[AnthonyG]

J & 51Merc-CT, here’s what I’m understanding. I’ll plan to install the spin on filter base w unfiltered oil coming from upper oil pressure port as is w no mod & use existing npt threaded hole. Filtered oil to be directed thru side of of oil pan w 90 degree fitting directing oil toward bottom of pan. To install restriction to maintain good oil pressure to engine I’m thinking the fitting size where the oil is going into the oil pan would be 1/4” ID feeding from filtered oil side & unfiltered oil from oil pressure port @ 1/8”ID? That should cause restriction that’d keep pressure up enough in the engine?