Amps off alternator of '99 merc 9.9 manual start?

[Reel Knotty]

Hi All,

1999 Mercury 9.9 4 stroke manual start (Yamaha power head).

Anyone know the current I should see off this motor? I have it hooked up my house battery (have two battery setup with battery switch) to keep it happy wilst running my electronics. At idle I was seeing roughly 700 mA to 1 A. The battery was fully charged, and no only the TR-1 was running. When I revved it up a little (2500 RPM) I would see 2 A. The manual says it is a 6 A alternator...this seem right?

Thanks in advance for your replies.

[Orca]

I have a 2000 15HP, and recall the output to be 6A. Should be the same for 9.9.

[Starfish]

Most kickers put out very low current-- less than 1A-- while at trolling speeds. They'll put out their rated amperage only at full RPMs. There are a few exceptions so I have no idea what your motor is supposed to put out. I know that my 1996 Honda 8hp wasn't much use for battery charging but my 2003 T-8 Yamaha puts out more current than all my accessories can draw.

[1pump]

If the regulator is working right it will only put out it's full rating when it's higher than idle speed and under a big load, i.e. a partially charged batttery or running a bunch of lights.