I have a mid 70's 19 foot Fiberform boat with a inline 6 Mercruiser 165 hp engine. Took boat out of storage and was going to change oil and flush weatherization fluid. Started engine and had let it idle for about 15 minutes. Idled just fine.
I went to advance throttle and rev it up a little and after about 30 seconds at a little higher rpm engine quit. Tried to start it up again and it would start but then quit running. Tried starting it several times and every time it would start but not run. So I took a spark checker and connected it inline to all spark plugs and spark plug wires and would get spark on all plugs initially at start up but then would loose spark.
Don't think it is a fuel problem because when I advance throttle I can see fuel being squirted into throat of carburetor. This engine is equipped with a Mallory 540 Breakerless ignition system. I have checked all connection and they appear to be good.
Any help would be much appreciated.
I went to advance throttle and rev it up a little and after about 30 seconds at a little higher rpm engine quit. Tried to start it up again and it would start but then quit running. Tried starting it several times and every time it would start but not run. So I took a spark checker and connected it inline to all spark plugs and spark plug wires and would get spark on all plugs initially at start up but then would loose spark.
Don't think it is a fuel problem because when I advance throttle I can see fuel being squirted into throat of carburetor. This engine is equipped with a Mallory 540 Breakerless ignition system. I have checked all connection and they appear to be good.
Any help would be much appreciated.