106675-4850 ZEXEL 9 400 617 422 BOSCH INJECTION-PUMP ASSEMBLY 9400617422 1066754850 6152721590

Crankshaft Turns Free Exhaust Smoke Can Be Seen While Starting
Cold Outside Temperatures ... It may be necessary to use starting aids, or warm engine oil or coolant, at temperatures below 10°F (-12°C).Air in Fuel System ... See PRIMING THE FUEL SYSTEM.Low Quality Fuel ... Drain a small amount of fuel from the tank and check for water in the fuel. If there is water in the fuel, drain the tank and fill with a good quality fuel. Change the fuel filter and "prime". If there is no water in the fuel, using an outside supply of fuel, prime and start the engine. If engine starts correctly using different fuel, remove all fuel from the tank and fill with good quality fuel and prime the fuel system.Fuel Injection Timing Not Correct. *Valve Adjustment Not Correct ... Check and make necessary adjustment. See VALVE LASH ADJUSTMENT.Defective Fuel Nozzle(s) ... Replace the fuel nozzles.Low Compression ... See the topic MISFIRING AND RUNNING ROUGH.Exhaust Smoke Cannot Be Seen While Starting
No Fuel in Tank ... Check fuel level visually (do not use the fuel gauge only). Be sure tank selection valve is open to the tank with fuel in it. Be sure valve in fuel line between the tanks is open.No Fuel From Fuel Injection Pump ... Loosen one or more of the fuel injection line nuts at the cylinder heads. With ignition switch on and accelerator in the fuel on position, turn the engine with the starter to be sure there is no fuel from the fuel injection pump. To find the cause for no fuel, see the following information.Prime fuel system.Check solenoid by turning on ignition switch. You must hear a sound when the plunger opens. If no sound is heard, make sure there is battery voltage at the solenoid and that the voltage is no less than 8 volts (terminal voltage while cranking). If voltage is less than 8 volts, the problem is low charge in battery or defective wiring. If voltage is 8 or more volts, loosen the cap on the tee at the fuel filter and release the fuel pressure at the solenoid. If the solenoid now works, the fuel transfer pump is holding fuel pressure at the solenoid. Clean or install a new fuel transfer pump. If solenoid does not work when pressure is released, install a new solenoid.Check for a dirty fuel filter by checking fuel pressure at the fuel filter outlet while turning the engine with the starter. If fuel pressure is less than 13 psi (0,9 kg/cm2) check fuel pressure at the outlet of the fuel transfer pump. If fuel pressure at the outlet of the transfer pump is more than the fuel pressure at the fuel filter outlet, install a new fuel filter.Check for a defective fuel transfer pump by checking fuel pressure at the outlet of the fuel transfer pump while turning the engine with the starter. If fuel pressure is less than 13 psi (0,9 kg/cm2), clean the primary fuel filter