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Yamaha 150 hp 2 stroke 1999 model. new water pump, new
Yamaha 150 hp 2 stroke 1999 model . new water pump, new thermostats installed ran motor in water barrel to test pump lots of water flow and pressure (15lbs) all appears to be fine . Problem is it acts… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a 1996 Mercury 225 EFI Serial number 0G373727 i
I have a 1996 Mercury 225 EFI Serial number 0G373727 i replaced the thermostats with 143 degree stats and my motor still reaches about 170 in temp is this correct or should i be using 120 stats for th… read more
Jason
Jason
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Vocational, Technical or Trade School
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The overheat alarm goes off 30 seconds after engine is
The overheat alarm goes off 30 seconds after engine is started and idling.I have replaced the water pump and thermostats and it hasn't fixed it.The water comes out in a solid stream for a few seconds … read more
Charles
Charles
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I replaced the water pump last year because the water stream
I replaced the water pump last year because the water stream was weak and the motor ran a little on the warm side. After doing so everything seemed fine. Ran normal. But at higher RPM's it would run h… read more
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Jason
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2002 Mercury 150 hp 2 stroke keeps going into guardian mode.
2002 Mercury 150 hp 2 stroke keeps going into guardian mode. What are the typical problems associated with this? (my boss just bought a a boston whaler 180 ventura used) The former owner indicated tha… read more
Jeff G.
Jeff G.
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I have a 1998 115HP Evinrude and recently started getting overheat
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Noel Schembri
Noel Schembri
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We have a 1986 mercury xr2 black max 150, and its running hot,
We have a 1986 mercury xr2 black max 150, and its running hot, and we have changed water pumped in it and taken out thermostats and it still runs hot. the alarms continue to go off.… read more
Jeff G.
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Engine is pissin good but after a short while the overheat
Engine is pissin good but after a short while the overheat buzzer goes off not all the time but more often lately.is there a thermostat or something else i can check besides pulling the head and repla… read more
Tan
Tan
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I have a 1995 Mercury Black Max 175 hp outboard that is overheating
I have a 1995 Mercury Black Max 175 hp outboard that is overheating at lower speeds. When I go fast it cools. I replaced the water pump but the old one looked good. I checked the t-stats and they look… read more
Jeff G.
Jeff G.
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i have a mercury black max,. 2 stroke, oil injected outboard
i have a mercury black max,. 2 stroke, oil injected outboard 150 - 175 hp. when the boat is under load and travelling at top speed (approx 30 kots) the temerature guageshows engine runing cool then wh… read more
Tan
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Mercury 150 saltwater series efi, water temp control valve
Mercury 150 saltwater series efi, water temp control valve fails causing overcooling which efi responds to by richening mixture, causing fouling of plugs and poor fuel economy. Local merc agent has ha… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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Hello, I have a 2004 mercury 200 efi saltwater edition. I
Hello, I have a 2004 mercury 200 efi saltwater edition. I intermittently get water temperature sensor fault alarm, but after a shutoff and restart it went away. Now I get temps around 100 when running… read more
Tan
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My 2002 Mercury 150 Saltwater outboard does not pump water
My 2002 Mercury 150 Saltwater outboard does not pump water at headway speed. Increasing speed from 5 to 9 miles per hour starts the cooling process. I inspected the lower unit, the impeller is in new … read more
Jason
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jeff, here is the entire story. i have pr merc offshore 200. they
jeff, here is the entire story. i have pr merc offshore 200. they have always run "hot" in my opinion gauge says 140 at idle and 190 when running. i have installed new t stats, poppet, and water pump … read more
Jeff G.
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I just aquired a 235 evinrude it has cooling system issues.
I just aquired a 235 evinrude it has cooling system issues. the port head was running hot on bottom cyl. I removed the head and found a water restrictor in the engine block obstructing water flow were… read more
Master Tech
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I have a 1976 70 HP Eninrude motor. What temp thermostat should
I have a 1976 70 HP Eninrude motor. What temp thermostat should it have in it?? It has been replaced and now has a 143 in it but it runs REALLY REALLY hot. Thanks… read more
Master Tech
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I have a 1996 225HP EFI Mercury Outboard it runs warm sometimes
I have a 1996 225HP EFI Mercury Outboard it runs warm sometimes 150-170 degrees and sometimes runs normal it if I am not watching sometimes it will set the overheat alam off but if I throttle back to … read more
TOM
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I have a mercury 150 saltwater series and the temp guage from
I have a mercury 150 saltwater series and the temp guage from time to time will go up to about 205 degrees then come back down to 175-180 i checked the impeller and it looks new and pumps plenty of wa… read more
ROCKET
ROCKET
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Jason

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Tan

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Jeff G.

Jeff G.

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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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