225 Suzuki chargeing

[BrianH]

1998 225 Suzuki 2 stroke
What should my charging system be puting out at 1000 rpm or lower when trolling?
my volt meter shows about 12 volts maybe 12.5 volts
when I take it up to say 1200 Rpm I get 13 volts or better
I'm afraid its not charging and running on the battery at low speed
I've done the ohms test on the coils and they meet the manufactura's specifications
I'm thinking I need to replace the rectifier/regulator
Anybody got any ideas?