TOHATSU MFS 8B Service Manual page 78

Adjusting system : Automatic control, no adjustment required
Run engine and use timing light to check ignition timing.
11 timings marks are found on the side of flywheel (TDC0°,
ATDC5°, 10°, BTDC5°, 10°, 15°, 20°, 25°, 30°, 35° and 40°),
and ignition timing is read with mark on the center of starter
case window.
Range of Ignition Angle
TDC 0°— BTDC 35°
1. Check anode and
and adherence of grease and oil. Clean, or replace if
necessary.
W h e n i t i s n e c e s s a r y t o d i s a s s e m b l e
outboard motor for inspection of anode, refer
to disassembly procedure described in this
manual. Reduction of anode volume can lead to
outboard motor body damage.
2. Replace anode and
Anode protects outboard motor from galvanic corrosion
(corrosion of metal due to very weak electric current).
Anodes are used in the gear case, clamp bracket (PT
models), and power unit cylinder.
Replace anode if volume is reduced to 2/3 of new part.
· Do not coat anode with oil or paint.
· Since periphery of anode installation bolt is
corroded more than other areas, be sure to
retighten bolt at every inspection.
3-28
Idling [500 r/min]
TDC 0°
(PT models) for build up of scale
if they are corroded excessively.
Accelerating [5500 r/min]
BTDC 35°
PT models
4st 8/9.8 2016