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22 August 2011, 09:33
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#1
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Member
Country: UK - Scotland
Town: Dunoon
Boat name: Humber
Make: Humber
Length: 4m +
Engine: outboard petrol 40HP
Join Date: Aug 2011
Posts: 5
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Mariner 4 stroke 40HP intermittant fault
Engine shuts down into safety mode? for no apparent reason. Switch off and restart and all is fine! Had computer analysis done and no problems show. Any ideas?
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22 August 2011, 19:17
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#2
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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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is it the 40efi? any alarms sounding?
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22 August 2011, 19:43
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#3
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Member
Country: UK - England
Town: Cambs
Make: Scorpion
Length: 8m +
Engine: 225 Opti
Join Date: Sep 2010
Posts: 356
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Long shot this one based on recent experience. Ive got a 2002 60 efi which recently behaved similarly. Turned out to be a blown regulator/ rectifier which is a known fault on 40 50 and 60's. Ran, stopped, ran, stopped.
Telltale apart from not charging was scorch marks on the inside of the cowling
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22 August 2011, 23:32
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#4
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Member
Country: UK - Scotland
Town: Dunoon
Boat name: Humber
Make: Humber
Length: 4m +
Engine: outboard petrol 40HP
Join Date: Aug 2011
Posts: 5
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Yes its a 40efi. No alarms sounding, no faults logged for the computer to identify. I'll check out the regulator/rectifier. Happened again this evening after it had been idling for a while.
Thanks for your input.
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23 August 2011, 00:00
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#5
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Member
Country: UK - England
Town: Brum
Boat name: UTV
Make: Bombard Aerotec
Length: 3m +
Engine: 2 stroke 25hp
MMSI: 235933026
Join Date: May 2003
Posts: 744
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Oil level low?
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Big waves, small boat ;)
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23 August 2011, 08:37
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#6
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Member
Country: UK - Scotland
Town: Dunoon
Boat name: Humber
Make: Humber
Length: 4m +
Engine: outboard petrol 40HP
Join Date: Aug 2011
Posts: 5
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Oil level fine.
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24 August 2011, 10:55
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#7
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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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it will only go into guardian for either a oil fault (oil pressure switch?) or an overheat first check the thermostate or worse case senario the grommet between the leg and the adapterplate.
regards
alan
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24 August 2011, 21:46
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#8
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Member
Country: UK - Scotland
Town: Dunoon
Boat name: Humber
Make: Humber
Length: 4m +
Engine: outboard petrol 40HP
Join Date: Aug 2011
Posts: 5
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Thanks for that information. Replacement of the thermostat was the first fix tried, and I am beyond "the worst case scenario" as it is now two weeks since a strip down to check the grommet (which was fine, but was replaced anyway). Haven't had a chance yet to check out Portholme's suggestion of the regulator. The fault goes on and the frustration increases!!!
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27 August 2011, 14:36
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#9
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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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there was a service bulletin out on some voltage regulaters on some of the 40/50/60 hp efi, when i was working (retired now just under a year)i dont know if yours was done/or needed to be done at the time,it might even be out of the period for a warranty repair within the service bulletin time it might be worth checking,you will require your serial number.
regards
alan
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27 August 2011, 14:54
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#10
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Member
Country: UK - England
Town: Cambs
Make: Scorpion
Length: 8m +
Engine: 225 Opti
Join Date: Sep 2010
Posts: 356
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Warranty period ended sept 2008. Mine only just blew. Parts labour and vat totalled just under £300
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04 September 2011, 22:13
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#11
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Member
Country: UK - Scotland
Town: Dunoon
Boat name: Humber
Make: Humber
Length: 4m +
Engine: outboard petrol 40HP
Join Date: Aug 2011
Posts: 5
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Thanks Portholme and Uncle al for your input. Uncle al, Carlo says "Hi" & will try to get you on the phone to discuss this one! It's his brick wall!
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05 September 2011, 08:32
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#12
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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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Hi Carlo i no longer work at barrus i am retired, but all the best and nice to (talk?) to you.
regards
alan
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