Reed Valve - TOHATSU NB-1000 Service Manual

SECTION 3

REED VALVE

1
To inspect the reed valve of a one cylinder engine,
the powerhead must be disassembled, Refer to the
Powerhead section for removal and inspection
procedures in this section.
Disassembly
1. Follow steps listed in Carburetor Removal procedure, this section.
2
2. Disconnect the linkage at the throttle cam.
3. Remove the crankcase recirculation hose from the manifold.
4. Remove recoil starter or flywheel cover as applicable, refer to
Powerhead section.
3
5. Remove the intake manifold.
6. Remove the reed valve assemblies from the manifold or lift them
from the crankcase as applicable. DO NOT disassemble the reed
valve assemblies. (Except 8/9.8)
Inspection
4
1. lnspect the reed valve assemblies:
• All gasket surfaces must be flat, within ± 0.003 in [0.08 mm].
• Inspect reeds (1) for cracks or chips. Reeds must be seated fIat
without any preload.
• Check tightness of reed valve stoppers (2). If loose, tighten
screws using Loctite 242.
• Inspect valve seat surface (3) for rise, wear, or damage.
3-32
NOTE
4
T2052
T2053
T2054
T2055
1-/ 2-Cylinder