How many compression rings in marine engines normally have?

What are key failure areas in engines pushing 10-11k rpms?

• with a 4 cylinder engine with very large pistons & a 2.05:1 rod/stroke ratio-all billet machined parts, what are the key areas of failure that need addressed (pistons, piston head shape, valves, valve springs, flow, tune, compression, combustion chamber shape, crankshaft, connecting rods, bearings, piston rings, cylinder sleeves, & oiling system). i figure the biggest problems (after oiling system, crank connecting rods, & pistons) is the wrist pins-if so, what are the best things to do to strengthen the wrist pins?

• Answer:

  the valvetrain would need to be upgraded with stiffer springs to prevent valve float (very bad) and the wrist pin should have no problem as they are made very strong usualy never give out.i would wory about bearings as they take much of the load