Power loss at high rpm Mercury 15hp 1990

[Dutchdude]

Hi,<br /><br />Just bought this outboard, runs fine the first time, but the second time it started to run rough at full throttle. At Low and midrange speed the engine runs fine.<br />- Bought new sparkplugs, no result, <br />- Mercury Dealer cleaned the carb. en placed a new fuelpump, no resul, <br />- Checked the ignition timming at low and high speed, ok, <br />- Bought the repair manual and checked the Low speed charge coil (3150 Ohm) and high speed charge coil (133 Ohm). The high speed charge coil should be between 200-250 Ohm.<br />And now?? buy a new charge coil?? <br />Give me some advise please..<br /><br />Greatings,<br />Dutchdude<br />p.s. Sorry for the language, i'm really Dutch

 

[roscoe]

Re: Power loss at high rpm Mercury 15hp 1990

You are not Dutch here.<br />You are a boater!!!<br /><br />Sorry for what language??<br /><br />I am no expert on ignitions, but you seem to have found the problem. I hope a new high speed coil solves the problem. <br /><br />Also, it helps to curse a bit when working on an engine.