09 fat bob won’t start any help?
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6th Gear
Joined: Apr 2020
Posts: 10
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From: Alabama
09 fat bob won’t start any help?
Hi, I have an 09 fat bob hasn’t run in like 5 years recently took the fuel tank off and got rid of the rust in it. Just put a new battery and gas in it today but it still won’t start.
Thread Starter
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6th Gear
Joined: Apr 2020
Posts: 10
Likes: 0
From: Alabama
My bad thought a video posted with it anyway it cranks slowly almost like the battery’s dead I think it’s the starter motor, but I’m not sure. It sounds like it doesn’t have enough power to start it. I’ve tried 3 different brand new batteries and none have worked.
Seasoned HDF Member
Joined: Jul 2008
Posts: 9,282
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From: southeast PA
Sure sounds like a weak battery. I can't imagine that all 3 batteries weren't strong enough but unless they were fully charged and tested I would make sure. Just because it's new doesn't mean it comes with a full charge. Also, pay attention to the battery connections at the battery and also the ground. The terminals at the battery have to be flush up against the posts and the ground cable has to be clean and tight.
Seasoned HDF Member
Joined: May 2008
Posts: 21,174
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From: South Carolina
Starter motors very seldom go bad, but people love to buy them before doing any troubleshooting.
When a starter motor cranks slowly, it is usually an indication of insufficient amperage getting to the starter.
This can be caused by a bad or weak battery, poor connection at battery cables, or a poor ground.
Remember, the current must have a clean and complete path, from the positive terminal, all the way back to the negative terminal.
The bike has been sitting 5 years, assume all electrical connections need cleaning...
Remove the cables, and clean all connection points.
Make sure the battery has a full charge.
When a starter motor cranks slowly, it is usually an indication of insufficient amperage getting to the starter.
This can be caused by a bad or weak battery, poor connection at battery cables, or a poor ground.
Remember, the current must have a clean and complete path, from the positive terminal, all the way back to the negative terminal.
The bike has been sitting 5 years, assume all electrical connections need cleaning...
Remove the cables, and clean all connection points.
Make sure the battery has a full charge.
Thread Starter
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6th Gear
Joined: Apr 2020
Posts: 10
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From: Alabama
Ok so the engine doesn’t have any spark and the fuel pump doesn’t prime. The spark plugs looked good but there’s no power getting to them and we couldn’t find any bad connectors or tears. I think I’m going to replace the wires to the fuel pump and the spark plugs and see if that gets me anywhere. Any other suggestions? Thanks for the help.
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Seasoned HDF Member
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From: Granville New York
Check fuses before you start replacing wiring. Much easier. Use a multi meter dont just use your eyeball
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Ok so the engine doesn’t have any spark and the fuel pump doesn’t prime. The spark plugs looked good but there’s no power getting to them and we couldn’t find any bad connectors or tears. I think I’m going to replace the wires to the fuel pump and the spark plugs and see if that gets me anywhere. Any other suggestions? Thanks for the help.
So many possibilities - the pump/lines are junk and the fuse is blown, if you checked for spark with the plugs out, you won't see any, crank sensor went south or any combination of the previous plus more. You said you took the tank off and got rid of rust. What did you do with pump, filter, regulator and lines?
Gas in a tank for 5 years, I can guarantee you need to check fuses and pump to start. Injectors are also probably clogged.
As previously noted, check battery cables on both ends. Was the new battery fully charged, or did you just put it in? What was the voltage on the battery at install?
Last edited by Ed Ramberger; Apr 19, 2020 at 09:26 PM.
HDF Community Team
Joined: Jun 2006
Posts: 12,776
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From: san antonio
I would advise stop guessing and obtain a factory service manual. I can pretty much guarantee that replacing wires to the fuel pump and spark plugs will do nothing to help. The guess and replace approach is going to cost you time and money.
So many possibilities - the pump/lines are junk and the fuse is blown, if you checked for spark with the plugs out, you won't see any, crank sensor went south or any combination of the previous plus more. You said you took the tank off and got rid of rust. What did you do with pump, filter, regulator and lines?
Gas in a tank for 5 years, I can guarantee you need to check fuses and pump to start. Injectors are also probably clogged.
As previously noted, check battery cables on both ends. Was the new battery fully charged, or did you just put it in? What was the voltage on the battery at install?
So many possibilities - the pump/lines are junk and the fuse is blown, if you checked for spark with the plugs out, you won't see any, crank sensor went south or any combination of the previous plus more. You said you took the tank off and got rid of rust. What did you do with pump, filter, regulator and lines?
Gas in a tank for 5 years, I can guarantee you need to check fuses and pump to start. Injectors are also probably clogged.
As previously noted, check battery cables on both ends. Was the new battery fully charged, or did you just put it in? What was the voltage on the battery at install?
