my 240D turned over slow so I turned key off. It continued to try to start for up to a minute even with the key out. Then I smelled wire burning. I noticed the ground cable at the battery post smoking. Any ideas? /forums/images/graemlins/confused.gif
Yanmar 240D smoking wires
- Thread starter maynarga
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RoyJackson
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Remove the cables and clean the terminals, then reconnect and try again.
Keoke
Gold Member
Maynarqa, a high starter draw in amps due to mechanical or elcectrical fault in starter will cause contact washer in solenoid to fuse across the battery and starter contacts in the solenoid.
This would cause the starter to continue running even after you backed off the start position on ign switch. You can try tapping on solenoid case to break this unwanted contact free.
The smoking ground cable may be due to this excess current flowing thru it from the above condition. This especially true if the neg cable is short as compared to the positive cable.
Any cable that is smoking trough out it's length is not suffering from a low amp flow (hi res @ terminals) condition. More likely current flow in cable is beyond cable capacity instead.
Mechanical fault in starter motors causing heavy current draw is usually due to worn end bushings that allow the armature to rub on the field coil shoes while cranking.
Engine mechanical faults (excess friction or hydro lock) can also cause heavy current draw; however, this is rare.
Put a good volt meter across a fully charged battery and note battery voltage while cranking. If it falls below 9.6 volts there is a good chance your starter taking beyond normal amp draw. While doing test keep neg battery clamp loose just in case starter won't turn off so you can break circuit at battery post.
An inductive dc amp meter is best for measuring starter but most don't have one of these.
A poor man's way to get a hint of excess starter draw is to put head lamps on and hit the starter if lamps go down to almost nothing then something (starter) is sucking up a lot of amps. This test assumes a fully charge battery and normal resistances in both the pos and neg legs of the starter circuit.
cheers,
This would cause the starter to continue running even after you backed off the start position on ign switch. You can try tapping on solenoid case to break this unwanted contact free.
The smoking ground cable may be due to this excess current flowing thru it from the above condition. This especially true if the neg cable is short as compared to the positive cable.
Any cable that is smoking trough out it's length is not suffering from a low amp flow (hi res @ terminals) condition. More likely current flow in cable is beyond cable capacity instead.
Mechanical fault in starter motors causing heavy current draw is usually due to worn end bushings that allow the armature to rub on the field coil shoes while cranking.
Engine mechanical faults (excess friction or hydro lock) can also cause heavy current draw; however, this is rare.
Put a good volt meter across a fully charged battery and note battery voltage while cranking. If it falls below 9.6 volts there is a good chance your starter taking beyond normal amp draw. While doing test keep neg battery clamp loose just in case starter won't turn off so you can break circuit at battery post.
An inductive dc amp meter is best for measuring starter but most don't have one of these.
A poor man's way to get a hint of excess starter draw is to put head lamps on and hit the starter if lamps go down to almost nothing then something (starter) is sucking up a lot of amps. This test assumes a fully charge battery and normal resistances in both the pos and neg legs of the starter circuit.
cheers,
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