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2007 Carver Mariner help!
- JPS
- Scurvy Dog
- Posts: 1
- Joined: October 1st, 2022, 11:59 am
- Vessel Info: 2008 Carver Mariner 36 w/ 5.7 MPI Crusader engines
- Location: Seattle
- Has thanked: 2 times
2007 Carver Mariner help!
The problem is that after about an hour of moderate load on the engines, during which time they idle well and both appear to be running well, but then out of nowhere both will begin to surge and after a few minutes of this, they will cut out all together.
Then I rest them for an hour and they will start up and give me another hour of seeming to work fine, then surge and cut out.
I’ve replaced all spark plugs, distributors and rotors, it just had a new oil and impeller change and the fuel injectors have been inspected and are clean. Most of the batteries are in good shape, 2-3 years old.
Can low power on the house batteries cause this? It’s my understanding that the house batteries and both engine batteries are charged off the same battery charger. I did let them get down to 60% as indicated by VictronConnect battery monitor. At that level I noticed the Ray Marine’s backlight wouldn’t light up much, but when I powered on the GenSet, it came back bright.
Anyone have any ideas?
- km1125
- Admiral
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Re: 2007 Carver Mariner help!
I would suspect a fuel issue. You didn't mention fuel filters at all. Have they been checked/replaced? Did you get ALL of them? Sometimes there's a 'low pressure' and separate 'high pressure' filter on the engine, even past your primary water separating fuel filters.
How about the fuel tank vents? Do you know they're both clear? Have you tried running without the fuel caps in place (but being careful not to get water in there)?
How about the anti-siphon valves? Have they been removed and inspected (or replaced)?
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- CYO Supporter
- Posts: 5799
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
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Re: 2007 Carver Mariner help!
A good diagnostic tool is to hook up a portable tank but don't go there yet until you check the other items and post the results.
- bud37
- Admiral
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- Joined: April 23rd, 2015, 10:22 pm
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Re: 2007 Carver Mariner help!
JPS wrote:Source of the post The problem is that after about an hour of moderate load on the engines, during which time they idle well and both appear to be running well, but then out of nowhere both will begin to surge and after a few minutes of this, they will cut out all together.
Welcome to the forum..........That sure has all the appearance of fuel starvation......check all the things mentioned above, also clean all your cable connections and grounds.
Question......Is this boat new to you and does this happen to both engines at the same time with each fed from separate tanks ?????.......
- KyleR
- CYO Supporter
- Posts: 197
- Joined: July 8th, 2022, 10:50 am
- Vessel Info: MV Verity
2002 Carver 396
Twin Cummins 6BTA 370HP - Location: On the move!
- Has thanked: 79 times
- Been thanked: 52 times
Re: 2007 Carver Mariner help!
As it turned out for us, it was a cooling water issue. The external hull strainer had been painted over repeatedly and as was restricting most of the cooling flow. So the engine would basically run until it overheated, then shutdown on the overheat signal. It took quite a lot of trial and error to figure that out - but now that it has good flow it runs like a top!
Clogged strainers/heat exchangers/etc. would be something else to look at. If it is happening to both engines simultaneously, I would definitely be suspect of the fuel as others have said (unless there is a common seawater intake suction).
Just something else to consider!
2002 Carver 396
Twin Cummins 6BTA 370HP
- Delorean6855
- Scurvy Dog
- Posts: 24
- Joined: November 22nd, 2020, 10:54 am
- Vessel Info: 2004 Mariner Three Sixty, Crusader 6.0s w/225 hours, Koehler 7_3e genset
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Re: 2007 Carver Mariner help!
- Cooler
- Admiral
- Posts: 1547
- Joined: May 22nd, 2018, 12:09 pm
- Vessel Info: 1995 Carver 330 Mariner
Twin 350XL Crusaders
Home port: Menominee, MI - Location: Green Bay, WI
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Re: 2007 Carver Mariner help!
( All weather people have to say this on air, near lakes )
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