Synchro-Balance® System (28Q700) - Briggs & Stratton Vanguard 05000 Manual

3. Install counterweight assembly into
cylinder and slide link (N) on to crankshaft
eccentric ([O] Fig. 14).
Fig. 14
4. Install timing gear on crankshaft.
Refer to Fig. 15.
5. Turn cranksh aft to position timing mark on
gear (A) toward camshaft location.
6. Install camshaft (C) and align timing
marks (B) and (A).
7. Position cylinder cover gasket (P) on
cylinder dowel pins.
8. Slide counterweight pivot shaft (Q) i nto
counterweight pivot shaft bore (R) and
install cylinder cover.
Fig. 15
Synchro-Balance® System (28Q700)
This system uses a link and counterweight that
oscillates opposite the piston Fig. 16.
Fig. 16
Removal/Inspection Synchro-Balance®
1. Remove sump cover and cylinder head.
See SECTION 10- CYLINDERS,
COVERS AND SUMPS.
2. Remove connecting rod cap.
3. Remove connecting rod and piston from
engine. See SECTION 12- PISTONS,
RINGS AND CONNECTING RODS.
4. Remove camshaft and crankshaft with
counterweight assembly.
5. Remove timing gear and woodruff key ([A]
Fig. 17). If gear is tight, pry off with two
screwdrivers being careful not to damage
gear.
Fig. 17
6. Remove screw (B) from counterweight.
7. Remove PTO side weight (C), dowel pin
(D), and link (E) from crankshaft,.
8. Remove crankshaft from magneto side
counterweight ([F] Fig. 18).
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