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I have dual V8 engines. One engine temperature gauge read
I have dual V8 engines. One engine temperature gauge read hot. At idle, it stays in green (middle of the gauge), on a sea trial at speed it eventually goes into the red. The port side riser runs hotte… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
My mercruiser engine raw water cooled the port riser very
hi my mercruiser engine raw water cooled the port riser very hot to touch engine temp normal… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
Tan here is a follow up based on your suggestions... The
Tan here is a follow up based on your suggestions... The pressure test of the cooling system did not reveal any real issue. There was a slight drop in pressure of the port engine but very very close t… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
i have twin Mercruiser 305 ci (MIE228) in a 1978 Bertram 28
i have twin Mercruiser 305 ci (MIE228) in a 1978 Bertram 28 the port engine has been overheating with the temp gauge showing rapid increase at higher rpm, then dropping when rpms are reduced and engin… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 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
22,043 satisfied customers
I have a 1987 Mercruiser 5.7LSki 260Hp. I am not getting equal
I have a 1987 Mercruiser 5.7LSki 260Hp. I am not getting equal amounts of water out of the exhaust. Seems to be more on the even side of cylinders. The odd side has less. Just replaced the water pump … read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 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
22,043 satisfied customers
I have a 1999 Stingray with a 4.3 mercruiser sterndrive. I
I have a 1999 Stingray with a 4.3 mercruiser sterndrive. I started the engine for the first time the year ( on the trailer, with garden hose attached ). A lot lore water exited the exhaust ports on th… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
One of my engines is overheating at a slow rate. The raw water
One of my engines is overheating at a slow rate. The raw water cooled engine temperature normally sits at 175 degrees, but has been increasing slowing (over past 8 months) to 200 degrees at present. R… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I have a Rinker 232 with a mecruiser 5.0l alpha one engine
I have a Rinker 232 with a mecruiser 5.0l alpha one engine with steam coming from the exhaust. Cleaned both risers and replaced the thermostat but still have the same problem. Starboard riser is also … read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
2,685 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
HI my name is Joe i have a 1998 5.7 mercruiser alfa 1 generation
HI my name is XXXXX XXXXX have a 1998 5.7 mercruiser alfa 1 generation 2 with a heating problem. The starboard side of the motor gets extremely hot. The water temperature rises to 180 degress or highe… read more
Whitecap36
Whitecap36
Service Manager/Technician
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
Mercury & Mercruiser Diagnostics
Master's Degree
99 satisfied customers
My friend is buying a used 2001 searay with 28 hours on it
My friend is buying a used 2001 searay with 28 hours on it from a used boat dealer. The starboard riser is hot to the touch after about 3 to 5 seconds of leaving your hand on it. The port riser is coo… read more
mercmastertech
mercmastertech
Service Manager, Master technician
Technical School
249 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
I have a 5.0l Mercruiser. A few minutes after starting the
I have a 5.0l Mercruiser. A few minutes after starting the engine, the water from the thermostat housing to the engine water circulating pump, and the starboard manifold becomes very hot, the water to… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 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
402 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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