Do you know if the Tempest filters can be used on an O-300 engine with a Continental oil filter adapter? I think it is the same filter as for the O-200. Any idea what the shipping costs to Texas (zip code 78641) would be? If the shipping is not too outrageous, I'll take the filters.
Henry, if you have the OEM Continental oil filter adapter on your O-300 it should take a CH48110-1 filter so we're out of luck.
I suspect the OEM Continental adapter uses the same filter for the O-200 and 300 but the F&M unit is an after market product and very different than the Continental one.