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Old 10 August 2017, 17:20   #1
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outboard problems

Hi today ive started up my 15hp johnson 15RL74S outboard at first water was coming out of outlet then white smoke then water and smoke..the outboard has not been started for 3 years also the petrol/2 stroke is 3 years old as well..any help really would be appreciated as i have no idea about outboards...THANKS
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Old 11 August 2017, 04:21   #2
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Possible thermostat, blockage or water pump issue. Given lack of use a new water pump wouldn't do any harm. Try some strimmer wire or something in the tell tale hole and see if that helps mean time. Don't run it long until you know it is cooling correctly.

Since you are not familiar with them I would look for a service manual if you want to tinker or take it to your local outboard shop.
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Old 11 August 2017, 05:05   #3
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I'd change the fuel for new as well. Rules out another possible cause.
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Old 11 August 2017, 05:55   #4
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how long did you run it for?
did it stop or did you shut it off?
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Old 11 August 2017, 16:06   #5
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at times it stopped today its been ticking over nice but still with water and smoke coming out of outlet...i live in birmingham so not very many outboard specialists around..
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Old 11 August 2017, 18:27   #6
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Very stale fuel will cause white smoke. Flush it out and put fresh stuff in and make sure the mix is right.
Water out the exhaust........fairly normal. Most of the coolant water will come out the prop hub (if it's in the water you'll never see it), some from the "tell tail" and a bit of spray out the exhaust on the leg. Doesn't sound like a problem.
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Old 12 August 2017, 11:39   #7
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I must say the replies are really helpful...THANKS...To change the impeller do i have to replace gaskets will i need sealant is the job easy for a novice (im not to bad at taking things apart fixing them putting them back together) many thanks
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Old 12 August 2017, 13:46   #8
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It's an easy job just buy the service kit for the pump do your gear box oil at the same time whilst the lower leg is off . Get on YouTube for danger marine he does some good videos or DRAYS shop same stuff. Central marine services in Ilkeston will do it if you don't want the hassle.
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Old 12 August 2017, 14:41   #9
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just check the cylinders warm up, but don't get hot. Think domestic rad temps.
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