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3. Insert piston pin from side opposite shoulder or installed
lock until pin stops against lock or shoulder.
4. Install piston pin lock in groove at other end of piston pin.
5. Be sure lock is firmly set in groove.
Note: Some rods have the word "MAG" cast in the rod on
the flywheel side.
Install Piston Rings On Piston
The correct piston ring positions are shown in Fig. 125.
5
Fig. 125 – Piston Ring Installation
1. ID mark
2. Top
3. Center
Compress Rings
1. Oil piston rings and piston skirt.
2. Compress rings with Briggs & Stratton Tool #19070, Ring
Compressor, Fig. 126.
1
2
Fig. 126 – Compressing Rings
1. Top
2. Skirt
3. Place piston and compressor upside down on bench and
push piston down until head of piston is even with edge of
compressor.
4. Tighten compressor until piston cannot be turned in
compressor.
5. Then loosen compressor until piston can be turned with
slight resistance.
Note: Do not attempt to install piston and ring assembly
without ring compressor.
GTS 200
1
2
1
3
4
4. Oil
5. Expander
3
3. Projection
Install Connecting Rod and Piston
1. Thoroughly clean and then oil cylinder bore.
2. Rotate crankshaft until crankpin journal is at bottom of
stroke.
Note: This permits complete entry of compressed rings,
piston and rod assembly, when pushed into cylinder,
Fig. 127.
1
4
3
2
Fig. 127 – Installing Piston Assembly
1. #19070 ring compressor
2. Piston skirt
3. Square hole
4. Piston
3. Install piston with notch or arrow toward flywheel side of
engine, Fig. 128, taking care not to damage crankpin
journal or connecting rod journal, when installing.
Fig. 128 – Installing Piston Assembly
1. Notch or arrow
4. Clean and oil crankshaft crankpin.
51
5
6
5. Wrench
6. Top of piston and ring
compressor flush
7. Top of piston
1
Pistons, Rings, and Rods
7
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