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Prospective purchase. 5.7 mercruiser 350 mag mpi. risers at
Second Opinion] prospective purchase. 5.7 mercruiser 350 mag mpi. risers at 100 degrees, manifolds at 189 or so, both temps via handheld IR temp reader. Temp at guage at helm stays around 175. This wa… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,955 satisfied customers
I have forgotten where the brackets for the shift cables
I have forgotten where the brackets for the shift cables mount at on top of the mercruiser inbound/outboard engine. The engine is in a 1992 baja outlaw. The engine itself is a 454 Chevy. … read more
Ted G.
Ted G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,115 satisfied customers
My boat is a 1998 SeaRay 210SD with 5.0 L EFI. With a recent
My boat is a 1998 SeaRay 210SD with 5.0 L EFI. With a recent spark plug change and ESC change in the distributer it runs strong, After about 2-3 minutes at WOT , the temperature first drops then shoot… read more
Ted G.
Ted G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,115 satisfied customers
Over heating issue. changed impeller, was in complete pieces
over heating issue. changed impeller, was in complete pieces .back flushed from oil cooler to pump. changed thermostat. found clog in fitting beneath both starboard and port exhaust risers. flushed fr… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,955 satisfied customers
1997 mercruiser 7.4 low hours, fresh water use only, manifolds
1997 mercruiser 7.4 low hours, fresh water use only, manifolds too hot to touch! I replaced impeller,checked water flow with earmuffs,enginr temp is ok at 160 degrees. I pulled off starboard riser it … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,955 satisfied customers
98 5.7l mercruiser. Ive had over heating issues for the past
98' 5.7l mercruiser. I've had over heating issues for the past two years.1st had almost full blown fire. Shop replaced bellows, impellor,thermostat and more. The SS hose clamps were almost melted. Fir… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I replaced my raw water pump impeller and now i have water
I replaced my raw water pump impeller and now i have water leaking from the plugs in both the exhaust mainfold just before the riser. More water is coming out of the starboard side then the port side … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,955 satisfied customers
I have an older Sea Ray w/188 hp 888 (302) Mercruiser i/o,
I have an older Sea Ray w/188 hp 888 (302) Mercruiser i/o, started overheating the same day I lost my gears in LU. I have replaced the LU, new water pump, impeller, new BLOCK water pump. Getting low w… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,955 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
Have a 5.7L I/O with raw water pick-up pump ( replaced impellar
Have a 5.7L I/O with raw water pick-up pump ( replaced impellar ), installed new 160 degree thermostat. Engines starts fine, temp goes to 180 and stays there. Can cruise for hours below approx. 2500 r… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
Hi, I have an 88 27 ft Mirage with twin 7.4 lt 454 engines
Hi, I have an 88 27 ft Mirage with twin 7.4 lt 454 engines 330 hp per side bravo one mercruiser outdrives. Last year the port outdrive was toast. My mechanic replaced it with a rebuilt merc outdrive. … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 2007 5.0 Liter MPI Bravo Three sterndrive and the
I have a 2007 5.0 Liter MPI Bravo Three sterndrive and the mechanic said I needed a new impeller because the engine is overheating. What is it or what does that mean, please?… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
Have twin 2007 MPI 6.2 340 HP Bravo III Mercruiser I/Os. Started
Have twin 2007 MPI 6.2 340 HP Bravo III Mercruiser I/Os. Started to accelerate port engine RPMS reached 1500 droped back to 1000. Starboard engine RPMs climbed normally. Placed engines in neutral star… read more
shane j forrest
shane j forrest
Vocational, Technical or Trade Scho
270 satisfied customers
After a couple of hour run at least 3/4 throttle, my 1999 Mercruiser
After a couple of hour run at least 3/4 throttle, my 1999 Mercruiser 4.3 risers doesn't seem to be heating equally. The starboard riser seems it's normal hot to touch, while the port riser is barely w… read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 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
Vocational, Technical or Trade Scho
426 satisfied customers
I have a 5.7 fuel injected I believe about 270 HP factory installed
I have a 5.7 fuel injected I believe about 270 HP factory installed original in a 2000 WA250 Sportcraft engine is running about 190-200 degrees usually stays about 170 this has been a gradual increase… read more
Mechman45
Mechman45
Vocational, Technical or Trade School
152 satisfied customers
i have a 35 foot fountain offshore boat with built 502 efis,
i have a 35 foot fountain offshore boat with built 502 efis, I changed my outdrives from bravo 1 to bravo Xr out drives with dual water pickups, after doing so my water pressure would run up to 50# XX… read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 satisfied customers
Hi guys. I have a 2001 Baja 302 with 454 efis Never noticed
Hi guys. I have a 2001 Baja 302 with 454 efi's Never noticed before but both stb. exhaust risers are much hoter than port side when running. Boat has 75 hours on it and has always been fresh water flu… read more
Mechman45
Mechman45
Vocational, Technical or Trade School
152 satisfied customers
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Meet the Experts:

Ted G.

Ted G.

Marine Mechanic

4,115 satisfied customers

40 years experience, Safe boating instruct., 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

24,955 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

Noel Schembri

Noel Schembri

Marine Mechanic

3,038 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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