1957 10hp qd-18

[hockeyfann]

the manual said that i should put in sae90 hypriode oil in the gearcase can i use 75w90 if not where can i get regular sae90 hyproide gear oil also is a j6j and a j6c the same plug and is it true that i should use a j4c instead of a j6j?

 

[jbjennings]

Re: 1957 10hp qd-18

You can get marine grade oil at walmart, or any place that sells boating equip. The 75w90 will work fine, but it's best to get the marine grade.
I would use the j4c plug if most of my motoring was high throttle, the j6c if I did lots of low speed motoring. I think champions are going to be j6c and j4c now. Don't get a j8c--too hot. Don't get jc6---lawn mower plug.
Good luck,
JBJ