Onan Generator starting problems (1 Viewer)

[pij974]

Hi everyone, having a few problems with the genny starting. Sometimes it will start straight away, then other times its as if it it turning over too slow, so wont start. where does the genny get its feed from? the leisure batteries or the vehicle battery? Its a C class dutchmen express 7.4 v8. Thanks in advance.
Paul

 

[American Dream]

On Mine it's the vehicle Batteries.

You have got plenty of fuel in the tank haven't you?Had the same problem until I realised....oh:

Mine feeds from approx 1/4 way up the tank to stop the genny using all the fuel and leaving the RV stranded.

 

[pij974]

yes plenty of fuel in tank, it just dosn't seem to turn over quick enough, as if the battery is going flat, but the vehicle starts ok and leisure batteries are good.

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[American Dream]

I guess I'd start by removing and cleaning all the starter terminals etc.

Does it turn over faster with the RV engine running/charging the batteries?

 

[pij974]

Hi, no it dosn't seem to make any difference with the engine running. perhaps i need to start taking it to bits and clean terminals like you suggested.

 

[45eEver]

After it's been slow at starting, check the connections to fins the warm one.

The warm one is the faulty one.

You could have more than 1 faulty one, so if at first you don't suck seed etc.

Remember Geo's advice to have someone with a fire extinguisher watching the wiring when you crank a slow or stuttering starter system.

In case you aren't already aware, H&S also recommend chemical goggles when you play around with batteries.
The sort that stops the acid trickling down your forehead and into your eyes.

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[pij974]

think you may have replied to the wrong post:Sad:

 

[45eEver]

Pij947, it should read: -

"After your genny has been slow at starting, check the connections to finD the warm one.

The warm one is the faulty one. . . "

'Connections' are where cables attach to posts.
2 at the battery.
1 at the earth.
One at the genny's starter motor.
If your genny has a remote solenoid, there are two on that.

There may be others since the cable runs may be long.

If you are adept with a multi-meter, check voltage drop between each connection and post when someone tries to start you genny.

 

[ruffingitsmoothly]

Hi could it be that your leisure batteries are low on power? As those are the ones that usually power the generator starter!

If you have a start auxillary switch try starting with that depressed:thumb:

Regards Pat

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[johng]

hi, my car is very slow to start, and yet the battery is fine..

its the earth lead back from engine to battery in my case (lead and/or terminals)

Worth a check