Gemini 105Mc Owner’s Manual
59
Copyright © 2004 Performance Cruising Inc.
intervals without the engine starting can result in fill-
ing the engine mounted exhaust system with sea water
coolant. This may happen because the sea water pump
is pumping sea water through the cooling system dur-
ing cranking. With prolonged cranking of the engine,
the sea water can enter the engine cylinders by way of
the exhaust manifold once the exhaust system fills.
To prevent this from happening, close the sea cock
valve supplying sea water while attempting to crank
the engine. Once you have corrected the problem and
the engine starts, stop the engine and open the sea
water seacock to allow the flow of sea water to the
engine.
Scheduled Maintenance
Daily (Before Use) Check
1. Oil sump level
2. Coolant
level
3. Fuel supply
4. Primary fuel filter/water separator
5. Panel gauges operation (indicating lights, alarms)
6. Transmission fluid level
7. Loose belts, clamps, fittings, wires
Monthly
1. Check zinc anode in heat exchanger
After 50 Hours Initial Operation
1. Change engine lube oil & filter
2. Replace fuel filter elements
3. Torque cylinder head bolts **
4. Adjust valve clearances **
5. Adjust drive belts
6. Check electrical connections
7. Lubricate control cables
8. Change transmission fluid
9. Check idle speed **
After Every 100 Hours
1. Change engine lube oil & filter
2. Adjust drive belts
3. After Every 250 Hours
4. Replace engine fuel filter(s)
5. Check siphon break operation (if installed)
After Every 500 Hours
1. Torque cylinder head bolts **
2. Adjust valve clearances **
3. Drain, flush, refill fresh water coolant
4. Check starter motor drive, lubricate pinion **
5. Check glow plugs
6. Check water injected exhaust elbow condition **
7. Check raw water pump impeller & connections
8. Check Hurth transmission cooler
After Every 800 Hours
1. Remove and check fuel injectors **
2. Check compression pressure **
After Every 1,000 Hours
1. Remove & clean heat exchanger
2. Remove & clean hydraulic transmission cooler
** Should be done by competent mechanic. Refer to
Operator's Manual.
Westerbeke Engine 30B Quick Notes
