Hi everybody<br />bought a 1980 80hp mercury outboard motor<br />water pump had gone out but had been <br />replaced before I bought it, was told <br />engine got hot and top cylinder was <br />low on compression but said it ran good <br />but wouldn't idle and had to baby it <br />up to full rpms or it would kill.<br /><br />ran motor on the water, would die if idled <br />to long, die if you gave it to much <br />throttle to fast, would clear out <br />and go 40mph. replaced top piston <br />and new rings on all cylinders, <br />disassemble/cleaned carbs. <br /><br />still die at idle, die if given to <br />much throttle, still got 40mph <br />after motor got going.<br /><br />went to adjust idle screw and saw gas <br />coming out of lower carb. adjusted <br />float, now it idles great. still dies <br />if given to much throttle at one time.<br /> pumped gas bulb, sprayed wd40 in carb <br />intake when giving throttle, no change.<br /><br />down to either to much gas or the <br />timing is off. does anyone <br />know what the timing is for a <br />1980 80 hp merc 4 cyclinder with<br />the thunderbolt ignition or have <br />any other ideas?<br /><br />thanks in advance
