E250FPLSR
2004 Evinrude 250
The engine lost power during Holeshot…. The engine was spooling up just fine then all of a sudden it just dropped RPM for a second then picked back up. The holeshot was slower than normal after that and you could tell the engine was working to get up on plane. I also noticed that the throttle response was not there as well as power. Something was not right. The engine will start just fine and sounds normal at idle.
I pulled the hood and removed the air silencer for the throttle bodies. This is when I noticed that the top port cylinder was blowing air out of the throttle body instead of sucking air in. Broken reed right?...….well I pulled that plug and it was covered with carbon so I'm still thinking reed.
Fast forward to today. I pulled the throttle body to look at the reeds and nothing is broken. They may be weak and not seating like they should? I did a compression check and its 110 on all 6 cylinders so that's good. When I pulled the plugs I noticed the bottom port cylinder plug was loaded up with carbon as well. the rest of the plugs were fine. spark problem??
I'm not sure if it's a spark issue or a fuel issue. When I hook up the diagnostic software will it show me a bad or weak injector? Can I also check the ignition system with the software? Not sure where to go with it next so i'm open to ideas.
Thank you,
Joe