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09 February 2014, 08:33
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#1
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Member
Country: South Africa
Town: Durban
Boat name: Kemney
Make: Coastcat
Length: 5m +
Engine: Mercury mariner 60hp
Join Date: Feb 2014
Posts: 3
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Engine cuts out after a few minutes
Hi, need some help I got motor mariner 60hp year 1998, out at sea a few days ago and the motor was fine for a few hours then just cut out, I tried starting and nothing would happen after about 10 mins I tried again and it fired up went for a few minutes then cut again. It seems to do this over and over now even in idle seems as though as it gets warm it cuts. I have checked fuel and fuel line but all seems fine. Some advice would be good. Thanks
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09 February 2014, 09:10
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#2
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Member
Country: UK - Isle of Man
Town: Peel, IOM
Length: no boat
Join Date: Nov 2000
Posts: 2,511
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Could be your engine is salted up.
Sea water creates salt when not flushed through with fresh water after each use.
Maybe his happened before you acquired the boat?
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Brian
"Ribbing-the most expensive way of travelling third class"
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09 February 2014, 09:16
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#3
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Member
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 70hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 4,658
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Is this a 2-stroke or 4-stroke?
Do you have an inline fuel/water filter fitted? Check the fuel primer bulb for any signs of deterioration. There's also the fuel reservoir mesh filter on the engine - remove and clean. Lastly the fuel pump itself, the diaphragm can fail, but symptoms would be at WOT as it struggles to maintain flow.
Check the sparks first before doing anything, especially when it cuts out. Are they wet, fouled?
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Is that with or without VAT?
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09 February 2014, 09:27
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#4
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,182
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When the engine dies, does the primer bulb go soft/flat or is it still firm & full?
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Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: Don't feed the troll
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09 February 2014, 09:27
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#5
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Member
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
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Fuel tank vent?
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09 February 2014, 10:45
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#6
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Member
Country: UK - England
Town: Bristol
Make: Ribcraft
Length: 5m +
Engine: Yamaha
Join Date: May 2006
Posts: 4,299
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keep pumping the fuel bulb when start to falter, could be ya fuel pump
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09 February 2014, 13:06
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#7
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Member
Country: UK - England
Town: Leeds
Make: Valiant 450
Length: 4m +
Engine: Yamaha 55HP
Join Date: Jan 2013
Posts: 448
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If you are going along at speed and the engine gradually loses power and stops, it will be a fuel problem. If it is sudden, it is likely to be ignition.
A possibility is overheating and the engine shuts down to protect the engine, how strong is the tell tale??
A large bit of muck In the fuel tank can be sucked onto the pipe in the tank and then fall back to the bottom. Do you use a filter funnel? I have seen leaves come out of a petrol pump in the past.
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09 February 2014, 13:41
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#8
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Member
Country: UK - England
Town: bicester
Length: no boat
Engine: outboard only
Join Date: Feb 2009
Posts: 913
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have you tried to keep some pressure on the primer bulb if it goes ok I would fit a fuel pump kit, when it stops are you in a safe position that you can check the colour of the spark plugs ,and are the thhe same colour?Has it been sneezing lately if so check the pulse hose and connections to make sure there are no holes been blown thru them.
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15 February 2014, 09:59
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#9
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Member
Country: South Africa
Town: Durban
Boat name: Kemney
Make: Coastcat
Length: 5m +
Engine: Mercury mariner 60hp
Join Date: Feb 2014
Posts: 3
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Cdi unit
Hi, changed the cdi and the problem has gone, this is the secondd cdi in two months but with different problems, does anyone have an idea what could be causing the cdi to go bad
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15 February 2014, 10:47
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#10
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,069
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Quote:
Originally Posted by warrenzn
Hi, changed the cdi and the problem has gone, this is the secondd cdi in two months but with different problems, does anyone have an idea what could be causing the cdi to go bad
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Are you sure your stator is ok?That's the only thing that could damage the CDI.
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15 February 2014, 12:25
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#11
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Member
Country: South Africa
Town: Durban
Boat name: Kemney
Make: Coastcat
Length: 5m +
Engine: Mercury mariner 60hp
Join Date: Feb 2014
Posts: 3
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Quote:
Originally Posted by Nos4r2
Are you sure your stator is ok?That's the only thing that could damage the CDI.
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How do I test the stator
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15 February 2014, 12:55
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#12
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Member
Country: UK - England
Town: Leeds
Make: Valiant 450
Length: 4m +
Engine: Yamaha 55HP
Join Date: Jan 2013
Posts: 448
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Most engine manuals will give the electrical resistance tests in ohms. You can test the wiring in sequence with an ohms meter. However as it takes 10 mins for the problem to appear, the stator may look ok when testing and the mistake would be to look for something else as the cause. At this point most people give up ( I've tested everything and I still can't find it syndrome). The only way to really know is to use a good second hand one from a running engine or pay the piper and get a new one.
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