Two major issues with relo kits. Always deburr and round off any and all inside sharp edges, they restrict the oil flow. NOW THE BIGGIE!!!! If you install the lines backwards, the anti drainback valve inside the filter (not all filters have them, just the premium and race ones) will not allow oil to flow backwards! It will initially hydraulic the system, then tear some of the rubber drainback valve enough for you to see oil pressure at low rpms, but that will restrict the flow at higher rpms. We built a very nice 8-71 blown 540 a few years ago and the customer's neighbor owned a boat stereo shop. He said they would install it cheaply. They incorrectly installed the lines and the motor expired in about 15 minutes of running at the lake. We also had another one in here about a year and a half ago too. That one lasted for 3 miles out of the 5 mph zone... The oil is supposed to flow into the outside of the filter through the dozen or so small holes, and exit through the big center hole. Had a customer buy a boat last summer that was incorrectly plumbed when he purchased it, it lasted until my customer changed the oil and put in a premium HP filter. The race filter had the anti drainback valve and the cheap ones the old owner used didn't. If you are not SURE if yours is correct, remove the filter, disconnect the coil wire,(let it spark against the head or block so it doesn't hurt the coil) crank the engine and verify that the oil comes out of the filter mount on the outside of the filter and re-enters through the center hole. TIMINATOR
