Hi all, I am new here, but not new to boating. I am an avid fan of my 1977 Glastron CVX-16. It has a 1977 Merc I-6 115hp. I bought it from Minnesota and live and boat in Denver, CO around 5-6000 feet asl. <br /><br />I did an exhaustive search in this forum regarding high altitude adjustments and think I have the right idea. It only turns 42-4400 rpms 41mph (GPS) with anywhere from 17 to 23", pitch props. It used to get 5000rpm and 50mph in MN. <br /><br />1) Is there anything else I should do besides re-jetting the carbs? It stumbles on acceleration sometimes and idles rough, but runs good at speed. <br /><br />2) After idling or running "no-wake" speeds for more than 5-10 mins, she smokes like a bandit upon take-off back to planing speeds for about 2-3 mins. Is this related to the running rich condition and can be solved with re-jetting? The plugs are not carboned up, but are oily after shutting down. <br /><br /><br />I have a series of repairs to do over winter, and want to have a good season next year. I plan on a water pump and fuel pump rebuild, come spring plan a "Seafoam" decarbing, and spending a day on the lake fine tuneing it come spring. Any other suggestions? <br /><br />Appreciate all the knowledge here and hope to contribute where I can. I previously had a 70hp 3cyl Merc and a 85hp Johnson. <br /><br />Regards, <br />Dennis