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350 magnum EFI/MP Bravo One 5.7 1995 S/N OF598119.
Overheating under load, at 3000 rpm, replace sea pump new due to it was leaking by pulley, no change, also check water flow (sea) to the sea pump, check good, also run engine and disconnected hose to the exhaust manifold good water flow, ran up to 3000 in neutral good flow , then i replaced circulating pump since original from 1995! no change still over heats last I replaced thermo stat and again no change! I run in neutral as high as 3000 + no problem, only when in gear under load. Could a head gasket do this? also, the moment you reduce power in gear you can see temp drop down old boat old engine I hate giving up like to know if it is time!!! … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have an 8.1 volvo penta. When I get above 3000rpms an
I have an 8.1 volvo penta . When I get above 3000rpms an alarm goes off and speed is reduced .Oil and temp are fine . what can cause this ? … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I recently replaced my impeller and thermostat in my
Hi I recently replaced my impeller and thermostat in my mercruiser 502. Boat has been running great and between 165-175 water temps, then the other day it spiked up to about 190 within a minute of tak… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
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 Scho
17,310 satisfied customers
4.3 mercrusier new engine installed bought the boat it over
4.3 mercrusier new engine installed bought the boat it over heats at idle only so I replaced lower water pump same thing pulled upper water pump replaced it same thing thermostat was replaced same thi… read more
Tan
Tan
MerCruiser Certified Technician
11,490 satisfied customers
I have a 2006 Crownline 202 with a volvo pent 5.0. It has
I have a 2006 Crownline 202 with a volvo pent 5.0. It has always performed well, but last season I had trouble with overheating. The temp gauge would get to about 196 degrees and the alarm would sound… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
2007 mercruiser 5.0 MPI, just replaced raw water impeller,
2007 mercruiser 5.0 MPI, just replaced raw water impeller, thermostat, oil, plugs, drive lube and engine runs smooth but using an IR gun thermometer I get 90F on top of riser, 180-185 on lower sides o… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
Jason, I have 1987 Bayliner with 454 engines. It runs well
Jason, I have 1987 Bayliner with 454 engines. It runs well at normal speeds and engine temperature seem fine on both engines. However, when you go at full throttle at 2800 rpm there is a white/gray sm… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a 05 Crownline with a Volvo Penta 5.7 GI. I have notice
I have a 05 Crownline with a Volvo Penta 5.7 GI. I have notice it to smoke a little out of the side exhaust (white smoke). Especially after coming off plane and into a no wake zone. Does not burn oil … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a 7.4 L , closed cooling, inboard. The motor was running
I have a 7.4 L , closed cooling, inboard. The motor was running around 160 to 180. Replaced the raw water pump but it did nothing. Old one was in good shape. Pulled out the thermostat, that got me hom… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a 2007 sea ray 230 select with a 350 mag and bravo three
I have a 2007 sea ray 230 select with a 350 mag and bravo three deive. The other day we took it out and I ran it WOT with the captains call on it ran hot after about 10 minutes. We shut it down to coo… read more
Tan
Tan
MerCruiser Certified Technician
11,490 satisfied customers
we have a 2,006 sea ray 320 with town 6.2 L 320 mpi with bravo
we have a 2,006 sea ray 320 with town 6.2 L 320 mpi with bravo III out drives. The manifolds where replaced in june 2,010, together with one engine because of water intrusion. Boat had 200 hrs. I boug… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
977 Chris Craft Lancer 23 powered with Marine Power 350 raw
977 Chris Craft Lancer 23 powered with Marine Power 350 raw water cooled engine. Having a problem with maintaining engine temp in proper range. Little water exiting through ehausts; exit water tempera… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
My son and I are checking to buy a 2001 Sea Ray-Sun Sport 280
My son and I are checking to buy a 2001 Sea Ray-Sun Sport 280 cruiser. It has two 350 HP, 7l4 litre merc engines with 135 hours. The boat was service by MarineMax a few months ago and one cylinder hea… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
my mewchanic replaced a bellows in the outdrive. Now I see
my mewchanic replaced a bellows in the outdrive. Now I see saltt water in the outdrive oil resevoire. Any suggestions to fix the problem ??… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a 28 ft Chris Craft with a single 305k engine and closed
I have a 28 ft Chris Craft with a single 305k engine and closed cooling. I have had recurring overheating problems at high speeds. In 2 instances changing the seawater impeller solved the problem, but… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have recently purchased a used 2004 Crownline 225BR sporting
I have recently purchased a used 2004 Crownline 225BR sporting a 5.7L GXI 350 Mag Volvo Penta and Volvo Penta Duo Prop outdrive. Only to find out later that it was once a salt water vessel. Before eve… read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
How do you determine what gaskets to use on a 5.0 MPI Merc.
How do you determine what riser gaskets to use on a 5.0 MPI Merc. serial #OM624908 with a standard water cooling system dry-joint with spacers between exhaust manifold, spacer, and riser? I've been to… read more
mercmastertech
mercmastertech
Service Manager, Master technician
Technical School
249 satisfied customers
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