Recently retired military experienced mechanic here but, new to boating. Just bought a boat with an inline 6 w/startability problems. As I understand it, these motors are dependable but can be hard to start. Ths thing runs great when it is running and starts well when warm.
It is getting good fire on all 6 and has compression on all 6 from 120-123.
It seems that a lot of fuel comes from the carbs when tilted also.
At first my friends kept telling me I was flooding it out but they came over to help. 1 person on the key, 1 on the primer bulb , and 1 on the manual choke. It took 10 minutes to get it started. (Electiric chokr does not work. Not getting voltage) seperate issue.
I am leaning towards rebuilding the carbs. they look fairly simple compared to a Quadrajet but, as with anything new. I need to ask a few questions and get some tips before wasting any money.
I already put a fuel pump kit in it. It did not look bad. Minimal rust and corrosion in pockets diaphram was not damaged and check valves functioning properly. Whether they are fully seating or not I am not sure. I guess I could empty the fuel pump and blow through it and pull a vacuum on it or something to check that.
Also a couple of other problems but I think I am on the right track here. It does not charge and the tach does not work. I am going to test the rectifier tomorrow.
Any tips suggestions or links would be very much appreciated.
Thanks in advance,