Boat Tech

No, We could always read the hours on the efi engine from 1992 on out.-------------------------------------------------------------------------------------------------

[QUOTE=young-gun Hour meters can be unplugged, very very easily! What about older mercruiser carbed engines? I imagine they didnt have a hour meter in the engine itself?[/QUOTE] On some merc carbed engines starting around 96/97ish you could read the hours.

1996-Up MerCruiser Thunderbolt V
Ignition module support
The scan tool supports 1996-up MerCruiser Thunderbolt V
ignition modules. Technicians can access engine operating
hour data from the module and review the number of hours
an engine has operated in several preset RPM ranges.

http://www.rinda.com/marine/mtspec.htm