I have a 32 Fever with 500 HPs and the Starboard Motor runs about 150-200 RPM slower? Is this common or is this enough of an RPM difference to be concerned? Sorry this is my first twin motor boat. Last two boats were 29 Fevers with single.

Could be a variety of different things .... If you have "out of the box" props, could be prop to prop variation, could also be slight variation in engine hp to engine hp, or could be that the tachs are off a little. Do you hear a pulsing sound from the exhaust noise at all when running with this rpm difference? (the pulsation in the noise is called "beat frequency" and it happens when two sounds are slightly different frequencies ... as the two frequencies (engine rpms) get get closer together, the "pulsation" sound spreads out, until they are both the same frequency ( same engine rpm) and the pulsation sound goes away). If you use the throttles to get the two "apparent rpms" close to the same, according to the tachometers, watch the tachs and listen .... when you hear this pulsation disappear, the engines are really close to the same actual rpm ... look at the tachs again and see how far apart the rpms are showing. That would be your tachometer error between the two tachometers. You can also use this to speed match your engines ... set them at "the same speed" and slightly move one of the throttles until you start to hear a drawn out "waaa-waaa-waaa-waaa" noise from the exhaust mixed with the normal sound, then move the same throttle a little more and listen to what happens. As the actual engine speeds get further apart, the "waaa-waaa" will get quicker, up to a point when the speeds get to far apart and this phenomenon goes away. When you bring the two engine speeds closer together the pulsation is drawn out and when it disappears, both engines are really close to the same rpm. You are using your ears as a synchronizer Try it! If you google "beat frequency", there are examples of this on youtube. You can hear this inside jet aircraft with fuselage mounted engines a lot of times when they are taxiing down the runway, or when the drop the throttles during decent, sometimes. Its the same thing, they are at slightly different speeds.

Thanks for the info Bob. No I don't really hear any difference in sound while crushing. At idle the starboard motor does idle a little lower. I never thought of the prop thing and I may switch back to the bravo 1s and see. While running the torgue and power feels good and no concerning sounds so I'm hoping its just a tac thing or throttle adjustment or prop. I hope its not due to a weaker motor. I understand all motors aren't created equal but I just hope one is not unhealthy.

What speeds and rpm are you seeing with your set up?

could it possibly be the carbs if you have carbs. I have to carb engines and they both run a little different