Dead Starter Batteries when Gen Set Running?

ALLFORARIALLFORARI Member Posts: 45 ✭✭
in Rinker Custom Projects
Had her out this weekend at the beach and ran AC and DC on with Gen Set running.  Went to start after 5-6 hours and had nothing at 1st then got one to fire on Emergency but not the 2nd.  Waited 10-15 min and then second started. Assume engine 1 charged batteries enough for Battery to fire engine 2?  Shouldn't Gen set charge batteries when its on if switch for Bat Charger is on in control panel?  Any ideas on fix so it doesn't happen again?  Never had a problem when boat is on shore power. Thanks
· Share on Facebook

Comments

  • StodgeStodge Member Posts: 2,738 ✭✭✭✭
    The genny will charge the batteries if you have the battery charger turned on at the power panel.  

    2002 FV 342 on Lake St. Clair - Past Commodore SHC - Vessel Examiner USCGAUX

    · Share on Facebook
  • ALLFORARIALLFORARI Member Posts: 45 ✭✭
    Both were in the on position. 
    · Share on Facebook
  • StodgeStodge Member Posts: 2,738 ✭✭✭✭
    When you get a chance, start the genny then watch the DC voltage when you turn on the battery charger.  It should go up a bit.

    2002 FV 342 on Lake St. Clair - Past Commodore SHC - Vessel Examiner USCGAUX

    · Share on Facebook
  • ALLFORARIALLFORARI Member Posts: 45 ✭✭
    Thanks Stodge.  DC voltage on the Battery charger or DC voltage on main panel?
    · Share on Facebook
  • StodgeStodge Member Posts: 2,738 ✭✭✭✭
    Guess the first question I should ask is: Does the battery charger work on shore power?

    Main panel should show an increase.  I want to say the battery charger shows amps, not volts.  But that's my charger.

    If you don't see an increase in volts you have have an issue with your battery charger.

    2002 FV 342 on Lake St. Clair - Past Commodore SHC - Vessel Examiner USCGAUX

    · Share on Facebook
  • ALLFORARIALLFORARI Member Posts: 45 ✭✭
     I swapped out both starter battery since the Previous owner had not replaced him in five years. I thought that fixed the problem as she started right up yesterday. Went down today and the issue is back. I wonder if it’s the isolator as the charger seems to be working?
    · Share on Facebook
  • ALLFORARIALLFORARI Member Posts: 45 ✭✭
     Good news. I jumped on the boat yesterday and it wouldn’t turn over While on the hook. Why is that good news you ask? Because that told me that the batteries were not taking a charge, I replaced them and now all is good. Come to find out the previous owner had replace those batteries in nearly 5 years 
    · Share on Facebook
  • Handymans342Handymans342 Member Posts: 10,375 ✭✭✭✭✭
    Is the isolator original?
    · Share on Facebook
  • jhofmannjhofmann Member Posts: 430 ✭✭✭
    Used to have a cuddy cabin with a single battery and got in the habit of bringing a charged jump-pak with me, and still do today even though I have a seperate starting and deepcycle house battery. Better to have it and not need it, than to need it and not have it!
    · Share on Facebook
  • ALLFORARIALLFORARI Member Posts: 45 ✭✭
    Yes original I believe. 
    · Share on Facebook
  • zaverin1zaverin1 Member Posts: 1,672 ✭✭✭
    You check for actual voltage going into your batteries either from the shore or gen?
    it would be coming out of the battery charger either way
    what I am saying is new batteries are just that new.
    they have a charge and new cells 
    if your charger dosent work you will soon be facing the same problem.
    only charge you get is when your boat is running if your charger is dead
    · Share on Facebook
  • ALLFORARIALLFORARI Member Posts: 45 ✭✭
    Hey guys. Sorry for the delayed response. It turned out it was a selenoid. Cheap fix. Thanks for all the advice
    · Share on Facebook
Sign In or Register to comment.