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I have a Merc opti 150 2007. I ran thru some silt last fall
I have a Merc opti(###) ###-#### I ran thru some silt last fall and the motor quit peeing and the alarm went off. The gauges were not reading any pressure. I took the boat home, changed the water pump… read more
Jason
Jason
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Vocational, Technical or Trade Scho
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I have a 2014 Mercruiser 5.7 fresh water cooled. It
I have a 2014 Mercruiser 5.7 fresh water cooled. It overheated yesterday. I put a gallon of coolant in tonight and ran it. It stayed at 160-170 at dock idling for 15 minutes. I took it for a ride and … read more
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Jason
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Vocational, Technical or Trade Scho
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I have an older 3208 NA 210 HP caterpillar in my commercial
I have an older 3208 NA 210 HP caterpillar in my commercial work boat. This week it starting losing high rpm power and was blowing black smoke out of the port side. We had an old Kenworth a long time … read more
K. Kergan
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Engine SN: OW673430, mercruiser 5.0 MPI, drive serial num OW927662.
engine SN: OW673430, mercruiser 5.0 MPI, drive serial num OW927662. use boat in saltwater, engine is open cooled system using seawater for cooling. Temp are running between 185 and 205 on gauge on boa… read more
Tan
Tan
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I have a Taswell 49 sailboat. A few months ago I had the engine
I have a Taswell 49 sailboat. A few months ago I had the engine shaft re-alligned and a new stuffing box installed. Now it overheats up to 135 degrees F at normal cruising speed. It overheats now matt… read more
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Overheat problem mercruiser mpi 5.0 2005 smartcraft, searay
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James
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I have repowered my 1999 regal 2760 with two new 4.3LT MPI
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James
James
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Hi, I have a 94 seaswirl 220swl with a carb ford 5.0. originally
Hi, I have a 94 seaswirl 220swl with a carb ford 5.0. originally the boat had a volvo sx drive with a 1.66 ratio running a 15 x 17 prop spinning the engine at between 4500-4700 depending on temp and h… read more
Jason
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i have a mercruiser 496 mpi 8.1 closed coolant sysem manifold
i have a mercruiser 496 mpi 8.1 closed coolant sysem manifold sensors throw an alarm at about 175 degrees. The engine temp with a temp gun is 165, the manifold are the same and the risers get up to 20… read more
James
James
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Vocational, Technical or Trade Scho
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just bought a boat, took it out for a test drive and idle speed
just bought a boat, took it out for a test drive and idle speed was fine but when i went to accelerate the motor would increase rpm but the boat speed was barely noticeable and when it got to around 5… read more
James
James
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Vocational, Technical or Trade Scho
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Hi I have a cat 3208 Marine engine in my pleasure boat. I
Hi I have a cat 3208 Marine engine in my pleasure boat. I believe it is approx 15 years old and was totally reconditioned approx 10years ago. Since then has only done 520 hours. At 2200 -2300 revs it … read more
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James
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I HAVE A 1985 CHRIS CRAFT FRESH WATER COOLED MERCRUISER 230
I HAVE A 1985 CHRIS CRAFT FRESH WATER COOLED MERCRUISER 230 THAT GOES UP TO 190 DEGREES AT HIGH SPEEDS 2500 RPM OR HIGHER WHERE SHOULD I START LOOKING FOR THE CAUSE I KNOW IT SHULD BE RUNNING AT 160 D… read more
Tan
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Can a motor slip at high RPM level when it is engaged/with
Can a motor "slip" at high RPM level when it is engaged/with a load on it? *I have two recently rebuilt MERCRUISER big block engines *I took out my boat, a 1987 35 foot SeaRay this afternoon *At 3200 … read more
shane j forrest
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I am looking at buying a 47 Mainship that has two 3208 Cummings.
I am looking at buying a 47' Mainship that has two 3208 Cummings. I want to take this boat on an extended boat trip (1 year) down the Intercoastal waterway. I will need to run this boat at low RPM's l… read more
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Where is the thermostat on a cat 3208 marine engine It is
Where is the thermostat on a cat 3208 marine engine? It is a 1979 210hp in a 28ft uniflite.… read more
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Low RPM Issue I have a 1984 OMC 2.5 liter Seadrive. When
Low RPM Issue I have a 1984 OMC 2.5 liter Seadrive. When I throttle forward the engine accelerates correctly for a couple of seconds and then drops back to about 2500 RPM. It will not sustaian any hig… read more
davesoutboard
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I have a mastercraft prostar 2000. The ingation is LTR Northstar
I have a mastercraft prostar 2000. The ingation is LTR Northstar 330 h/p. When driving the boat at 2500 rpm's the boat will misfire and slow down. The check engine light will come on the dash. If I sh… read more
Captain Dave
Captain Dave
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I was running my 1990 Searay with outboard 115HP Mercury (4 ...
I was running my 1990 Searay with outboard 115HP Mercury (4 cylinder with 2 cylinders shutdown at lower RPM)full trottle and when I was tring to reduce speed to lower my trottle handle couldn''t go be… read more
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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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