Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 251Get this manual
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12 Tighten connecting rod bolts (using 516 in- 12 point socket) First torque to 15 lbin(1.5 Nm) then 30 lbft(40.5 Nm)Turn each bolt an additional 90 after 2nd torque is attainedRecheck alignment betwe