Many years ago the old 270, 280 and 290 stern drives as well as MS3, 4 and 5 inboard transmissions were reputed to be somewhat stronger with LH props as opposed to RH props, particularly when the engine
in question was pumped up significantly for racing
. This was because the RH rotation gear
in the upper gear
case was held in position by the case cover, while the LH drive gear was supported by the gear case, which was more rigid.
This was never a problem with the 110 or 120 saildrive
because there just wasn't enough power going thru the gears to cause any problems.
The MS25s and 130s saildrives use a different upper gear box and clutch
design which is equally robust with RH and LH props, so you shouldn't have any concerns with either prop rotation.