I plan to repower my '97 Gulfstream w/twin 150 Suzuki's in the near future. The cost of the Yamaha's are WAY over priced and everyone including Yamaha dealers say Suzuki OWNS the repower market. The Suzuki's also come with a 6 year warranty standard. I plan to use Dann's Marine on the Maryland Eastern shore. According to the owner, I will decrease fuel consumption by almost 1/3 and gain a better top end. The 150's use a 17in prop w/ 17 degree pitch if I recall. My Gulfstream is over 7k loaded. .Good luck with your decision.