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Boat Maintenance Forum


johnson 15 hp outboard

Anonymous user

06 May 2007 10:55:55

Joined: Unknown | Posts: Unknown

i have a 15 hp johnson outboard with ohm controls, the problem i have is when i start she runs pefect for about 1 hour 40 mins, then cuts out it then will restart after about 30 mins with no problems then runs maybe 10 mins maximum before stopping again ,it has just had a service the last few days, with new spark plugs fitted any ideas what the problem could be
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Re: johnson 15 hp outboard

Anonymous user

10 May 2007 10:03:20

Joined: Unknown | Posts: Unknown

Hi.
i have johnson15 fourstroke, and i have same problem, it start good but i running maybe 40min it stopped. then i wait 5min and it start again, running again 30min and then stop.......
Timo from Finland
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Re: johnson 15 hp outboard

Anonymous user

25 May 2007 18:58:13

Joined: Unknown | Posts: Unknown

i have since been told that it is 99% certain that the problem with my outboard is the powerpack
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Re: johnson 15 hp outboard

Anonymous user

26 May 2007 16:51:55

Joined: Unknown | Posts: Unknown

It sounds Like an electrical problem. have you check your alarms sensors?
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Re: johnson 15 hp outboard

Anonymous user

04 June 2007 04:13:29

Joined: Unknown | Posts: Unknown

i have chanced powerpack but problem stay.......i know it is electrical problem but where it is ?????
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Re: johnson 15 hp outboard

Anonymous user

04 June 2007 07:57:31

Joined: Unknown | Posts: Unknown

you may check the sensors, it may be the temperature sensor.
make shure the engine is cooling properly ,feeling the water temp ,
it my be capacitor which sends sparks to spark plugs that gets humid and fails..
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Re: johnson 15 hp outboard

Anonymous user

22 July 2009 21:38:42

Joined: Unknown | Posts: Unknown

get your self a can of b-12 chem tool you are most likely running bad gas mix it with b-12 and it will be fine
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Re: johnson 15 hp outboard

Anonymous user

11 August 2009 18:41:34

Joined: Unknown | Posts: Unknown

i would like to by your motor

email back at jacob_crews5@yahoo.com
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Re: johnson 15 hp outboard

Anonymous user

19 February 2011 16:33:39

Joined: Unknown | Posts: Unknown

It sounds like it's overheating sort out before you do any damage I had the same symtoms and pump impellor &blocked water channels were the problem
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