Hi all,
I have an 1985 Evinrude 90. Starts fine, runs OK...though coughs every 20 seconds or so on idle. I have found my battery draws down after a couple of outings, so I tested my rectifier by checking for voltage at the battery running and off and see no difference. I also disconnected the battery while running, and found the rectifier is delivering 1.82 volts (I figure it should be around 14). So, it appears that the rectifier is not working properly, however, I am not sure. I have a few questions.
First, the VRO has been disconnected (prior owner)...could the way this has been done affect the charge generated by the rectifier? What is the proper way the rectifier should be wired with the VRO disconnected (wouldn't be in the manual)? How do I test?
Second, if the rectifier is not working properly, could this explain the cough every 20 seconds...like voltage is building up in the stator and then gives off every 20 seconds disrupting ignition? Or is the cough a separate issue? I have checked the timing and it seems OK. Also have new plugs and leads in the engine.
Third, do I need to replace the rectifier if it is not working...or can I just charge the battery now and then, and keep an extra in the boat for emergencies? What impact will just leaving it have?
Thanks.
I have an 1985 Evinrude 90. Starts fine, runs OK...though coughs every 20 seconds or so on idle. I have found my battery draws down after a couple of outings, so I tested my rectifier by checking for voltage at the battery running and off and see no difference. I also disconnected the battery while running, and found the rectifier is delivering 1.82 volts (I figure it should be around 14). So, it appears that the rectifier is not working properly, however, I am not sure. I have a few questions.
First, the VRO has been disconnected (prior owner)...could the way this has been done affect the charge generated by the rectifier? What is the proper way the rectifier should be wired with the VRO disconnected (wouldn't be in the manual)? How do I test?
Second, if the rectifier is not working properly, could this explain the cough every 20 seconds...like voltage is building up in the stator and then gives off every 20 seconds disrupting ignition? Or is the cough a separate issue? I have checked the timing and it seems OK. Also have new plugs and leads in the engine.
Third, do I need to replace the rectifier if it is not working...or can I just charge the battery now and then, and keep an extra in the boat for emergencies? What impact will just leaving it have?
Thanks.