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Recently had manifold and risers opened and checked.
Recently had manifold and risers opened and checked. Replaced with new gaskets. At that point the engine starting overheating at idle, 225+ add a little throttle 1000rpm, it would cool off below 160. … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
After an impeller failure/replacement on my 1995 454 bravo
After an impeller failure/replacement on my 1995 454 bravo 3, … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
JA: . What is your issue regarding? Customer: I have a 1960
I have a 1960 Merc 400 short shaft 45 hp. I was about to replace the impeller and notice gearbox oil in the impeller housing and also in the cooling tube going to the power head. I had noticed the gearbox contained only water at the end of the season. So I need to replace the shaft seal, or the entire water pump housing. How do I do this? Thanks. … read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
4,730 satisfied customers
Recently ran into heavy gravel Boston softball size rocks
Recently ran into heavy gravel Boston softball size rocks churned around about 3 mins before backing out. Where is best access point in cooling system to determine sand gravel intrusion? Props will de… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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My wife forgot to turn our 115 merc off when coming out, shut
My wife forgot to turn our 115 merc off when coming out, shut it off top of ramp probably ran for 5 mins out of water, should we be ok or do we need to have checked out?… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I have a 23.6 eliminator with a 1997 mercursier 502 mpi, bravo
I have a 23'.6 eliminator with a 1997 mercursier 502 mpi, bravo 1 drive. new manifolds, salt water cooled. now steam is coming though the through hull exhaust and over heats at high rmp to where the a… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
2,719 satisfied customers
I need to replace the impellar on my seawater system for my
I need to replace the impellar on my seawater system for my 5.0 Ltr mercury Is there any diagrams showing how? How do you take off serpentine belt?… read more
Noel Schembri
Noel Schembri
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hi i have 2006 mercury 50 hp outboard last time i got stock
hi i have 2006 mercury 50 hp outboard last time i got stock in bunch of grass and dirt spot so it still runs fine but the sprinkler spot on the back of the motor winch piss water out, doesn't work no … read more
Noel Schembri
Noel Schembri
Marine mechanic
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2,719 satisfied customers
I have a 2002 8.1 Gi in my Cobalt 246. On the water yesterday
I have a 2002 8.1 Gi in my Cobalt 246. On the water yesterday it went into limp home mode as it was getting too hot. I pulled the impeller at it had no blades. My concern is how do I remove the blade … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a 1973(?) 40HP 402 merc (ser#3406864) need to replace
I have a 1973(?) 40HP 402 merc (ser#3406864) need to replace the water pump impeller, little confused on how to release the drive shifter.… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
4,730 satisfied customers
We have an 8HP 4 stroke Yamaha outboard engine. There is no
We have an 8HP 4 stroke Yamaha outboard engine. There is no water coming out of the nipple from the cooling system at the underside of the engine . Have checked for seaweed plugging this nipple and at… read more
James
James
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Vocational, Technical or Trade Scho
4,094 satisfied customers
I bought a used boat with a 350mag mpi with 65 hrs on it. the
I bought a used boat with a 350mag mpi with 65 hrs on it. the boat 2003 model and took it to the lake for the first time. started fine but within 5 minutes the motor got so hot it started melting the … read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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Ford Mustang Boss 302 was running my ford 302 inboard engine
was running my ford 302 inboard engine the other day with hose water hook up ears...and noticed it ran kind of hot ..almost tea temp water comming out...seemed to be spitting water out exhaust dischar… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
Trying to find out where the impeller is located in a 2006
Trying to find out where the impeller is located in a 2006 Sea Ray 185, 3.4 v-6 Mercruiser engine with a 4.3 Alpha out-drive. 1.7R...Is it on the engine or in the out-drive?… read more
Jeremy R.
Jeremy R.
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I have a merc 150 2004 with only 50 hrs on it. model# 1-150462c.
I have a merc(NNN) NNN-NNNNwith only 50 hrs on it. model# XXXXX It seems to overheat. I had a service by auth merc dealer done in nov 2008 because of its lack of use. Replaced water pump and checked p… read more
Whitecap36
Whitecap36
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Vocational, Technical or Trade Scho
1,557 satisfied customers
I HAVE A 4.3L 2004 MERCRUISER. ENGINE IS OVERHEATING. HOW
I HAVE A 4.3L 2004 MERCRUISER. ENGINE IS OVERHEATING. HOW DOES ONE CHECK THEROMSTAT OR IMPELLER. RUNS GOOD, HAS NOT BEEN RUN MUCH IN LAST YEAR. TOOK OUT FOR SPIN, HEATED UP TO ALARM WHEN GOING FULL SP… read more
Infiniti Nissan Specialist
Infiniti Nissan Specialist
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How do I get the water flow through my Yamaha 60 1995 outboard motor after winter rest
My 1995 Yamaha sat all winter. The water does not flow when I start the motor so it must be plugged up. How do I fix this myself? thanks.… read more
Dominick
Dominick
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Vocational, Technical or Trade Scho
1,009 satisfied customers
i just purchased a merc 7.5 outboard that was rebuilt. the ...
i just purchased a merc 7.5 outboard that was rebuilt. the engine seems to run fine and i was told that the impeller was replaced because no water was coming out. the mechanic told me that this did no… 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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