TOHATSU 40 Service Manual page 237

SECTION 7
3. Run engine. Is engine performance acceptable? If it is, test is
complete (reconnect all wires disconnected during test).
If engine performance is still not acceptable, proceed with next
step.
4. Replace exciter coil(s). See Ignition System Repair Procedures
Exciter Coil.
Reconnect all wires disconnected during test.
Low Speed RPM Limitation
The 115, 120 and 140 model engines have a third type of speed
limitation. The CD Unit will limit the top engine speed to about 1500
RPM if the RED/YELLOW lead from the CD Unit to the remote
control box is not properly connected.
Low Speed RPM Limitation Test
If a 120 or 140 engine has a top speed of 1500 RPM, check for:
• RED/YELLOW wire connector (3) inside of engine housing
10
(4) makes good contact.
• RED/YELLOW wire (1) intact at CD Unit (2).
10
• RED/YELLOW wire connector (5) inside of remote control
10
box (6) makes good contact.
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T1489
3-/ 4-Cylinder