Cylinder Cleaning; Check Camshaft Bearings; Check Crankshaft Bearings; Remove Du™ Magneto Bearing - Briggs & Stratton 5 HP Troubleshooting & Repair Manual

Cylinder Cleaning

It is most important that the entire cylinder and crankcase
be thoroughly cleaned after honing.
First, wash the cylinder and crankcase carefully in solvent
such as kerosene or commercial solvent. Then thoroughly
wash cylinder and crankcase using a stiff brush with soap
and hot water. Rinse thoroughly with hot running water.
Continue washing and rinsing until all traces of honing grit
are gone. Honing grit is highly abrasive and will cause rapid
wear to all internal components of the engine unless it is
completely removed.
NOTE:
When the cylinder and crankcase have
been thoroughly cleaned, use a clean white rag or
napkin and wipe the cylinder bore. If honing grit is
present it will appear as gray residue on the rag. If
any honing grit is evident, re-wash and rinse the
entire cylinder and crankcase, and check again. When
there is trace of honing grit on the rag the
NO
cylinder is properly cleaned.

Check Camshaft Bearings

Replace cylinder or sump if cam gear bearings are worn
more than specification. Replace cylinder or sump if Plug
4
Gauge (#19164) can be inserted in bearing 1/4" (6.35mm)
or more
(Figure 77).
Figure 77 — Plug Gauge
If gauge is not available, replace cylinder or sump if bearings
are worn over .503" (12.78mm).
(#19164)
5 HP Outboard • Troubleshooting & Repair Manual

Check Crankshaft Bearings

Check the crankshaft bearings in the cylinder and sump
whenever the engine is apart. Gauge or measure at several
locations in bearing. Check the Mag bearing with Plug
Gauge (#19166) as shown
Figure 78 — Check Crankshaft Bearing
If no plug gauge is available, use .877" (22.28mm) as the
reject dimension. Replace the bearing if it exceeds the
reject dimension. Check the PTO bearing with Plug Gauge
(#19375). If no plug gauge is available use 1.0655"
(27.06mm) as the reject dimension. Replace the sump if it
exceeds the reject dimension.
Remove DU™ Magneto Bearing
1. Place Briggs & Stratton Cylinder Support Tool
(#19123)
(Figure 79)
Place Briggs & Stratton Bushing Driver (#19124)
down through worn bearing.
2. Press bearing out of cylinder.
44
Section 4 • Overhaul
.
(Figure 78)
under magneto bearing
3
.
2
1