Specifications

Starters

The starter rope, pulley and springs

The 25cc P25 series of engines are equipped with the Assist Spring Technology (AST) starters.The AST system

allows the customer to pull the recoil rope at any pace they please, yet still generate enough force to start the engine.

The system is simple, and adds a grand total of two parts to the trimmer: a recoil pulley assembly, which includes

an accumulator spring. As the rope is pulled, the accumulator spring winds-up. When the force on the accumulator

spring over-comes the engine compression, it releases its accumulated energy, spinning the crankshaft rapidly.

To service the rope, pulley and springs:

1. Remove the starter housing assembly by following

the procedures described in the previous section of

this chapter.

2. Remove the two screws securing the pressure plate

to the housing using a T-20 torx driver.

3. If the recoil rope has not already been de-tensioned

by breakage, remove the starter handle and relieve

tension from the rope.

4. Cut off the starter pulley retaining ring.

5. Carefully remove the pulley and starter assist (accu-

mulator) spring. See Figure 6.5.

Figure 6.4

Pressure plate screws

Retaining ring

! CAUTION! CAUTION

Eye protection should be worn

when working on these starters.

There are 2 clock springs inside that

can come out of the starters at a great velocity.

Figure 6.5

pulley and starter

spring

For Parts Call 606-678-9623 or 606-561-4983