Re: 1971 60 hp evinrude new float and needle valve - Needle valve sticking closed
air intake hose? where the reed valves are attached is on the backside of your intake manifold, the carbs bolt onto the front side of your intake manifold. there should not be any kind of hose for air to enter the engine, that im aware of, not with a system with carburetors. the air enters the engine through the carbs, if its entering anywhere else then you are having a lean(too much air) condition. if there is a hose around that area, it should be a fuel line, and if brown liquid is coming out of that line then you may have an issue with your gasoline, your gas should have a blueish tint to it. also dry off the reeds with a rag and make sure there isnt any kind of water sitting in there, or once again some crumby fuel. next, make sure your floats sit completely parallel with the carb when you turn them upside down with the bowl off, and what i mean by that is parallel with the surface of the carb where the bowl of the carb mates with the carb itself. once again should be upside down and completely parallel, if while its upside down and the float is raised above parallel, do not try to jam it down, you will damage the needle valve, gently adjust the float and if you have to push the float down, try to support the hinge lever so you arent jamming the needle into the carb. next thing, if when u rebuilt the carbs, did you make sure the idle needles were set the exact same way(if you removed them) when u put them back in the carbs?, if not you will have to screw them all the way in until they contact the base and then back them out 1 1/2 turns. do this to all three needles(if it is a three cyclinder engine that is, if not, just do the same to all the carbs that you have), from here you will have to re-tune the carbs to make sure the engine runs efficiently. lastly after checking the gas, setting the carbs, making sure that u have no air leaks, making sure spark is good, etc., make sure you have good compression in each cylinder. if your cylinders arent compressing the air/fuel mixture properly then your spark is not going to ignite the mixture, and your engine will not start, from there you will need to overhaul and fix the rings on the pistons, maybe the pistons themselves as well. if you ran that engine on some filthy brown gasoline, you may have messed things up(u said you had it running the other day). make sure you have good clean gas with the right oil and ratio mixture going into that engine. good luck, post back to see if you got anywhere