48hp Johnson not recharging battery

Wayne Burgess

Cadet
Thread starter
Joined
Nov 3, 2008
Messages
27
My 48hp Johnson is not recharging my cranking battery. Where do I begin checking what to replace?
 

oldboat1

Fleet Admiral
Joined
Apr 3, 2002
Messages
9,612
Almost always a rectifier problem. Can be damaged in a number of ways -- loose or corroded connections, disconnect battery while running, reversed polarity at any point. Do a search here for testing rectifiers.
 

ondarvr

Supreme Mariner
Joined
Apr 6, 2005
Messages
11,527
Make sure all of the wire connections are good, but most of the time it's the rectifier/regulator, depending on your exact motor it may have both, or just a rectifier.
 
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