150HP Johnson

[vcs]

I have a Evinrude 175 on my 18 with bracket no problems

[htillman]

I would fog the motor until you get it installed on your boat. Then once you have it installed and rigged. Take it to your outboard mechanic for a checkup, test run and adjust as necessary. I just did the same to two Johnsons I switched on two 23 Seacrafts. He did find a couple of problems with each motor, average cost for his work was $300.00 - I think worth it.