I purchased a late model used Yamaha 150 4-stroke from Josh Piver in Dec. 2011. It was reconditioned and in great shape. While it ran well, it did tend to choke down in a narrow R.P.M. range of 1500 to 1700. I brought it back and they put it on the computer and quickly corrected the problem, at no charge. I have found Josh to be consistently courteous and knowledgeable about Yamaha. Recently the boat fuel gauge quit working. Another repair service told me it was a bad gauge. Shaver St. determined that the problem was only a corroded sender wire. I have been consistently satisfied.