88807A21 Mariner WIRE ASSEMBLY (4-1/2") (BLACK)

Do not use more than 55 kPa (8 psi) of air pressure in the fuel tank or damage to the tank may result.
Check for leaks at the connections between the fuel tank and the transfer pump. If leaks are found, tighten the connections or replace the lines. If there are no visual leaks, remove the fuel supply line from the tank and connect to an outside fuel supply. If this corrects the problem, the suction (standpipe) inside of the fuel tank has a leak.4. 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 the tank is free of water. Change the fuel filter and fill the fuel tank with a good quality fuel. The fuel priming pump may be used to fill the fuel filter and fuel gallery (in the cylinder head), from the fuel tank before the engine is started. If there is no water in the fuel, start the engine by using an outside source of fuel. If engine starts correctly using different fuel, remove all fuel from the tank and fill with a good quality fuel.5. Low fuel pressure: At starting rpm, the minimum fuel pressure for the fuel transfer pump must be 20 kPa (3 psi) with clean fuel filters. If the fuel pressure is less than 20 kPa (3 psi), look for air in the fuel system. (If fuel in the fuel tank cannot be checked for air, install a sight tube in the fuel return line). If the fuel pressure is still low, check the pressure regulating orifice and the fuel transfer pump for correct operation.6. Fuel injection timing not correct: Check and make necessary adjustments as per Testing and Adjusting Section of the Service Manual.7. Valve adjustment not correct: Check and make necessary adjustments as per Testing and Adjusting Section of the Service Manual. Intake valve lash is 0.38 mm (.015 in.) and exhaust valve lash is 0.64 mm (.025 in.).8. Defective fuel injector(s): Remove the fuel injectors and test as per Testing and Adjusting Section of the Service Manual.9. Low compression: Refer to Problem No. 4, Engine Misfiring Or Running Rough. Exhaust Smoke Cannot Be Seen While Starting Probable Cause(s):10. No fuel in tank(s): Check fuel level visually (do not use the fuel gauge only). If equipped with two tanks, 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.11. No fuel from fuel transfer pump: Loosen the fuel line from the fuel filter to the rear of the cylinder head. With ignition switch in the RUN position and accelerator in the "FUEL ON" position, turn the engine with the starter to be sure there is no fuel from the fuel transfer pump. To find the cause for no fuel, follow Steps (a) through (d) until the problem is corrected.a. The fuel priming pump may be used to fill the fuel filter and fuel gallery (in the cylinder head), from the fuel tank before the engine is started.b. Check shutoff solenoid by turning ignition switch to the RUN position. You must hear a sound when the plunger opens. If no sound is heard, make sure there is battery voltage at the solenoid. If the solenoid does not work, install a new solenoid.c. If you are not using a good quality of fuel at temperatures below -12°C (10°F), it is possible that the fuel in the system can "wax" (not have correct flow characteristics) and cause a restriction in the fuel system. Install a new fuel filter. It may be necessary to drain the complete fuel system and replace with No. 1 grade fuel.d. Check for fuel supply line restriction by removing the fuel supply line for the fuel filter base. Put 35 kPa (5 psi) of air pressure to the fuel tank.