spider fails completely, you will experience a loss of power.
any manner, as a blow will cause permanent
,_ WARNING: Never hit the engine shaft in damage to the engine or the pump.
Follow the instructions carefully as the alignment of the couplings is critical.
•Disconnect the spark plug wire from the spark plug, and keep it away from the spark plug.
•Using a 1/2 inch wrench, remove three nuts and lock washers which secure the pump to the coupling shield. Two nuts are at the bottom corners and one is in the top center. See Figure
17.Remove the pump.
•Remove the nylon spider insert from the coupling and inspectfor wear. Replace if necessary.
•Inspect the engine coupling half jaws for signs of wear. Replace if necessary.
Coupling Shield | Rear Coupling |
\ | Support Bracket |
| Lock |
| Washer |
| Hex |
| Nut |
| ?p |
Coupling | 1 |
Half | ock |
| Washer |
Figure 17
To replace engine coupling half: Rotate the engine by pulling starter handle until engine coupling half set screw is at bottom. Loosen set screw using 1/8 inch allen wrench. Slide coupling half off engine shaft. See Figure 17.
Install new coupling half on engine shaft making sure to align key way in coupling half with key in the engine shaft.
Slide coupler half along engine shaft until the end of the shaft is flush with the inner portion of the coupling half. (There must be space
between end of the engine support bracket and the coupling half.) Apply LoctiteTM to threads of set screw and torque to 78
•Inspect the pump coupling half jaws for signs of wear. Replace ifnecessary.
To replace pump coupling half: Loosen set screw using 1/8 inch alien wrench. Slide coupling half off pump shaft.
Install new coupling half on pump shaft making sure to align key way in couplinghalf with key in pump shaft. Rotate coupling half untilset screw faces down. Do not tighten set screw now.
•Install new spider inserton to the engine coupling half.
•Align pump coupling half with nylon "spider" by rotating engine using starter handle.
Slide coupling half intoplace while guidingthree mounting bolts through holes in pump support bracket.
Note: The pump couplinghaff can be rotated by hand to aid in alignment. If the twoparts are not aligned
nght, the unit will not operate properly and damage could occur.
•Secure with nuts and washers removed earlier.
•Set .035 to .060 inch clearance between the nylon "spider" and the engine coupling half by sliding a matchbox cover between the nylon "spider" and the engine coupling half and moving pump coupling half as needed. See Figure 18.
•Apply Loctite TM to threads of set screw. Tighten set screw to torque 78
Reattach spark plug wire to spark plug.
PUMP
s,t4
Clearance __lves
Figure lg
16
