Re: 3.0 L Mercuiser 2001 ser # 0m027691
Might want to recheck that SN, that number is for a 8.1L inboard, not a 3.0L IO.
Along with who/how on the carb rebuild, I would also be asking how the timing was set. A 2001 3.0L uses the Delco EST distributor and MUST be put into base timing mode in order to check timing and setting it to specs. If you just grabbed a timing light and turned the distributor, you are way off.