Hey guys - I purchased a 17' center console with a DT140 a few weeks ago. The boat is a 1988, and I believe that the motor is as well.<br /><br />It has been used sparingly over the last few years, and I was advised it was in good running order - they were wrong, but as I only paid $1500 for the whole setup I am willing to spend some time and effort to make it right.<br /><br />I have replaced the control box and cables as they were very stiff and one of the cables was damaged. I also repaired the steering cable which was stuck in the outboard. I also replaced the lower unit oil.<br /><br />bought an impeller kit, but due to some seriously stuck bolts I put that on hold for a few weeks.<br /><br />Here is the main problem. In neutral, the engine seems smooth, and runs great (revved up to around 5,000 RPM with ease). I launched it this morning here in Tampa Bay, and instantly noticed a problem. The boat would not plane and is seriously down on power. In gear, max RPM was about 2500 RPM, and speed was about 8mph on the GPS. Made the short but slow ride over to where I wanted to fish, and on the way back we experimented by adding a little more weight to the bow. We got it on a plane and speed to about 20mph at 3000 - 3200 RPM or so. As soon as it was down off plane we were back to 8mph at full throttle and 2500 RPM.<br /><br />What could cause the lack of power?<br /><br />I know the gas in the tank was old, but I topped it with fresh gas.<br /><br />Plugs are like new<br /><br />Checked the linkage, it is getting full throw on the throttle<br /><br />I have a pretty mechanical background, and don't mind diving into this myself. Any suggestions on what to look for?<br /><br />Thanks!
