FunFlatsFishing Posted March 17, 2017 Report Share Posted March 17, 2017 So where shall I begin? With the battery switch on 1 or 2 the engine will hardly crank if at all. With it on both, it starts right up no problem. Battery 1 is about 6 months old. Battery 2 (&3) are brand new. One week old. All batteries are Duracell AGM 31 series 800 CCA at 0 degrees. The engine is a 2006 Yamaha F150. Also I keep them charged with the onboard 3 bank charger. Battery switch? Battery cables? Terminals? Starter motor? Where shall I begin and how can I figure this out the most efficiently. Link to comment Share on other sites More sharing options...
SCFD rtrd. Posted March 18, 2017 Report Share Posted March 18, 2017 Here's what I'd do, but keep in mind, I'm not a mechanic. First make sure all your battery cables are clean and tight from the batteries to the battery switch. If nothing changes, remove the positive cable (battery #1) from the battery switch and connect it to the cable going to the starter with a bolt and nut. Make sure the wires don't short against anything during this process. This will determine if battery #1 cable is good. Do the same with battery #2 cable. If the engine starts as is should, then the problem is with the battery switch. Link to comment Share on other sites More sharing options...
Bamaskeet Posted March 18, 2017 Report Share Posted March 18, 2017 Is the engine a F150? Link to comment Share on other sites More sharing options...
FunFlatsFishing Posted March 18, 2017 Author Report Share Posted March 18, 2017 Yes Link to comment Share on other sites More sharing options...
Bamaskeet Posted March 18, 2017 Report Share Posted March 18, 2017 I have a similar problem with my 2000V. I've done some research on the Internet. It could be a loose wire anywhere from the battery cables to starter relay or perhaps the ground. if it's not a loose wire, it's likely your starter relay. Link to comment Share on other sites More sharing options...
fin-addict Posted March 18, 2017 Report Share Posted March 18, 2017 did you have this problem before installing the new batteries. Link to comment Share on other sites More sharing options...
FunFlatsFishing Posted March 18, 2017 Author Report Share Posted March 18, 2017 45 minutes ago, fin-addict said: did you have this problem before installing the new batteries. Yes but it seems to have gotten worse. Link to comment Share on other sites More sharing options...
polliwog Posted March 18, 2017 Report Share Posted March 18, 2017 Check the cables from battery to starter. I had a similar problem that turned out to be corrosion in the cable you can't see. Tell tale sign is a brittle cable. New cable and the power was normal. Use an amp meter to check the current going to the starter. Good place to start. Link to comment Share on other sites More sharing options...
FunFlatsFishing Posted March 18, 2017 Author Report Share Posted March 18, 2017 That happened to my brother's boat. Ground cable went out and it fried his pulser cord in his engine. Link to comment Share on other sites More sharing options...
HoneyB Posted March 18, 2017 Report Share Posted March 18, 2017 After cleaning and making sure all connections are tight, test the voltage at the starter. My guess , get ready to buy a starter. You may get lucky and find a loose ground. Link to comment Share on other sites More sharing options...
FunFlatsFishing Posted March 18, 2017 Author Report Share Posted March 18, 2017 So I pulled out my multimeter and both cables from the starter motor to the battery switch/ground post had 0 ohms of resistance. They also read 12.8 volts. Does this mean those cables are good or is there more that factors into it? Link to comment Share on other sites More sharing options...
FunFlatsFishing Posted March 19, 2017 Author Report Share Posted March 19, 2017 5 hours ago, FunFlatsFishing said: So I pulled out my multimeter and both cables from the starter motor to the battery switch/ground post had 0 ohms of resistance. They also read 12.8 volts. Does this mean those cables are good or is there more that factors into it? The answer to my above question is - Yes there are other factors. I will be doing a voltage drop test tomorrow. Link to comment Share on other sites More sharing options...
FunFlatsFishing Posted March 19, 2017 Author Report Share Posted March 19, 2017 Boat is fixed. All that testing and it ended up being a loose ground on my house battery. At least I learned how to use my multimeter. Link to comment Share on other sites More sharing options...
HoneyB Posted March 19, 2017 Report Share Posted March 19, 2017 Awesome. Glad you got it figured out. Also Glad to know I am not the only one who still had instructions stored with his multi meter. Link to comment Share on other sites More sharing options...
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