Mitsubishi Bosch Z type Engine

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• Starter will not crank engine or cranks slowly, resulting in a failure of engine to start
  Cause: Battery-starter switch circuit open Starter, starter relay defective
  Fix: Repair or replace Repair or replace
• Starter will not crank engine
  Cause: Air pressure low, Starter switch defective, Magnetic valve defective
  Fix: Run air compressor to increase air pressure. Repair or replace. Consult Mitsubishi dealer. Repair or replace.
• Starter will crank engine, but engine will not start
  Cause: Fuel tank Empty it Fuel leaks from pipe connection
  Fix: Refuel with correct type of fuel Consult Mitsubishi dealer
• Low oil pressure (Oil pressure alarm lamp glows)
  Cause: Lack of oil, Oil viscosity too low, Oil filter clogged, Oil pump defective, Oil pressure regulating valve defective
  Fix: Refill up to level. Refill with correct viscosity of oil. Replace element. *Readjust or replace. *Readjust or replace.
• High oil consumption
  Cause: Too high oil level in crankcase, Incorrect grade of oil, O} leaks, Cylinders and piston rings worn
  Fix: Maintain oil level between marks on gauge. Use recommended type and SAE number of oil. Locate and repair. *Replace.
• High fuel consumption
  Cause: Fuel Tank Injection pump defective, Injection nozzles defective, Injection timing incorrect, Wrong type of fuel, Compression pressure low, Insufficient air (air cleaner clogged)
  Fix: *Readjust or replace. *Readjust or replace. *Retime. Refill with correct type of fuel. *Overhaul. Clean or change element. Check turbocharger.
• Engine will not crank
  Cause: Air pressure low
  Fix: Run air compressor to increase air pressure
• Engine overheats
  Cause: Fan belt loose, Lack of coolant, Too low oil level, Water pump defective, Thermostat defective
  Fix: Readjust. Refill. Maintain oil level between marks on gauge. *Replace. *Replace.
• Engine lacks power
  Cause: Incorrect grade of oil, Wrong type of fuel, Air cleaner clogged, Engine overcooled, Engine overheating, Valve clearance incorrect, Injection pump defective, Injection nozzles defective, Injection timing incorrect, Poor compression pressure (due to worn cylinders and pistons)
  Fix: Use recommended type and SAE number of oil. Change. Clean or change element. Use radiator cover, or clean, test and replace thermostat. Check coolant level, adding water if necessary. Readjust. *Readjust or replace. *Readjust or replace. *Retime. *Overhaul.

Compiled from service & troubleshooting documentation across every generator set that uses the Mitsubishi Bosch Z type.