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Update 2.
Hooked tach backup while having new ignition coil installed. 90 minutes into ride, misfires again. Up to that point perfect as always, after misfire will start and idle perfect all day, then Once it reaches 2000 rpm starts misfiring.
Update. After 12 hours of running without tach all was good, which consisted of 30-90 minute rides. Go out today, starts misfiring after 2 hours of run time?
Have ran it twice now with tach unhooked for at least 90 minutes. No misfires, runs smooth. Only odd thing is a couple of brief instances where boat doesn’t slow but there is a “dragging” sensation. Engine changes sound briefly but doesn’t slow? Sorry, that’s the only way I can describe it.
Hello, I have a ‘99 Searay signature 230, 5.7 merc., 400 hours. Recently tach jumped all over and engine misfiring. Tach erratic with no change in engine as well.Only does this after 1 1/2 -2 hours running time. Idles perfect. Runs perfect for short excursions.
This spring had I new distributor...
