Jetgod
Member
I recently developed a problem on my port engine. I could see unburnt fuel in my exhaust at idle power settings. Seemed to work fine though. I ran the normal gauntlet of full tune-up,including all new plugs,wires,etc. Still had fuel spoting on the water thru exhaust. I spent hours reading different threads on CSR pertaining to this issue and had narrowed it down to something possibly wrong with the injectors. During my lengthly reasearch trying to solve this issue, I came across a battery thread where Frank Webster (fwebster) wrote this to another member, quote "The dash panel volt meter is the voltage across the port or stbd battery bank. With the ignition switch in the on position you should see the battery voltage.......with the engine started and running, you see the voltage across the battery with the alternator functioning......off, it should read 12.6v or a little higher; with the alternator running look for 13.5 to 14.0 volts. If the voltage is 12.0 or lower it indicates a week battery. In that case the actual voltage with the starting load is applied may drop to 8 or 9V and most ECM controlled engines require a minimum of 10VDC to run." end quote. I also came across another thread ,that I could not find again ,outlining how the ECU works between a certain voltage and it can get mixed up when all the bits and bites aren't being powered consistently and at the correct voltage if it has a bad battery. Well....I got to thinking about my 7 year old batteries and thought it would be a good idea to test the port battery.The battery was, by all indications to me, working fine and never getting run down. I took the battery out and went to get it load tested. Battery tech sees the acid levels are all good, acidity check all good and then he does the load test. Well the test showed the battery dropping down to 8.9 volts under load. He said it was no good. Great,I think to myself.Maybe that is my problem. I buy a new battery and off to the boat to install. A long the way I am thinking this seems too good to be true, but I am hoping. Well, I installed the new battery,fired up the engine and low and behold, no fuel spots. I took it out for a long run and came back to the marina. Engine ran like a top and no un burnt fuel showing. I just wanted to thank CSR, its members and especially Mr Webster. His input on this forum allowed me to find an easy fix to a possibly complex issue. If I can't fix it, I can't boat so this Forum alllows the do it yr selfer to have a chance. Thanks again to Frank and all the contributors on this site. It is truly amazing.:smt038:smt038:smt038:smt038:smt038:smt038:smt038
