Page 55 - REPOWER REFERENCE GUIDE (2020)

Propeller Selection

• Demand request by operator 100%
• RPM at 5282, indicating that the engine is underpropped and causing the software to limit the demand and pulling
back on the RPMs

57317
Nonoptimal propping set up, underpropped

• Alpha SS Mirage 19 pitch propeller. Data would indicate the optimum propping of this boat.
• Demand request by control software at 100%
• Demand request by Guardian at 100%
• Trim position percent at 19.35% optimum trim for this boat
• Demand request by operator 100%
• RPM at 5212 running at optimum speed

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Example and the order to set up G3 data for the optimum propping using the parameters shown

Wide‑Open Throttle Propping Without G3 Test
IMPORTANT: To operate the engine at full throttle before the break‑in period is complete, follow this procedure.
1. Place the remote control in neutral, idle speed and start engine.
2. Slowly advance the throttle until the engine reaches 1300 RPM (± 100 RPM).
3. Watch all gauges for normal readings.
4. When the engine reaches normal operating temperature, run the boat up on plane.
5. Advance the engine RPM (in 200 RPM increments) until the engine reaches its maximum rated RPM.

Maximum rated RPM
200 HP 4.5L 4400–4800
250 HP 4.5L 4800–5200
300 HP 6.2L 5000–5400

90-8M0149179 eng NOVEMBER 2018 © 2019 Mercury Marine Page 4B-7