73
Note:
IT IS MOST IMPORTANT THAT THE ENTIRE
CYLINDER BE THOROUGHLY CLEANED AFTER
HONING.
Resize Cylinder Bore
If the cylinder bore is worn more than 0.003” (0.08 mm)
oversize, or is 0.0015” (.04 mm) out of round, it must be
resized.
Always resize to exactly 0.020” (.51 mm) larger than
standard bore size. Done accurately, the service oversize
rings and pistons will fit perfectly with proper clearances.
Use the stones and lubrication recommended by the hone
manufacturer to produce the proper sizing and finish.
Note:
IT IS MOST IMPORTANT THAT THE ENTIRE
CYLINDER BE THOROUGHLY CLEANED AFTER
HONING.
Clean Cylinder
1. Wash the cylinder thoroughly with kerosene or other
commercial solvent.
2. Wash cylinder again using a stiff brush with soap and
hot water.
3. Rinse cylinder thoroughly with hot running water.
4. Repeat washing and rinsing until all traces of honing
grit are gone.
Note:
Honing grit is highly abrasive and will cause rapid
wear to all of the internal components of the engine.
When cylinder and cylinder housing has been thoroughly
cleaned, use a clean white rag to wipe the cylinder bore
and internal cylinder housing surfaces. If honing grit is still
present, it will appear as a grey residue on the rag. Re-wash
and rinse entire cylinder, then check again. When there is
no trace of honing grit on the rag, the cylinder is properly
cleaned. Oil the cylinder bore to protect the surface.
MAG Bearing
Inspect MAG Bearing
Ball bearing must rotate freely. If any rough spots are felt,
the ball bearing must be replaced.
74
Note:
DO NOT reuse ball bearing. The bearing races are
usually damaged during removal.
Note:
Standard and reject sizes for the MAG bearing are
shown in
Section 13 - Engine Specifications
.
Remove MAG Bearing
1. Remove and discard oil seal (J) from cylinder housing
(H).
74 BRIGGSandSTRATTON.COM
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