TOHATSU 2 Stroke Cylinder Series, Service Manual

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FUEL SYSTEM
3-33
1-/ 2-Cylinder
• Lift height of each reed valve and stopper must be within
specification.
• Inspect entire valve assembly :
lf any part of the reed valve assembly is worn, damaged, or
corroded, entire valve assembly must be replaced.
CAUTION
Used reeds must never be turned over and re-
used. Reed could break when returned to
service, causing serious powerhead damage.
2. Inspect the intake manifold:
• AIl gasket surfaces must be smooth and free of nicks.
• Check manifold surface for flatness in all directions.
Mounting surface must be flat, within ± 0.004 in [0.10 mm].
NOTE
All intake manifold components must be perfectly
clean before assembly. Use isopropyl alcohol. DO
NOT use a carburetor cleaner or a soaking tank.
2.5 / 3.5 5 8 / 9.8 9.9 / 15 / 18 25 / 30 40
No. Valves
Strips
Valves / Strip
2 2 6 6 8 12
1 Strip 1 Strip 2 Strips 2 Strips 4 Strips 4 Strips
2 Valves/Strip 2 Valves/Strip 3 Valves/Strip 3 Valves/Strip 2 Valves/Strip 3 Valves/Strip
A=Valve
Height
0.236-0.244 in
(6.0-6.2 mm)
0.236-0.244 in
(6.0-6.2 mm)
0.197-0.204 in
(5.0-5.2 mm)
0.236-0.244 in
(6.0-6.2 mm)
0.236-0.244 in
(6.0-6.2 mm)
0.236-0.244 in
(6.0-6.2 mm)
B=Gap
Valve End
Valve Seat
0.0079 in
(0.2 mm)
0.0079 in
(0.2 mm)
0.0079 in
(0.2 mm)
0.0079 in
(0.2 mm)
0.0079 in
(0.2 mm)
0.0079 in
(0.2 mm)
5
6
T1151
5
T2056