101049-5021 ZEXEL 9 410 613 939 BOSCH FUEL-INJECTION PUMP 9410613939 1010495021

Engine Crankshaft Turns Free Exhaust Smoke Can Be Seen While Starting Recommended Procedure1. Cold Outside Temperatures It can be necessary to use starting aids, or warm engine oil or coolant, at temperatures below 10° F (-12° C).2. Air in Fuel System With air in the fuel system the engine will normally be difficult to start, run rough and release a large amount of white smoke. Remove the air from the fuel system by either loosening the cap on the tee at the fuel filter, or by loosening the fuel line nuts one at a time at the cylinder heads. Turn the engine with the starter until the fuel flow at this connection is free of air. If air is not removed in this way put 5 psi (0,35 kg/cm2) [CAUTION do not use more than 8 psi (0,56 kg/cm2)] of air pressure to the tank and check for leaks at connections between the fuel tank and the fuel transfer pump. If there are no leaks at the connections, remove the fuel supply line from the tank and connect to an outside fuel supply. If this corrects the problem the suction line (standpipe) inside the fuel tank has a leak.3. Low Quality Fuel Remove a small amount of fuel from the tank and check for water in the fuel. If there is water in the fuel, remove fuel from the tank until it is free of water and fill with a good quality fuel. Change the fuel filter and "prime" (remove the air and/or low quality fuel from the fuel system) the fuel system as per the Operation Guide (FEO45119). 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.4. Fuel Injection Timing Not Correct Check and make necessary adjustments as per Testing and Adjusting section of the Service Manual.5. Valve Adjustment Not Correct Check and make necessary adjustments as per Testing and Adjusting section of the Service Manual. Intake valve adjustment is .015 in. (0,38 mm) and exhaust valve adjustment is .025 in. (0,64 mm).6. Bad Fuel Nozzle(s) Remove the fuel nozzles and test as per Testing and Adjusting section of the Service Manual.7. Low Compression See the chart Misfiring and Running Rough. Exhaust Smoke Can Not Be Seen While Starting8. 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.9. 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