Hi-i have twin 350 CI Crusaders (1987)-both of which were changed over to electronic ignition a few years ago.Last year the port engine began to "drop out" (not stall) intermitently, at various times, idle or running. It would normally restart with no problem until last septemeber when it occured about 20 times durring a 30 min trip.I'm suspicious it is electrical so I have changed the coil and ignition switch but it still happens although i havent taken the boat out yet this year so it is only at idle so far.any ideas?
Make (of engine): Crussader
Model (of engine): 350
see previous question
You should check the fuel pump pressure 4-5lbs.
Could the fuel pump cause such an intermident problem? I know there have been a lot of problems due to the ethanol in the fuel but the engine starts fast, idles well and runs great at plane unless it decides to turn it self off. It is not starving for fuel-does not hesitate it will just turn off at very random times.
From your diagnosis it doesn't appear to be a fuel system problem. You are loosing the ignition circuit. Check the engine harness plug for good connection. The original ignition had a coil without internal resistor . A ballast resistor was used instead. was this bypassed or removed when the up grade was installed ?
Thanksfor getting back. i will check the harness-I dont think the coil is the problem as I changed it out last year when this problem first started and the problem continues with the new coil.
30 years professional marine mechanic=skilled in all phases of the marine service industry.
thought you might like to know: I changed out the electronic ignition and changed the plugs which resolved the problem. Interestingly-the other engine did have a resistor but this one didnt so i also changed the coil to one that had a resistor (suggested by Mallory).
Thanks again for your help