2015 Larson 195 LX V6 4.3 MerCruiser
2015 Larson 195 LX V6 4.3 MerCruiser
I have a 2015 Larson 4.3 MerCruiser V6 220-HP. The engine Is running 5200-RPM at boat speed 40-MPH, and WOT hits 6000-RPM. On the back of the tachometer a dial is labeled 1 through 6 on dial, and is set to 1. Should this be set to 3 for a V6?
Re: 2015 Larson 195 LX V6 4.3 MerCruiser
Many tachometers are made with variable calibration settings. Usually the calibration number corresponds to the number of tachometer signal pulses that are generated in one engine crankshaft revolution. A setting of one would suggest one pulse per revolution. Setting the calibration to 3 would suggest three pulses per revolution. If those inferences were true for the tachometer you have, then if you are now reading 6000-RPM when set to CAL = 1, by changing to CAL = 3 the new reading would be 6000/3 = 2000. That seems much too low to be the true engine speed.
Check with the tachometer manufacturer for advice on the proper setting with the engine you have.
Check with the tachometer manufacturer for advice on the proper setting with the engine you have.