A man with two watches

It is said that a man with a watch knows what time it is, but a man with two watches is never sure.    So it is for all mariners with dual propulsion.    I look at my RPM gauges (clocks with a counters, really) and it appears they are in sync.  But how accurate are they?   A small error of 20 rpm can increase the load on one engine 20% vs. the other.   Is the R terminal of the alternator really that accurate?   Is my synchronizer really working?   Now there's a way to be sure.   Timbolier's new fuel management system includes a precision photo-electric RPM pickup.    Much like the laser RPM tool your mechanic uses to set your idle, the Petrolier RPM pick uses a reflective Infra-Red beam to sense the speed of your engine to an accuracy of 1 RPM per 5000.   This reading is then transmitted digitally to your display for a super-accurate read-out. So Petrolier not only gives you data to optimize your fuel burn and reduces fuel costs, but also will increase the life of your engines by ensuring your balancing the load evenly over long voyages.