Briggs 17.5 opposed twin will not restart when hot 42A707

troy-built

Well-Known Member
Joined
Sep 15, 2020
Threads
6
Messages
120
  • / Briggs 17.5 opposed twin will not restart when hot 42A707
These coils are very sensitive to both the spark plug and the plug gap .
What plugs are you using ?
I don't have the number in front of me but I know it's a champion plug. I will look tomorrow. I will say one thing I regaped the plugs today after reading over the manual, they were to wide and it seemed to run better.
 

Scrubcadet10

Moderator
Staff member
Joined
Sep 24, 2017
Threads
267
Messages
6,640
  • / Briggs 17.5 opposed twin will not restart when hot 42A707
Probably won't matter, if you get/order the 394891, most likely you will receive the 590781.
 

troy-built

Well-Known Member
Joined
Sep 15, 2020
Threads
6
Messages
120
  • / Briggs 17.5 opposed twin will not restart when hot 42A707
Probably won't matter, if you get/order the 394891, most likely you will receive the 590781.
I have found a few NOS 394891 in the original B&S boxes. The new style 590781s are a good bit cheaper and seem to be all made in china. That's where the bad one I have now that I bought was made. Most of the time you get what you pay for I guess.

Thanks again for your help.
 

matt man

Member
Joined
Sep 3, 2013
Threads
1
Messages
19
  • / Briggs 17.5 opposed twin will not restart when hot 42A707
I have same. This is the second ignition coil that I have put on it.
 

troy-built

Well-Known Member
Joined
Sep 15, 2020
Threads
6
Messages
120
  • / Briggs 17.5 opposed twin will not restart when hot 42A707
I have same. This is the second ignition coil that I have put on it.
I hope this next one last as long as the first one did. LOL
 
Top