Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 369Get this manual
MANUAL TILT ASSIST
4During up stroke, pull up on rod slowly in(76 mm) from base5Wait until ali air bubbles to exit accumulator base
6Slowly cycle unit 5-8 times (round trip per cycle) using short strokes in(76 mm) from base allowing bubbles to disappear during each stroke 7Allow unit to stand five minutes, then proceed to cycle unit 2-3 more times using short strokesNo air bubbles should appear from accumulator port at this time8With oil level well above accumulator port, slowly pull rod to full up position9Install accumulator making su re air bubbles do not enter system10Tighten accumulator snugly at this time