plug referent

[dustinatdana]

I have seen spark plug referent to which goes to my motor. There are 4 all champion a rj8c, j8c, j6c and j4c . I have a Johnson 1963 40 hp model rk-25d All the links I used wear from hear.Wich one is the best? Thanks Dustin

 

[JB]

Re: plug referent

Howdy, Dustin.<br /><br />I agree with Middleground. J4C or RJ4C.<br /><br />However, if you do a lot of low speed operation. . .trolling, etc, the J6C would do a good job of minimizing fouling.<br /><br />Good luck.