1971 50hp wont stay running

[hopej13]

1971 50hp evinrude lark. Cleaned out both carbs changed fuel line on carbs used clean gas and put a fuel filter between bulb and fuel filter and pump in middle of hose. Try to crank and will turn over and fire up give throttle dies and sometimes won't even fire up anybody have any suggestions let me know thanks

[scarab1967]

Have you checked your tank breather? if ok, try just just tank, prime bulb and motor, eliminate everything in between, this will help you see if it's a motor issue or the setup. Any carb's adjustments that may have moved? have you checked spark as well?