[john-206]

I have a Yamaha 9.9 Four stroke outboard. It has an electrical output socket on it for charging the battery.I wanted to know if I could just plug a lead in it and keep the battery charged, but I have received conflicting advice. Some folk say I can some say I canÂ’t because my engine doesnÂ’t have an electric start.Help please!Thanks John

[rodbolt]

does it have just the two green leads going to a socket or do the leads go to a rectifier first ?some engines had an AC lighting option that can be converted to a DC system with the addition of a rectifier.

[john-206]

Hi thanx I'll have a look tomorrow.If it just has 2 green leads going to the socket and it needs a rectifier where do I get one from? are they easy to install (I used to be a car mechanic but Know nothing about these engines) And where would I get a lead to plug into the socket and would it just clip on the battery with crocodile clips?Just bought first boat!!!

[rodbolt]

most any air cooled rectifier capeable of 9 amps or so will work, the yamaha dealer will have a part #, I cant help but so much cause the model and seriel numbers are a bit different from the US marketed beasts.

[john-206]

I have now fitted a rectifier and it is working well. Thanks for the help!!!