I have a 2013 model Etec 40. My question is that the owner manual shows that the ECM/EMM should be capable of providing 25 amp battery charging. Not sure that mine is. I am thinking that i shoud see 13.2 - 13.8 volts at the battery if being charged properly from the engine. same as i would see from an alternator. New battery, all connections have been thoroughly cleaned and check. Is this charge voltage assumption correct? When i look at pictures of the ECM/EMM it has a label showing what i believe to be LED indicators for different faults in the ECM/EMM. Is this correct? Located next to the raw water connections?
up to 14.6 volts for a fully charged battery, less voltage during charging.
Use an ammeter and a load tester to find actual or max. charging amperage
"There is never just one thing wrong with a boat";
-- Travis McGee, main character in a book series by John D. McDonald
The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.
The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.