Just curious if anyone carries a jump start battery and if so how much power does it produce? I have a Yanmar 3GMF and an isolated starting battery. When I motor I place the battery switch in the "ALL" position. I admit that every once in a while I forget to switch it to the house side when the engine is off. It's never caused a problem but I decided it would be a good investment to get one of those jump start batteries just in case I really draw down both the starter and house batteries. I read my engine manual and it stated the engine needed 75 amps to turn over. So I bought a 300 amp battery jump starter. It's the type that has a small air compressor included. I decided to test it out but it wasn't powerful enough to start the Yanmar. I disconnected the cables from the on board starter battery and connected them to the jump starter. When I turned the ignition key it just wasn't nearly enough power to turn the engine over. I released two of the compression levers to see if that would help but still it wasn't enough.
Maybe I read the engine manual incorrectly and it requires a more powerful battery. I'm looking for some advice. I already have Boat US unlimited and my insurance policy will also pay up to $500 but I'd prefer a quicker remedy in the event I encounter this problem.
Thanks,
Joe Mullee
Maybe I read the engine manual incorrectly and it requires a more powerful battery. I'm looking for some advice. I already have Boat US unlimited and my insurance policy will also pay up to $500 but I'd prefer a quicker remedy in the event I encounter this problem.
Thanks,
Joe Mullee