Service Manual

1-7
Table of Contents
General
Twin Cylinder Engine Service Manual
February 2017 - Digital Edition
GENERAL SERVICE INFORMATION
Engine Component Specications (Cont.)
Part Item Standard Service Limit
Valve Guides Inside Diameter
(Intake, Exhaust)
0.2598 - 0.2604 in.
(6.60 - 6.615 mm)
0.2624 in. (6.665 mm)
Stem to Guide
Clearance (Intake)
0.00079 - 0.00197 in.
(0.02 - 0.05 mm)
0.0059 in. (0.15 mm)
Stem to Guide
Clearance (Exhaust)
0.00157 - 0.00275 in.
(0.04 - 0.07 mm)
0.00669 in. (0.17 mm)
Valve Seat Seat Width 0.02756 - 0.03149 in.
(0.7 - 0.8 mm)
0.05118 in. (1.3 mm)
Valve Spring Free Length 1.555 - 1.594 in.
(39.5 - 40.5 mm)
1.535 in. (39.0 mm)
Camshaft Height
(Intake & Exhaust)
1.1791 - 1.1831 in.
(29.95 - 30.05 mm)
1.1713 in. (29.75 mm)
Journal (Bearing) 0.6286 - 0.6293 in.
(15.966 - 15.984 mm)
0.6266 in. (15.916 mm)
Crankcase Cover Camshaft Hole Diameter 0.6299 - 0.6306 in.
(16.0 - 16.018 mm)
0..6326 in. (16.068 mm)
Crankshaft Hole
Diameter
1.5751 - 1.5758 in.
(40.009 - 40.025 mm)
1.5778 in. (40.075 mm)
Spark Plug Gap 0.030 in.
(0.7 - 0.8 mm)
-
Ignition Coil Resistance (Primary) 1.6 - 1.9 Ω -
Resistance (Secondary) 6.2 - 7.1 KΩ -
Gap to Flywheel 0.011 in.
(0.3 mm)
-
Governor Assembly
Clearance
Governor end play 0.002-0.013 in.
(0.05-0.35 mm)
-