welder engine problems

[kkemp]

Hello I have a lincoln dc 225 3as welder with a onan cck-s 797g engine that doesn't start. It is sparking a lot across the points. It did start one time after I changed condensor and touched points with a screwdriver. Thanks

 

[scallywag]

Are the points in good condition and the gap setting correct?

 

[kkemp]

The points are not excellent but I've started engines with worse gap is set at 0.20

 

[scallywag]

Good spark at the plugs, cylinder compression good, getting fuel to the cylinders?......Tried squirting some fuel in the carb?

 

[kkemp]

Spark is weak and intermittent .great compression and and it has gas at the plugs it ran for about 5 minutes an then the complete points box was sparking

 

[scallywag]

The new condenser is the correct one for the engine?... I'd try another condenser, sounds like this one is discharging through its housing.

 

[kkemp]

It isn't the correct condensor just what I had on hand . It's for a kt 17 kohler . Didn't figure there would be a lot of difference in them

 

[scallywag]

Condensers are rated in 'values', you will need one with the correct 'value', from memory the readings are in micro- fardes ?....Or something like that?

Condensers will and do break down internally through heat, vibration and time, causing discharge through the housing.... An old one can run ok for a few minuets until it warms up.

 

[scallywag]

.........Microfarads.

 

[kkemp]

Ok. Any ideas one where I could find a parts list for it ?the old condensor is old and I can't read the numbers on it .

 

[scallywag]

It would appear there's at least two different sets of points and condensers used in these engines, the change came at a certain engine serial number.

If you google search Onan cck-s 797g, you should find a owner/operators manual on PDF file.

Ignition sets (points & condenser) can be found on Ebay US.

 

[scallywag]

.......And.... Onanparts.com have condensers in stock.

 

[kkemp]

I'm not having any luck on the manual can't find one that specifically says for a cck-s797g

 

[backhoelover]

@scallywag that is some awesome info. learn something new everyday

 

[scallywag]

I'm not having any luck on the manual can't find one that specifically says for a cck-s797g

Let me know the serial number of you engine.

 

[kkemp]

Let me know the serial number of you engine.

It is 56c889615

 

[scallywag]

Is this ignition set similar to yours?....In particular the mounting bracket on the condenser?

This condenser part number, 312-0246.

 

[kkemp]

No its not. The condensor bracket is turned the wrong way

 

[scallywag]

Complete kit for Onan with two screw cover plate ignition box, as per yours........Around $ 35- on ebay.

Note the part number.

 

[kkemp]

Thanks . I ordered that and I'll see what happens when it arrives