
Do you have a question about the Onan MDJA and is the answer not in the manual?
Compliance with all applicable local, state, and federal safety codes.
Basic safety rules including fire safety, moving parts, and securing components.
Safety advice for fuel, exhaust, cooling systems, and batteries.
Explains the manual's purpose, scope, and how to use its sections.
Guidance on identifying engine models using the unit's nameplate.
Technical specifications for various engine models, including bore, stroke, and capacities.
Detailed measurements and clearance limits for engine components.
Torque values for assembly and a list of specialized service tools.
A guide to diagnosing and resolving common engine problems by system.
Pre-starting checks, oil, and fuel recommendations for engine service.
Instructions for bleeding fuel, pre-heating, and starting the engine.
Advice on applying load, break-in, and handling engine failures.
Fuel recommendations, system components, and filter system description.
Details on the fuel transfer pump's operation, pressure, and removal.
Procedures for testing nozzle spray patterns, pressure, and making adjustments.
Methods for timing injection pumps and general repair considerations.
Information on Bryce/Kiki fuel systems, pumps, and flow timing procedures.
Diagnosing pump problems and performing nozzle tests.
Procedures for inspecting components and draining the cooling system.
Steps for cleaning, flushing, and filling the cooling system.
Details on heat exchanger, keel, and direct sea water cooling systems.
Information on different water pump types, their identification, and procedures.
Maintenance for hoses, belts, pressure caps, and thermostats.
Overview of the lubrication system and procedures for the oil pump.
Information on the bypass valve and low oil/centrifugal switches.
Purpose, maintenance, and adjustment of the engine governor system.
Introduction to the starting system and basic testing procedures.
Procedures for repairing starter motor components like armature, brushes, and clutch.
Removal, installation, disassembly, and assembly for Prestolite and Mitsubishi starters.
General procedures for disassembling and reassembling the engine.
Adjusting valve clearance, testing compression, and head/valve disassembly.
Procedures for flywheel, gear cover, governor, camshaft, crankshaft, and piston assembly.