W9

[henry v11]

Iam still trying to find the correct # Champion spark pluf for my 1948 W9. ANy one have any ideas.
Thank you

 

[Owen Aaland]

I did not come up with a listing from Champion but AC Delco lists C73 as the correct plug. That crosses to a Champion W10. You can use a W14 for light duty or if necessary to keep from fouling, a W18 for parade duty.

 

[Jeff Z.]

What plugs are in it now?

 

[glennster]

here is a link to autolite spark plug application for all kinds of machines. the w-9 will take an autolite 3076.
spark plugs

 

[Jeff Z.]

I have also found the Autolite #3076 listed for the W9 on Steiner's site.
I crossed the Autolite number to Champion and it came back a W10 W14 W18 and W20

 

[Jeff Z.]

The Autolite #3076 also crossed back to Champion 429 518 and C16C ??????
I would go with Champion numbers Owen posted.

 

[rustred]

simple,take an old plug with you to napa or whoever , from there they will give you the correct plug. there is two tread sizes as the early tractors had the big plugs which are the W series, or it can be the D series in the champion line.if they know their plugs i am sure there is no problem to get the size and heat range you want.you say its 1948 so i am sure its the same ones as in the M and W6 which is the D16 , and from there select your heat range for the tractor usage.