The Plugs in my friends D are D-21 Champions. They had Anti Fouling caps installed on them. He is going to pick up new plugs this evening. What would the best plug be for this machine? I was reading online that D-21s were a hotter plug.
I see D-21 cross's to Autolite 386
What did they come with. I looked at the parts book and it has a case number I can't cross reference.
Also,
What compression should we expect from a good engine. We are seeing 110 lbs on every cylinder.
Thanks
I see D-21 cross's to Autolite 386
What did they come with. I looked at the parts book and it has a case number I can't cross reference.
Also,
What compression should we expect from a good engine. We are seeing 110 lbs on every cylinder.
Thanks