Install the upper mount 1 and bolts 2 Be sure to install the ground lead 8 into the into the upper case, and then tighten the mount housing 6. A suction effect is created each time the piston moves upward in the cylinder. Install the O-ring 5, pump housing assembly 4, and dowel pins 6 into the lower case, tighten the bolts 7, and then install the grommet 8 and spacer 9. Install the reverse gear assembly to the propeller shaft housing using a press. This pressure assures an adequate fuel supply to the various operating systems of the powerhead. Check that the fuel vent screw of the fuel tank is open.
Top ring a: Replace the piston if out of specification. Good working practices Special tools Use the recommended special tools to pro- tect parts from damage. Install the rocker arm shaft assembly to the cylinder head by installing the bolts, 1. Clean the electrodes 1 with a spark plug Spark plug: 18 N·m 1. Install the new oil seals to the oil seal É housing as shown.
The powerhead cannot perform properly and produce its designed horsepower output if the fuel and ignition systems have not been redissolve dusted. Check the compression pres- sure of the combustion chamber. This action is necessary because the fuel pump does not have sufficient pressure to draw fuel from the tank during cranking before the engine starts. Remove the spark plug caps from the high-tension cords by turning the caps counterclockwise. Check that the camshaft dowel pin hole a is in the position shown in the illustra- and then tighten them to the specified torque. Replace if out of specifications.
Check that cooling water is discharged from the pilot water outlet. Camshaft journal diameter c: 1: 36. Measure the distance M between the shimming tool and the pinion as shown. In addition, air-fuel mixture is also supplied from the main nozzle in accordance with the opening angle of the throttle valve. If there is no water flow, check the Replace if out of specification. Following the fuel through its course, from the fuel tank to the combustion chamberof the cylinder, will provide an appreciation of exactly what is taking place. Can the oper- Replace the starter Remove all spark plugs, and ation sound relay.
At specified Add fluid to the correct level. It has been written to suit the needs of persons who have a basic understanding of the mechanical and electrical concepts and procedures inherent in the work, for without such knowledge attempted repairs or service to the equipment could render it unsafe or unfit for use. Install the remaining half of the bearings Checking the crankshaft main into the crankcase. Remove the gear pump cover 9, then Disassembling the gear pump the down-main valve 0 and up-main 1. Check the Woodruff key 3 and the groove a on the drive shaft for wear.
Replace the connect- ing rod if out of specification. Check the shift rod assembly and detent for smooth operation. É The enriched air-fuel mixture is delivered to cylinders 3 and 4 by the Prime Start system attached to carburetor 3. Overheat warning indicator is on. Turn the adjusting screw 4 in or out until the specified engine speed is obtained.
Valve clearance: Intake d: 0. Connect the light green Lg lead to the positive battery terminal and the black 1. Ignition coil resistance: Primary coil: Orange O —. Install the valve 2, spring seat 3, valve spring 4, and spring retainer 5 in the sequence shown, and then attach the special service tool. Install the taper roller bearing 1 to the 4. After every lapping procedure, be sure to clean off any remaining lapping com- pound from the cylinder head and the valve.
Single and two barrel carburetors are fed by a single float and chamber. Idle and low-speed operation Since the vacuum at the venturi is low when the throttle valve is opened slightly, the main nozzle does not supply any air-fuel mixture to the engine. Replace the float and needle valve, if out of specifica- Assembling the carburetor tion, as a set. This is typical of a clogged carburetor bowl vent. When this choke valve is fully closed, a very rich fuel mixture is drawn into the cylinders. Out of specifi- Check the ignition system out- cation? Install the new valve guide 2 by striking 4.
Install the needle valve 5, float 6, float Adjusting the throttle link rod pin 7, and screw 8 as shown, and then 1. Blow compressed air into all passages and jets. At specified Add engine oil to the correct level? You will be impressed by our selection, expertise, and customer service- we will strive to make you a Wholesale Marine customer for life. Various models have unique methods of checking ignition timing. Remove the engine oil dipstick and oil filler cap 1. The carburetor is merely a metering device for mixing fuel and air in the proper proportions for efficient engine operation. This second method requires the use of a dial indicator gauge.