- Confirm all fitting has been closed properly
- Adjust tappet clearance. Take crankshaft deflection if bearings renewed.
- Open cooling water check for leak (through cylinder head , crankcase)
- Purge the cooling water line ,check pressure. Open warming up line
- Start LO priming pump , check flow , check pressure , purge LO cooler and filter
- Check play of connecting rod and measure clearances
- Engage turning gear and turn few revolution
- All ok , carryput blow through
- Check pressure of bearings
- Check temp of all bearings
- Start engine at reduced speed.
- Check all parameter ( LO pressure , FO pressure, scav pressure , CW pressure, exhaust temp)
- Check for any leakage
- Stop engine and carry out crank case inspection
- Adjust tappet if required
- If all OK run engine in Off load condition and check parameters
- Run engine on partial load and slowly increase load.
1. High cost: Manganese bronze is a costly alloy, making it less economical for large propellers. 2. Low strength-to-weight ratio: Compared to other propeller materials like nickel-aluminum bronze or stainless steel, manganese bronze has a lower strength-to-weight ratio. 3. Susceptible to corrosion: Manganese bronze can corrode in seawater, especially when exposed to high velocities and turbulence. 4. Poor cavitation resistance: Manganese bronze is more prone to cavitation damage than other materials. 5. Difficult to cast and machine: Manganese bronze is challenging to cast and machine, making it less desirable for complex propeller geometries. 6. Limited weldability: Manganese bronze has poor weldability, making repairs and modifications difficult. Nickel-aluminum bronze or stainless steel are commonly used for propellers due to their: - High strength and durability - Excellent corrosion resistance - Good cavitation resistance - Ease of casting and machining - Weldability
nice explaination
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