Battery Won't Charge While Engine Runs
 

Thanks for replies.
Gene - Alt (marine SAE J1171) says Arco #60109. Also says made by Mando
on back. 55A.
Will get a Merc belt tho have been told not crucial.
mutimeter question -- not a clip-on. Probe style.

Jim - Thnx for fuse and ground info.

Battery Won't Charge While Engine Runs
 

84 you probably have all sorts of bad connections due to corrosion.
Start at the battery, after charging it, with your voltmeter and then
move down the line to see how much the voltage drops at various places.

wrote:
Thanks for replies.
Gene - Alt (marine SAE J1171) says Arco #60109. Also says made by Mando
on back. 55A.
Will get a Merc belt tho have been told not crucial.
mutimeter question -- not a clip-on. Probe style.

Jim - Thnx for fuse and ground info.

Battery Won't Charge While Engine Runs
 

In article . com,
says...
Thanks for replies.
Gene - Alt (marine SAE J1171) says Arco #60109. Also says made by Mando
on back. 55A.
Will get a Merc belt tho have been told not crucial.
mutimeter question -- not a clip-on. Probe style.

Jim - Thnx for fuse and ground info.



As another poster mentioned, you must put the meter in series with the
alternator and load when measuring current.

If you truly read 40A (which you didn't), something had to be PULLING
that much current. The only thing on your boat that would pull that kind
of current, other than a serious short, would be the starter motor.

Battery Won't Charge While Engine Runs
 

THANKS to all for the great advice!

Works fine now, after:
-- had Alt Shop bench test alternator. Runs fine.
-- replacing fuse block on back of starter (white plastic thing)
-- wire brushing and repainting pulleys
-- finding/replacing a badly corroded inline 10A fuse/fuseholder that
was on thin wire to bilge pump
-- wire brushing corrosion off of battposts and as many wires/fittings
as I coul reach
-- new merc belts

Also everyone who caught my mistake about 40A on back of Alt...You were
right.

Ran all day yesterday on prettiest day of the summer. THANKS again!

STB