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Hello All I have a 1988 Yamaha 90 HP... Last year complete rebuild piston rings etc carbs were rebuilt new power trim motor and lower until seals This was completed by a excellent local mechanic and I could not believe how well it ran. Was winterized properly and used twice this year with the same results. I did not start it for a week or two and went down to give it a try and the motor started fine ran very well but when I brought it down to idle the motor ran like it was running on two cylinders then coughed and died.. ?? I tried it again today with a new set of plugs and had the same results..I was going to try changing out the spark plug caps because those are original but for now I tie wrapped them. I am not sure where to go from here could I have a bad coil? I have a new 24 gallon topside tank mounted on a Boston Whaler new spin on filter and changed the filter on the motor in the beginning of the season I use starton all the time.So my guess is the carbs are good..Any help would be appreciated Thank you
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