Thanks Don S

[tie_one_on]

Don S, thanks for helping with the information about "base" timing on my freind's 2000 Merc 5.7. He emailed me last night after he took it out for a test run. Said the boat ran better then new.
May I ask one dumb question? Why does Merc use this "base" timing? What gets by passed when put into base mode? Why couldn't a timing number be known when not in base mode, say 8 degrees or 12 degrees or what ever that figure would be?
Thanks again, first time I ever had to work on something this new.

 

[Don S]

Re: Thanks Don S

Since the advance timing and the knock module will keep the timing mark in constant motion with engine speed changes and someone turning the distributor. The the module is locked so it won't advance or change while setting the timing, and adjusting the carb. Once that is done, you unlock the timing so it can advance and retard as necessary during normal running.