Deglaze (Recondition) Cylinder Bore - Briggs & Stratton 130G00 Repair Manual

D. See B of Figure 75. Set a straightedge vertically
across the length of the cylinder gasket surface.
Use feeler gauge to check for warpage. Repeat
step on opposite side.
E. See C of Figure 75. Set a straightedge horizontally
across the length of the cylinder gasket surface.
Use feeler gauge to check for warpage. Repeat
step on opposite side.
9. Repeat the 6 point check outlined under step 7 to check
for warpage or distortion of the crankcase to crankcase
cover mating surfaces. Be sure to check both crankcase
and crankcase cover. Discard the crankcase or
crankcase cover if any low spot is 0.004 inches (0.10
mm) or more.
10. Obtain the Dial Bore Gauge (Part No. 19487) to check
the cylinder bore for out-of-round and taper. Proceed
as follows:
NOTE: If the Dial Bore Gauge is not available, use the
Telescoping Gauge (Part No. 19485) and Dial Caliper
(Part No. 19609).
6
A. See Figure 76. At the top of the piston ring travel
zone, measure the cylinder bore diameter at two
locations- parallel and perpendicular to the
crankshaft (A-B). Write the readings down.
B. Repeat the two measurements at the center of the
piston ring travel zone (C-D).
C. Repeat the two measurements again at a point
below the piston ring travel zone (E-F).
D. If the two measurements at the top, middle or
bottom of the bore vary by more than 0.0015
inches (0.04 mm), then the cylinder is out-of-round.
E. If the top, middle and bottom bore diameters, either
parallel (A-C-E) or perpendicular (B-D-F) to the
crankshaft, vary by more than 0.003 inches (0.08
mm), then the cylinder is excessively worn (or
tapered).
F. If cylinder is not worn beyond the service limits
described under step 10(D) and 10(E), see

DEGLAZE (RECONDITION) CYLINDER BORE.

G. If cylinder is worn beyond the service limits
described under step 10(D) and 10(E), see HONE
(RESIZE) CYLINDER BORE.
Deglaze (Recondition) Cylinder Bore
NOTE: While also restoring the proper 45° cross hatch
pattern, deglazing removes wear patterns, minor scuff marks
and scratches without enlarging the bore diameter.
1. Tape over governor gear to keep out honing grit and
other debris.
62
76
2. To prevent damage to finishing stones, check the top
and bottom of the cylinder bore for burrs. Remove any
burrs with a fine-tooth file.
3. Obtain a three blade rigid hone with 320 grit aluminum
oxide finishing stones.
4. Place hone drive shaft in chuck of portable, variable
speed drill and tighten.
5. Using a suitable honing oil, liberally lubricate cylinder
bore and finishing stones.
6. Hone cylinder bore using a drill speed of approximately
200 RPM at 40-60 strokes per minute.
7. See Figure 77. Stop frequently to examine the cylinder
bore. A precise 45° cross hatch pattern in the piston
travel area is the most important.
NOTE: The angular cross hatch pattern ensures an
even flow of oil onto the cylinder walls and promotes
longer cylinder, piston and ring life. An improper cross
hatch pattern will result in insufficient oil retention and
possible piston seizure and/or high oil consumption.