Re: 1976 70 hp intermittent problem
Take a look at the fuel system. Make sure there are no leaks in the hoses and connectors. I chased a similar problem for a long time and really wanted it to be an ignition issue. I finally broke down and got a manual and some carb kits. I found the problem during disassembly. It was a small chunk of dirt under the needle valve seat on one of the carbs. It was stopping fuel from filling the bowl properly.<br /><br />My symptoms were intermittant, sometimes it ran fine for short periods, sometimes even a few hours. Other times, it would not run much over idle speed. When I tried it would surge up an down. My advice is to go all the way through the fuel system first. I actually had several issues, including old hoses that did not have proper clamps on them, a weak fuel pump, and the dirt. You can address every issue in the fuel system for far less than you'll spend messing with the power packs, coils and such.
