One motor producing 300 RPM less than the other at max power.

[pilot13]

Almost done with the brake in of a pair of DF175's, they acelerate In parallel up to 5200 RPM after that point the port motor start to fall behind to the point that at max power the starboard is producing around 5900 RPM and the port only produce 5550 to 5600 RPM. Power levers at the binnacle stay parallel up to 5200 RPM and I checked at the port motor and the power cable is moving to the max. Any Ideas of why is not producing the same RPM at max power?

[boats.net]

Could be the propellers you are using, or could be a defect in the motor. You should have your Suzuki dealer check it out.