This might be a pretty dumb question. Anyhow, I have a Yamaha 40 - 4 stroke. When I go to start it, the first time I turn the key, it does not turn over. Sometimes it does that several times, and then it turns over. Is this normal for these engines? I had a ground post (in same compartment as starting battery) that had corroded due to water getting in. I just replaced this last night. One thing I noticed is that the negative post gets pretty hot after trying to start it. My gut is telling me that it is getting hot because it is a weak point / bottleneck considering the amperage load being put on the system. Is this ok?