The tach is jumping several 1000 rpm while running, from 2000 to 4000, won't stay steady. With engine off, needle stays on 800rpm. Is the tach bad or could it be something else? Mechanic replaced the starter switch about 4 weeks ago, did not have a tach issue until switch was replaced and ran...
I have a 2008 50hp 2 stroke Mercury which dies after running a couple of minutes at 3000-3500rpm. Carbs and fuel pump have been rebuilt, new fuel lines and primer bulb. If bulb is squeezed (hard) it will get back up to rpm, but have to keep pumping bulb to keep it running. What else could be the...