[Guest]

What causes a sled to go through spark plugs. Been running the sled now for a month and 2 new plugs are good for about 3 days . Plugs are not fouled still look almost new . Put in 2 more and continue for 3-4 days start all over . I am running NGKs 7BS Started with 8BS NGKs . Any ideas??????

 

[mach2_nh]

Hmm.. no clue. but i run NGK 8BS on my 399 all is good here.
I have had them die on me. i keep some with me now.