2004 9.9 mercury 2-stroke half power

Discussion in 'Outboards' started by kenrahe, Apr 18, 2010.

  1. capt littlelegs
    Joined: Apr 2010
    Posts: 237
    Likes: 8, Points: 0, Legacy Rep: -67
    Location: England

    capt littlelegs New Member

    Sorry meant it's unlikely to be the fault if it running on other cylinder with a single carb. Just do a comparison resistance check on the coils, you'd need to disconnect them first. The Colortune is a glass topped spark plug that lets you to look into the cylinder and see what the spark and combustion flame colour are doing. If you don't have one don't worry just run the engine on the good cylinder while observing the suspect spark on a spare plug fixed to the head. If it's nice and strong and continuous the ignition should be ok.

  2. El Sea
    Joined: Aug 2006
    Posts: 55
    Likes: 1, Points: 0, Legacy Rep: 36
    Location: St Petersburg, Florida

    El Sea Junior Member

    One of the first things I recommend to problematic gas engines:
    try running on a fresh 6 gallon can of gas, isolate the main tank until fuel or engine is the issue.

    El Sea/L.C.

    "Suckin Sludge & Havin a Gas"
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