Transom failures: I/O vs. O/B

[gw204f]

I'm half-heartedly looking for a very inexpensive V20 to kick around in for the next few years until the budget allows for something bigger/newer/nicer/etc. I'm hoping to find one that is structurally solid that only needs cosmetics and/or minor work to the power.

With that in mind, I was wondering if there is a difference in the transom failure rate of the I/O V20s and O/B V20s? My gut tells me that the O/B models are far more susceptible to transom rot due to the molding that protects/seals the top edge of the motor cutout and the engine mounting bolts. Can any of you guys confirm this?

I/O power is certainly not my first choice, but I would rather deal with it for a few years than have to dive right in to a transom rebuild.

Thanks.