Twin tohatsu/nissan TLDI 135s on bracket?

[KenB]

So I decided to pass on the hondas... it was a great deal but too much of a commitment too soon. I still have about a year's worth of work before I look at engines.

BUT twins got me thinking. I have heard good things about tohatsu TLDI (same technology license as optimax; merc gets 150 hp and above, Tohatsu gets 150 and below)) and I know there is a tohatsu 135 hp on the horizon. This is basically the same engine block as the old 140 (inline 4), but with the orbital low pressure oil injection/EFI. I was over in Japan last fall and was able to visit a few commercial fishing harbors. Everyone had yanmar and yamaha small block inboard diesels. The few big block outboards were either TLDI or Yammy 4s, with nothing over 150 hp. I did talk to one boat yard, and they were very actively pushing the TLDI, making a lot of the same points that the ETEC guys in the US make (i.e. weight, moving parts, ease of use, fuel economy, etc.)

SO my question is; aside from dealer network (which is not an issue for me in the northeast) and the fact that the don't actually exist yet, is there an obvious reason not to do twin 135s?