3w 140 engine problem
 

Hi Guys hope someone can help here, i have a 3w140 that is difficult to start, the carb is clean and fine but it will only run on one cylinder at a time sometimes both together, then hops from one to the other the batt pack for the ign is 4.8v 1700ma, i have a feeling its the ignition pack has any of you out there had simalar problems with twins,

RE: 3w 140 engine problem
 

Hi,

I would suggest that it is the ignition. Usually, it is the spark plug caps which go bad and need replacing.

Elson

RE: 3w 140 engine problem
 

thanks for that mate , looks like i need a replacement,The unit is stamped 1996, so 12 yrs old (but maybe not 12 yrs use)

RE: 3w 140 engine problem
 

Hi,

Try replacing the spark plug caps before you give up on the ignition. They are usually the component which goes bad.

Elson