Outboard Repair Manual Ebook - 275110 BRIGGS & STRATTON
Outboard Repair Manual Ebook - 275110 BRIGGS & STRATTON
Outboard Repair Manual Ebook - 275110 BRIGGS & STRATTON
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WARNING
Wear eye protection when
installing or removing starter
pulley and spring. The starter
spring is still under tension when
the rope has been removed and
the pulley has been unwound.
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2. Lift out pawls (Figure 61) .
3. Rotate pulley until pulley feels free.
4. Carefully lift out pulley with spring (Figure 62).
Inspect Spring, Starter Housing and Pulley
1. Inspect pulley for wear, cracks, rough edges
(Figure 63) or burrs in pulley groove and wear
on center hole .
2. Replace pulley if damaged or worn.
3. Inspect spring for broken ends, kinks and burrs.
Replace assembly if any of the above conditions exist.
4. Inspect starter housing for wear or sharp edges at
rope eyelet (Figure 64) , center pivot post , and
inner spring anchor tab .
5. Replace assembly if worn or damaged.
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Section 3 Disassembly
5 HP Outboard Troubleshooting & Repair Manual
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Figure 61 Rewind Starter Pulley
Figure 62 Pulley With Spring
Figure 64 Starter Housing
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Figure 63 Starter Pulley Spring
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CAUTION: Pulley and spring is serviced
as an assembly. Do not remove spring from
pulley.
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Section 3 Disassembly
5 HP Outboard Troubleshooting & Repair Manual
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Section 4 Overhaul
5 HP Outboard Troubleshooting & Repair Manual
4 Overhaul
Overhaul 37
Magnetron Ignition 39
Remove Armature 39
Inspect Valve Springs 39
Inspect Valve Guides 39
Finish Ream Valve Guides 39
Reface Valves and Seats 39
Remove Piston Rings 39
Check Piston Ring Groove Wear 40
Check Piston Ring End Gap 40
Check Connecting Rod 40
Undersized Connecting Rods 40
Check Piston Pin and Piston Pin Bore 41
Inspect Crankshaft 41
Inspect Camshaft 42
Check Cylinder 42
Cylinder Resizing 42
Set Up For Honing 42
Hone Cylinder 43
Cylinder Finish (Cross Hatch) 43
Cylinder Cleaning 44
Check Camshaft Bearings 44
Check Crankshaft Bearings 44
Remove DU Magneto Bearing 44
Install DU Magneto Bearing 45
Oil Seals 45
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Section 4 Overhaul
5 HP Outboard Troubleshooting & Repair Manual
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Magnetron Ignition
Remove Armature
The best means of testing Magnetron armatures is on the
engine. Before replacing the armature, be sure that the
problem is not in the wiring, the safety/engine stop switch,
the neutral switch or speed limiter.
Inspect Valve Springs
Replace broken, distorted or worn valve springs.
Inspect Valve Guides
1. Check valve guides for wear using Reject Gauge Tool
(#19122).
2. If flat end of gauge can enter guide for 1/4" (6.35mm)
or more, valve guide is worn. Replace the cylinder
head.
3. If plug gauge is not available, replace the cylinder head
if the valve guide exceeds .267" (6.78mm).
Finish Ream Valve Guides
NOTE: The following procedure is recommended
to assure that the entire guide is clean and free of
foreign material.
1. Use Finish Reamer Tool (#19096) and Reamer Pilot
Guide Tool (#19191) to remove foreign material or
burrs from guide.
2. Use Stanisol or kerosene to lubricate reamer.
3. Ream through entire guide.
4. Keep turning reamer clockwise when removing
reamer.
5. Flush out all reaming chips.
Reface Valves and Seats
Valve faces can be resurfaced using a commercially available
valve grinding tool. Briggs & Stratton does not recommend
this practice as a high quality repair procedure. Valve
replacement is recommended for damaged or worn valves.
Valve seats (Figure 65B) are cut to 45 using Tool
(#19237) or (#19343), Neway Valve Seat Cutter Kit.
Valve and seat are lapped in using Valve Lapping Tool
(#19258) and Valve Lapping Compound (#94150) to
assure a good seal between the valve face and the seat.
1. Thoroughly clean lapping compound from valve seat
and valve face.
2. Valve seat width should be as shown (Figure 65B).
3. If seat is wider, a narrowing cutter should be used. If
valve face is badly burned, the burned valve should be
replaced.
4. Replace valve if margin (Figure 65A) is less than
1/32" or is damaged.
5. Valve seat width should be 3/64 - 1/16". If the seat
width is not within specification, or if the seats are
burned or damaged, replace cylinder head.
Remove Piston Rings
Remove piston rings using Piston Ring Expander (#19340)
as shown (Figure 66).
NOTE: Some oil control rings consist of two thin
steel rails and a spring expander. The steel rails
cannot be removed with the piston ring expander.
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OVERHAUL
Section 4 Overhaul
5 HP Outboard Troubleshooting & Repair Manual
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Figure 65 Valve & Seat Specifications
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