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I hooked up a manual oil pressure gauge, 40+ psi at idle. I
Jason,, I hooked up a manual oil pressure gauge, 40+ psi at idle. I pulled the plugs to do a compression test as I had planned. The port side all 4 cylinders are 185 - 190. Th starboard side, cyl 1 is… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
318 Chrysler Marine engine, raw water cooled. Replaced thermostat
318 Chrysler Marine engine, raw water cooled. Replaced thermostat & sensor on leeward engine as it is running very cold. The temp gauge was tested and works fine. The manifold is cold. Engine continue… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
I just repowered my 28 bertram with two reman 5.7's these are
i just repowered my 28 bertram with two reman 5.7's these are the older block 010 gm's (pre vortec). i have new risers, manifolds, raw water pump, and all hoses are new. the boat is fresh water cooled… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
I have a mercruiser 4.3 raw cooled. Running on muffs the exhaust
I have a mercruiser 4.3 raw cooled. Running on muffs the exhaust water is v hot but temp gauge ok. The pipes from balls on top of thermostat housing are cold does this sound right? Thanks… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
Tan My starboard engine runs about 20 degrees hotter than
Tan My starboard engine runs about 20 degrees hotter than port. At item the discrepancy is not noticeable but as Rpms increase it plays itself out… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
Hi Tom. I own a 2000 mercrusier 454 serial number 0l621200.
Hi Tom. I own a 2000 mercrusier 454 serial number 0l621200. I have been experiencing these problems over the past two seasons. The starboard side of my single engine is running 30 deg hotter then port… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
hi i bought a 83 bertram with sea max 351s 1999 models electronic
hi i bought a 83 bertram with sea max 351s 1999 models electronic ignition it had sat around a few years it ran but not good smoked,you could smell fumes ive spent thousands on so called mechanics all… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
I have a 1979 Bertram 28 Flybridge Cruiser with original twin
I have a 1979 Bertram 28' Flybridge Cruiser with original twin Mercruiser/Chevy Model 350(228 hp) straight shaft eight cylinder engines. Please answer the following questions: 1. I seem to have old se… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I have a 2001 Bertram 390 with twin TAMD74EDC. Had boat for
I have a 2001 Bertram 390 with twin TAMD74EDC. Had boat for four years with no motor problems. Yesterday I took the boat out and starboard overheated under light load. Replaced raw water impeller and … read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 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
FAO Tan Partin Hi Tan, you where correct, tubes gone in the
FAO Tan Partin Hi Tan, you where correct, tubes gone in the Heat Exchanger but it is beyond repair. I have tried to purchase a replacement but am told it is no longer available which is a major proble… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
Hello, I have a 1983 Bertram 28 Sport Fisherman with twin
Hello, I have a 1983 Bertram 28' Sport Fisherman with twin 230 hp merc IB with a closed cooling system. My starboard eng.started to run hot, about 170' and blowing white smoke out the exhaust port, th… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
Volvo recommends these engines be run at 2600 rpm. When I
Volvo recommends these engines be run at 2600 rpm. When I do that the starboard eng temp climbs to 215 (port stays at 185) I have checked the intake and strainer and replaced the impeller. Whats next … read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
I have twin Mercruiser 8.1 inboards on a Sea Ray 340 sundancer
I have twin Mercruiser 8.1 inboards on a Sea Ray 340 sundancer and experience the following problems in my starboard engine: - Engine would not go above 3800RPM - LOW PSI - varies from 0 to 9 PSI - Ov… 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
I have a 2005 Rinker 320 wit twin 5.0 s. The port engine runs
I have a 2005 Rinker 320 wit twin 5.0 's. The port engine runs 10 - 15 degrees hotter(195-195) than the starboard engine (175) when warmed up and under way. The port risers are hotter to touch than th… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
a new Mercruiser 260hp EFI engine.in a 2000 230 Bowrider SEARAY
a new Mercruiser 260hp EFI engine.in a 2000 230 Bowrider SEARAY I have the starboard side of the exhaust manifold much hotter than the port side while running the motor. I can put my hand on the port … read more
Dr Hamman
Dr Hamman
Vocational, Technical or Trade Scho
57 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
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Meet the Experts:

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Ted G.

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Jason

Jason

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Tan

Tan

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Jeff G.

Jeff G.

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Captain Dave

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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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