Mercury 540 Bravo - Specifications: Engine Operating Limits and Break-in; Engine Operating Limitations; Engine Break-in Procedure

Engine Operating Limitations
Maximum wide‑open throttle (WOT) RPM 5000–5400 RPM
Rev limit
1.
5600 RPM
Idle RPM in gear 700 RPM
Idle RPM out of gear 800 RPM
Maximum fuel system flow rate
155 L/hr (41 gals/hr) at 5200
RPM
Fuel pressure at idle 300 kPa (43.5 psi)
Fuel pressure at wide‑open throttle 270 kPa (39.2 psi)
Coolant thermostat initially opens at: 62° C (143° F)
Coolant thermostat is wide open at: 70° C (158° F)
Minimum water pressure supplied to the
engine at WOT
172 kPa (25 psi)
Maximum water pressure supplied to the
engine at WOT
345 kPa (50 psi)
Minimum oil pressure at idle (hot) 138–207 kPa (20–30 psi)
Minimum oil pressure at WOT (hot) 331–379 kPa (48–55 psi)
a - Front of engine and boat
b - Firing order 1‑8‑4‑3‑6‑5‑7‑2
Engine Break‑in
IMPORTANT: Failure to follow the engine break‑in procedures can result in
poor performance throughout the life of the engine and can cause engine
damage. Always follow break‑in procedures.
1
2
3
4
5
6
7
8
6985
a
b
b
1. Engines are equipped with an ignition system that has a built‑in 5600 RPM rev limiter. Engine is performing
normally if it will not exceed this RPM.
SPECIFICATIONS
28 eng