comment. Where do I find a basic diagram of a Mercruiser Alpha One, Gen II Sterndrive, showing which parts are which? My problem is when I set up for a test start of my … read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
after turning off engine theres an oily substance that starts
after turning off engine theres an oily substance that starts to show on top of the water at the back of the boat and i have to keep filling my outdrive oil, its a mercruiser alpha 1 outdrive… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
what is the dry weight of my 1991 searay 250 sundancer with
what is the dry weight of my 1991 searay 250 sundancer with twin mercruiser 4.3 v6's and alpha 1 outdrives?… read more
John White
John White
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Vocational, Technical or Trade Scho
306 satisfied customers
when running my 120 mercruiser inboard with muffs how much
when running my 120 mercruiser inboard with muffs how much water should come out of the exhaust bellows in the rear of the boat and what temp should my motor run?… read more
Master Tech
Master Tech
Service Manager/Technician
Vocational, Technical or Trade Scho
1,167 satisfied customers
I have a 1990 Sea Ray with a 5.0 Alpha One Mercruiser as the
I have a 1990 Sea Ray with a 5.0 Alpha One Mercruiser as the power plant. What direction does the prop shaft turn? My next problem is very perplexing. When I run the engine in the back yard, or course… read more
Alaska Rick
Alaska Rick
Retired Diesel & Automotive Mechanic
High School or GED
14 satisfied customers
HOW MANY GALLONS OF ANTI-FREEZE TO WINTERIZA A MERC CRUISER
HOW MANY GALLONS OF ANTI-FREEZE TO WINTERIZA A MERC CRUISER 4.3L WITH EITHER ALPHA 1 OR ALPHA 2 DRIVE,( NOT SURE WHICH). THE BOAT IS A 1990 SEA RAY 280.… read more
Larry B.
Larry B.
Marine Service Tech
High School or GED
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Meet the Experts:

Dominick

Dominick

Marine Mechanic

1,009 satisfied customers

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

Ted G.

Ted G.

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

John White

John White

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Jason

Jason

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Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

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Jeff G.

Jeff G.

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4,729 satisfied customers

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Captain Dave

Captain Dave

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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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