140 Johnson stalled

[nlupike]

I have a 1985 140. Recently I went out and the motor killed on me after two hours of running. I was going about 30MPH when this occurred. I tried to restart but it seemed like my battery was dead. Just a note, the cables to the battery were real warm and the fly was was hot. I went home and bought a new battery but the same problem. The solonoid does lift up. The problem is it turns over very slowly and sounds like the battery is dead. Is my starter bad? I heard something about a charging system. Could it be this(whatever the charging system is). Please give me some advise. I have no idea what is wrong. It was just rebuilt last year but is out of warranty. Thanks for any suggestions

 

[wilde1j]

Re: 140 Johnson stalled

Are all terminations clean AND tight (both (+) and (-))?<br /><br />How did motor start before stopage? Sluggish cranking? Normal?<br /><br />You can bypass solenoid with a auto jumper cable from battery (+) to starter (+). Does it crank normally or not? If it does, you've got a problem w/ the solenoid or keyswitch.<br /><br />When you get motor running, you can check charging by measuring across battery terminals with a VOM. Should get ~ 14.5 VDC if charging circuit is working. Alternator consists of two main elements: stator (under flywheel) and voltage regulator/rectifier on top rear of engine.<br /><br />Stator can be checked not running for continuity w/ a VOM. I think it should read ~ 0.2 ohm across the yellow leads. A shop manual will have the detail. There is also a running voltage check. I don't recall the AV volts for that. Both the rectifier and stator are expensive parts, so you want to be sure before replacing.<br /><br />If you don't already have one, you need a shop manual if you want to do your own work.

 

[nlupike]

Re: 140 Johnson stalled

Thanks for the reply. I cleaned off all the connectors and made sure they were tight. I got a little more power but not much at all. <br />As for a the jumper cable thing you suggested, I just put the +(battery) to the +(of starter)? Do I turn the key on or will it start by that. Do I need to ground the - of the jumper cable somewhere.Thanks for the help. After I try this I will let you know what I get.

 

[nlupike]

Re: 140 Johnson stalled

By the way. The motor started fine when we went out. It was idled low but fine. The second time we started it started after two tries.

 

[wilde1j]

Re: 140 Johnson stalled

(+) to (+) jumper will crank immediately. Will try to start if ign key is "ON", won't if "OFF". Negative jumper not needed (unless you don't have a good engine gnd, but you checked this already, right?

 

[nlupike]

Re: 140 Johnson stalled

I jumped the starter but it did not spin real fast. All it did was spark and turn slowly. Should I take the starter off and check it that way? What should the VOM read on the starter and solenoid? Thanks for the continued help.

 

[wilde1j]

Re: 140 Johnson stalled

If you have worker on elec motors and/or starter before, I would be inclined to check the brushes and commutator. Otherwise, have an elec motor shop check it out.<br /><br />You may need a new/rebuilt starter, worst case.