154373-1420 ZEXEL 9 421 617 701 BOSCH BRACKET 9421617701 1543731420

For all marine transmission lubrication and maintenance activities, refer to your marine transmission or vessel OEM literature.Use fuel consumption, service hours, or calendar time, whichever occurs first, to determine maintenance intervals. Experience has shown that maintenance intervals are most accurately scheduled on the basis of fuel consumed rather than service hours.Daily
Walk-Around Inspection - Inspect engine for leaks and loose connections Engine Crankcase - Check oil level Cooling System - Check coolant level Air Cleaner - Check service indicator/Service air cleaner when needed Air Starter (If Equipped) - Check lubricator oil level Clutch (If Equipped) - Check/Adjust/Lubricate Marine Transmission - Check oil levelEvery 2550 L (675 gal) of Fuel or 50 Hours
Zinc Rods - Inspect/ReplaceFirst 12,750 L (3375 gal) of Fuel or 250 Hours
1 Valve Lash - Check/Adjust (at the first oil change interval)Every 12,750 L (3375 gal) of Fuel or 250 Hours or Yearly
1 Scheduled Oil Sampling (S O S) - Obtain Sample and analysis1 Engine Crankcase - Replace oil and filter(s)1 Crankcase Breathers - Clean Fuel System - Clean primary fuel filter (if equipped)/Replace final fuel filter Fuel Tank - Drain water and sediment Cooling System (Conventional HD Coolant Only) - Test for SCA concentration OR obtain Level I coolant analysis/Add SCA if necessary Air Cleaner - Clean/Replace air filter elements Belts - Check/Adjust/Replace Hoses and Clamps - Inspect/Replace Batteries - Clean/Check (if required)Every 51,000 L (13,500 gal) Of Fuel Or 1000 Hours
Engine Protection Devices - Inspect/Check Magnetic Pickup - Inspect/AdjustEvery 153,500 L (40,500 gal) Of Fuel Or 3000 Hours
Water Temperature Regulators (Thermostats) - Replace Cooling System (Extended Life Coolant Only) - Add Extender2 Cooling System (Conventional HD Coolant Only) - Drain/Clean/Replace coolant Engine Mounts - Inspect Crankshaft Vibration Damper - Inspect Valve Lash, Valve Rotators - Check/Adjust Fuel Ratio Control, Set Point, and Low Idle - Check/Adjust PAR Analysis - ObtainEvery 256,000 L (67,500 gal) Of Fuel Or 5000 Hours
Fuel Injection Nozzles - Test/Exchange Jacket Water Pump - Inspect/Rebuild or Exchange Raw/Sea Water Pump - Inspect/Rebuild or Exchange Alternator - Inspect/Rebuild or Exchange Starting Motor - Inspect/Rebuild or Exchange Air Compressor (If Equipped) - Inspect/Rebuild or Exchange Turbocharger - Clean/Inspect/CheckEvery 6000 Hours Or Four Years
Cooling System (Extended Life Coolant Only) - Drain/Flush/Replace CoolantOverhaul
Overhaul Considerations13408 Marine Engines that are equipped with the deep oil sump [87 L (92 qt)] may perform this maintenance after 25,500 L (6750 gal) of fuel or 500 Hours.2If a commercial HD coolant/antifreeze meeting ASTM D4985 specifications is used, or if a mixture of commercial SCA and water is used, this maintenance should be performed at a maximum of One Year.