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Can i switch from a 6 port thermostat housing to 4?
can i switch from a 6 port thermostat housing to 4? Mercruiser 5.7 with alpha one … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
1990 Mercruiser 5.7 Litre, operating in salt water. Port
1990 Mercruiser 5.7 Litre, operating in salt water. Port exhaust elbow much hotter than starboard. I have thermostat housing with 6 tubes (raw water in; to water pump; 2 to exhaust manifolds; and 2 to… read more
Noel Schembri
Noel Schembri
Marine Mechanic
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hi i have a 4.3 v6 mercruiser and the risers are getting hot.
hi i have a 4.3 v6 mercruiser and the risers are getting hot. The manifolds and risers have been replaced in the last 12 months. i have checked the water flow from the leg to the engine and all is ok … read more
Jason
Jason
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Vocational, Technical or Trade School
22,804 satisfied customers
working on a mercrusier 350 5.7, alpha one gen 2 thats runnig
working on a mercrusier 350 5.7, alpha one gen 2 that's runnig hot enough to set off the warning buzzer 200 degrees. changed raw waterpump in lower unit and new engine circulating pump. changed transo… read more
Ted G.
Ted G.
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Vocational, Technical or Trade Scho
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Hello, I have a 4.3 litre V6 MPI mercruiser with Alpha outdrive.
Hello, I have a 4.3 litre V6 MPI mercruiser with Alpha outdrive. Have problems with marine groth in the seawater inlet system through the outdrive and therefore want to convert to direct seawater inle… read more
Noel Schembri
Noel Schembri
Marine Mechanic
Diploma
2,759 satisfied customers
I have a mercruiser 260 350 chev engine .The starboard side
I have a mercruiser 260 350 chev engine .The starboard side of the engine is getting hot.Question is where does the thermostat go in the housing top or bottom seems to look like it could go either way… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
I am installing an auxiliary heater in my 1988 Searay 30D
I am installing an auxiliary heater in my 1988 Searay 30D with 5.7 Mercruiser inboards with shaft drives. It states in the manual to only connect auxiliary heaters by connecting the heater hose to the… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I just bought a houseboat with twin 2003 5.0 MPI Mercruisers
I just bought a houseboat with twin 2003 5.0 MPI Mercruisers and started winterizing. I have always had 5.7's on my cruiser and winterized by draining the plugs and flushing AF with muffs. With the ho… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 1986 Bayliner Ciera with a 5.7 Liter GM V8 Engine.
I have a 1986 Bayliner Ciera with a 5.7 Liter GM V8 Engine. This is a Volvo Penta AQ290A. The center port of the intake (induction) manifold gets very hot on both sides. Does the center port of the ma… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
I have an 1991 BAJA 29 footer w/ 2 350cid Chevy engines. Took
I have an 1991 BAJA 29 footer w/ 2 350cid Chevy engines. Took the boat out and w/ in 10 minutes one engine locked down. Took the engine out and rebuilt it. Went back in the ocean and ran for another @… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
5.7L raw water cooled. Starboard side riser running too hot
5.7L raw water cooled. Starboard side riser running too hot to touch. Changed the riser with a new one, no difference. Still running hot on the one side.… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 1998 Trophy 23 foot sport fishing boat by Bayliner.It
I have a 1998 Trophy 23 foot sport fishing boat by Bayliner.It has a Mercruiser Alfha one outdrive with the Chevy 5 liter engine with a two barrel carb.The boat has 260 total hours.The boat stays in t… read more
Noel Schembri
Noel Schembri
Marine Mechanic
Diploma
2,759 satisfied customers
I have a 1987 30 SeaRay with a 5.7L Mercury with an Alpha
I have a 1987 30' SeaRay with a 5.7L Mercury with an Alpha 1 drive. the engine recently over heated and burn the rubbers off the exhaust at the Y pipe on the right exhaust mainfold. Suspected seawater… read more
Whitecap36
Whitecap36
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Vocational, Technical or Trade Scho
1,557 satisfied customers
converted my v8 mercruiser log stye manifold system to the
converted my v8 mercruiser log stye manifold system to the Center rise model...The problem is that one side of the exhaust runs warm and the other side runs hot ? The temp guage on dash is normal...Wh… read more
Kenny
Kenny
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Master's Degree
99 satisfied customers
I have a 1970 slverline 4 cylinder inboard mercruiser sterndrive.
I have a 1970 slverline 4 cylinder inboard mercruiser sterndrive. Engine serial #(NNN) NNN-NNNN Can you tell me the horsepower of the engine and which outdrive i have. Pre alpha, alpha, ect Thank you… read more
Kenny
Kenny
Mercury & Mercruiser Diagnostics
Master's Degree
99 satisfied customers
I have an 1989 17 vip boat. It has a 2.3l engine with an omc
I have an 1989 17' vip boat. It has a 2.3l engine with an omc outdrive. I know there is a conversion to make it a mercrcruiser outdrive. What I need to know is which particular outdrive and conversion… read more
Dominick
Dominick
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Vocational, Technical or Trade Scho
1,009 satisfied customers
1984 235 HP 5.0 over heats, stbd side flows better than port,
1984 235 HP 5.0 over heats, stbd side flows better than port, risers and manifold are clear what gives?… read more
briggs archer
briggs archer
master marine mechanic
Associate Degree
403 satisfied customers
Just installed a partially dressed remanufacturered 260HP 350
Just installed a partially dressed remanufacturered 260HP 350 Chevy long block (5.7 Mercruiser). Have a Alpha 1 Gen II OD. We replaced starter, 140*thermostat and housing, GLM manifolds and risers, OD… read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
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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

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

22,804 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,507 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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