Re: 1939 Sea King / Thor barrel test

[Buccaneer]

Joe, thanks for the link. I see the heat range of "5" under the specs,
but if "5" is in the middle of the heat range, then their cross reference
to Champion D18Y (549) shows a heat range of "18"…….. not sure
what’s up with that!

quote joesnuffy:

I looked up the autolite 3116 heat range and it was a 5 . That should be middle of the road heat range I would think combine that with the cold water you were using I would think the motor would have ran cooler on the rear of cylinder. I can’t help but wonder if their is a restriction of flow of water or if it might pump more when mounted on an actual boat. Just a thinking out load.
https://www.sparkplugs.com/product.aspx?zpid=7748
When I have used hotter spark plugs they normally get pretty hot to the touch of the base of them fairly quickly like 1 minute I can tell when their a hot plug using my finger on the base of plug. Sometimes it also lets me know when a plug isn’t firing as it should after like a minute or 2 I feel the plug bases to see how they compare to one-another.
Joe

Prepare to be boarded!