Briggs & Stratton 250000 Specifiche Scaricare il pdf (Pagina 336)

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4

Time Counterweights Gears

1. Remove two small screws (1) from cover.

2. Insert 1/8” (3 mm) diameter locating pins (3)

through screw hole and into timing hole provided in

counterweights (2), Fig. 7.

NOTE:Breather screws and extended dipstick

tube screw may be used in place of

locating pins.

3. With piston at TOP DEAD CENTER, install the

crankcase cover assembly and cover gasket.

4. Remove the locating pins or screws.

5. Coat threads of timing hole screws with a non-

hardening sealant such as Permatex II. Install

screws and fiber sealing washers.

Fig. 7 – Timing Counterbalance Gears

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2

OSCILLATING COUNTERBALANCE SYSTEM

VERTICAL CRANKSHAFT

Disassemble

1. Remove sump.

2. Open connecting rod lock (when used) and

remove connecting rod screws.

3. Remove connecting rod and piston (1) from

engine.

4. Remove crankshaft and counterweight assembly

(2), Fig. 8.

5. Remove crankshaft gear. If gear is tight, pry gear

off with two screwdrivers, Fig. 9. Do not damage

gear.

Fig. 8

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NOTE:Save timing gear key on Model Series

171700. On current production Model

Series 252700, 253700, 255700, 256700,

and all 280000 engines the woodruff key

(3) can be removed if required, Fig. 9.

Fig. 9

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