I have a 1987 60hp Mercury. It is bogging down when I try to accelerate in gear. I have had the carbs rebuilt. We have checked the stator, trigger, power pack (switch) by replacing them with new parts to just check one at a time for improvement and no improvement. The stator, switch and coils are all less then one year old. It is getting spark to the plugs but if you pull the plug wire off the #3 spark plug it does not affect the running of the engine. (you can see the spark jumping brightly when you hold the plug wire close to the spark plug but not connected. When you pull the plug it has fuel on it but it is not firing. IT seems like it is flooding with fuel on the #3 however if you pump the bulb no fuel is leaking out of the carbs. My mechanic and I are totally stumped. Do you have any ideas what to check. If I left out anything you need to know let me know and I will try to see explain better. I first took it in to get the carbs adjusted because it was not idleing good but I had no problem with acceleration. He could not get it to adjust and said there was debris in the carbs from deteorating fuel lines so recomended all new fuel lines, filter and carb overhaul. After that it idles perfect but now it bogs down when you try to accelerate in gear.
Thanks for any help!
Thanks for any help!