softbaitmaker Posted May 7, 2015 Report Share Posted May 7, 2015 Maybe some of you folks may have some ideas on this so will ask for help. Motor developed a miss on Sunday and it acted like spark plugs were misfiring so we put all new plugs in but it did not get rid of the miss. Brought her home and pull the cowling and ran a compression test. Each cylinder is holding 120-125 lbs. Thought it might be a coil because each cylinder has it's own coil to plug. Trouble is in number 4 cylinder. With boat running you can pull 1, 2, or 3 and motor drops out a lot. Pull number 4 and very little to no change. Moved # 1 coil to 4 and 4 to 1 and 1 was firing great but #4 still had same issue and did not drop out. That means it is not a coil issue. Checked all fuel filters for water and found none. Pumped out a quart of gas from tank into glass jar with primer bulb to see if any water in tank and got no water from tank. So now I am out of ideas. If anyone has experienced this issue and has any ideas on it all input would be greatly appreciated. When on the water it idles great but when you throttle up it starts to raise up and then falls on it's nose and won't throttle up if that helps. Quote Link to comment Share on other sites More sharing options...
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