Trouble shooting table 12 Engine speed variations during operation D Too little fuel in fuel tank D Air in fuel system D Fuel lines leaky D Fuel high-pressure part leaky D Injection nozzles defective, worn D Speed governor defective D Remedy by Bosch Service Engine cannot be stopped D Cut-off linkage bent or jammed D Cut-off solenoid without voltage D Injection pump set incorrectly or defective D Remedy by Bosch Service Performance unsatis- factory, max.
boat speed is not reached D Engine speed adjusting lever not in full-load position D Incrustation of hull, shaft system and propeller with foreign matter D Propeller consumes too much power, nominal speed is not reached D Propeller consumes too much power, engine runs in the breakaway range D Flow of water on to the propeller insuffi- cient D Fuel temperature too high D Unsuitable, contaminated fuel D Fuel filter clogged D Air in fuel system D Lack of fuel D Temperature in engine room too high, combustion air and fuel too hot D Supply of combustion air insufficient, intake vacuum too high D Charge-air pipes leaky D Intercooler contaminated D Turbocharger contaminated or defective D Compression insufficient D Injection pump and / or governor defective D Fuel lines routed near hot en- gine components D See ”Fuels, Lubricants ...” D Check fuel lines and delivery pump D Check inward and outward ven- tilation D Check intake air supply to air filters D Remedy by Bosch Service Coolant temperature too high, coolant loss D Coolant level too low D Air in coolant circuit D Proportion of anti-freeze / anticorrosion agent too high D Raw water supply clogged D Raw water supply insufficient D Cap with working valves on expansion tank defective, leaky D Thermostat in closed position blocked D Heat exchanger heavily contaminated, pipe group coated with foreign matter D V-belt for water pump drive not correctly tensioned (slipping) D Water pump leaky, defective (bearing damage) D Coolant circuit clogged by foreign matter D Thermostat jammed in ”shut” position D See ”Fuels, Lubricants ...” D Check inlet orifice D Impeller worn.
Measure delivery of raw water pump and vacuum at inlet