I've got an early to mid eighties 18hp merc (serial 7198298).
It's got electric start with controls.
Should it charge the battery while running?
I checked with my multi-meter and it was not.
I use a group 31 deep cycle as a starting battery and keep a trolling motor on board to get me home in case the main motor fails and just assumed till afew weeks ago that it was staying fully charged with the amount that I use the boat.
Was a bit shocked to see the battery voltage down to 12.18 with the motor off and 12.08 with the engine running the second last boating weekend.
Thanks guys
It's got electric start with controls.
Should it charge the battery while running?
I checked with my multi-meter and it was not.
I use a group 31 deep cycle as a starting battery and keep a trolling motor on board to get me home in case the main motor fails and just assumed till afew weeks ago that it was staying fully charged with the amount that I use the boat.
Was a bit shocked to see the battery voltage down to 12.18 with the motor off and 12.08 with the engine running the second last boating weekend.
Thanks guys