Another 'won't start'

[Slow_boat]

Another \'won\'t start\'

I have a Bukh 20. When I turn the key the starter dog engages on the flywheel but that is all that happens. It doesn't even try to turn the engine.

The battery is new and fully charged.

Oh, and should the batteries be wired with positive on one going to negative on the other?

Ta

 

[2Tizwoz]

Re: Another \'won\'t start\'

The common problems and how to deal with them are listed here

 

[Thistle]

Re: Another \'won\'t start\'

[ QUOTE ]
Oh, and should the batteries be wired with positive on one going to negative on the other?


[/ QUOTE ]
Only if you have a 24V system. On a 12V system batteries should be joined in parallel (ie +ve to +ve and -ve to -ve).

 

[Eeyore]

Re: Another \'won\'t start\'

Solenoid is working, starter motor isn't.
Try the simple thing first and tap the motor with a hammer - it may be that the brushes are not making contact with the commutator.

 

[lenseman]

Re: Another \'won\'t start\'

[ QUOTE ]
I have a Bukh 20. When I turn the key the starter dog engages on the flywheel but that is all that happens. It doesn't even try to turn the engine.

[/ QUOTE ]
Although the batteries are fully charged, it could be that you have a high resistance (HR) within the starting wiring circuit such that immediately you press the starter button, the HR kicks in and there is only enough current to allow the starter to engage the flywheel. Look for dirty cable joints with corrosion or loose cable connections.

[ QUOTE ]
Oh, and should the batteries be wired with positive on one going to negative on the other?

[/ QUOTE ]
I presume you are talking about standard 12 volts car type batteries? If so, it depends whether you require them to supply voltage for a 12 volt system or a 24 volt system?

I presume you are talking of only two car type batteries? If they are for a 24 volt system, then wiring them in series is correct, connecting them Positive to Negative would be correct and the feed would be taken, one from the free positive and the other lead from the free negative terminal of the two batteries.

If for a 12 volt system then wiring them in parallel is correct where you connect positive to positive and negative to negative and you take your required feeds, one from the negative lead and the other from the positive lead.

 

[Richard10002]

Re: Another \'won\'t start\'

[ QUOTE ]
I have a Bukh 20. When I turn the key the starter dog engages on the flywheel but that is all that happens. It doesn't even try to turn the engine.

The battery is new and fully charged.

Oh, and should the batteries be wired with positive on one going to negative on the other?

Ta

[/ QUOTE ]

I had exactly the same symptoms a week or so ago, but it turned out my battery was old and knackered. A new battery did the trick.

You need to tell us how your batteries are actually connected, and whether you have a 12v or 24v system.

Can you switch terminals from one battery to the other, (if it's a 12v system), just to make sure it isnt the battery - I got a start off my domestic bank, which was confirmation enough.

Are they both showing close to 13v, (with the charger off /forums/images/graemlins/smile.gif ) My engine starter showed 12.2v whereas the domestic bank showed 13v .... both "fully charged"

It sounds electrical, (always was when my cars wouldnt start as a student - many years ago).

Richard

 

[VicS]

Re: Another \'won\'t start\'

[ QUOTE ]
should the batteries be wired with positive on one going to negative on the other

[/ QUOTE ] A picture is worth a thousand words

 

[Slow_boat]

Re: Another \'won\'t start\'

Just as well I've only connected one battery up. I would have had 24v in my 12v system otherwise!

The engine start battery is brand new and I charged it for 24hrs just to make sure.

 

[Richard10002]

Re: Another \'won\'t start\'

Make sure you've got 13v, (or close), and try the other battery are the simplest options. Then I guess it's connections, then it might be taking the starter apart,(which might need external help /forums/images/graemlins/smile.gif )

 

[MoodySabre]

Re: Another \'won\'t start\'

Duncan - when mine would start it was a poor connection (in my case on the solenoid but it could be anywhere). This causes high resistance and therefore a huge drop-off of amps at the starter. It's amps that make it kick. Remake all the connections - shiny terminals and clamps (put on Vaseline on whatever on after they are done up). If that doesn't solve then it's starter out time.

 

[tt65]

Re: Another \'won\'t start\'

This happened to me with a Bukh 20. This was years but it was a totally seized engine. Finished with a new DV24 and many quid lighter.

 

[VicS]

Re: Another \'won\'t start\'

When checking connections dont forget the negative ones as well including the connection via the engine block to the starter motor.

 

[Bilgediver]

Re: Another \'won\'t start\'

Do you have a pre engage starter???? IE the solonoid is mounted on top of the starter with a crank lever to the pinion...

If this is the case there is a good chance the starter contacts in the solonoid are knackered....

Sometimes they can be cleaned up and will last a while...

 

[Slow_boat]

Re: Another \'won\'t start\'

I'm not sure of where the soleniod is; I'll have a look.

 

[misterg]

Re: Another \'won\'t start\'

Can you turn the engine by hand? If not, it's likely a mechanical problem, rather than an electrical one.

Andy

 

[Slow_boat]

Re: Another \'won\'t start\'

[ QUOTE ]
Can you turn the engine by hand? If not, it's likely a mechanical problem, rather than an electrical one.

Andy

[/ QUOTE ]

I haven't tried. No starting handle anyway!

 

[misterg]

Re: Another \'won\'t start\'

[ QUOTE ]
[ QUOTE ]
Can you turn the engine by hand? If not, it's likely a mechanical problem, rather than an electrical one.

Andy

[/ QUOTE ]

I haven't tried. No starting handle anyway!

[/ QUOTE ]

Starting handle /forums/images/graemlins/grin.gif? Don't these have a dirty great big exposed flywheel at the front? or am I thinking of the wrong engine?

If possible, you should try and move the engine by hand, even if only a small amount, just to verify that it's mechanically OK, and not gummed up after being stood. It will greatly influence the route you take to resolve the problem /forums/images/graemlins/smile.gif

Andy

 

[Slow_boat]

Re: Another \'won\'t start\'

Yep, dirty great big flywheel out front.

I don't think there is anything wrong that end, it had a fair bit of work when I bought it last year and there were no strange noises last time it ran.

I'll check anyway.

 

[Moonshiners]

Re: Another \'won\'t start\'

Tap tap taperoo on the starter, while engaging the ignition, as long as the engine turns free.


Didn't you ever wonder what VW camper owners were doing on the hard shoulder hidden under the engine bay with there legs sticking out in to the 1st lane...

If you get it to turn while tapping you know it's your starter even if you don't get it to.... start!

 

[vyv_cox]

Re: Another \'won\'t start\'

<<< Didn't you ever wonder what VW camper owners were doing on the hard shoulder hidden under the engine bay with there legs sticking out in to the 1st lane... >>>

You must have seen me! Actually, I was shorting out the solenoid and main battery leads with a screwdriver. Always happened in the rain. In the end I ran an extra lead from the solenoid connection into the engine compartment and touched it on the battery when the thing refused to turn over.