http://www.thehulltruth.com/boating-...a-150-sho.html
Another report here.
"We repowered a Conch27 with the Merc 150s. Original engines were 200HPDIs. Practically zero loss in performance and better than other Conchs with the Yamaha 150s. Torque is an important factor, especially in larger boats and larger seas. The Merc has plenty of it with the large 3 liter block."
"Locally, the Merc 150 has become the repower of choice for many charter guides on boats ranging from Conch27s, Whitewater 28s, and there's even a 31 yellowfin that has them and the captain loves the performance."