hildebrandr990
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- Jan 24, 2016
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I have a 2003 Merc 60/40 2 stroke it has lean sneeze issue idles fine and runs wot great only sneezes when slowing down and about 1/4 throttle while scanning about 3.5-4mph carbs have been cleaned and all gaskets replaced idle mixture screws are set at 1 1/2turns out factory manual says 1 1/4 turns but idles and starts better at 1 1/2 checked for air leaks and synced the carbs also replaced the reeds with Carson fiber reeds problem was the same before changing the reeds also upper and lower crankshaft seals have been replaced bottom one was definitely bad after changing them the problem got much better but it's still there also replaced the fuel lines and rebuilt the fuel pump checking the spark plugs after idling for 10min shows it being rich so I'm lost I considered the timing but service manual says idle timing is 2°BTDC and it's spot on hope this is posted in the right place any help would be greatly appreciated
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