Circuit breaker question
 

Both batteries are in good cond/fully charged.
7 mile run up river, anchored and listened to radio
with amps. about 2 hrs. later first battery was dead,
so I switched to bat # 2 fired motor, switched back to #1
and went for a 1/2 hr run.
When I returned to my anchor at idle lost all power
due to circuit breaker. Reset and was ok.
This happened again later under same circumstance.
Question is why.
Thanks GEO

Clean and tighten all connections very clen and tight its either this or a bad ciruit breaker or I think its charging more amps than
the breaker can handle to the dead battery ,measure the charge rate and raise the breaker to 10 amps more than the max it will charge ,this should fix it . hope so

Thanks, I will do both. The breaker is (only) 25 yrs old.
Thanks again
GEO