12
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
3
1
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
1
2
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
3
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