Tohatsu 4 Stroke MFS 2/2.5/3.5A Outboards Service Manual, Page 54Get this manual
18) Inspection of Ignition Timing Adjusting systemAutomatic control, requiring no manual adjustmentRun engine and use timing light to check ignition timing7 timings marks are found on the top of flywheel (TDC0 ("T"), BTDC51015202530 )Read ignition timing with mark on the center of flywheel cover windowModel F22.53.5A Range of Timing Angle BTDCBTDC 25
19) Inspection of Anode
1Check anode for build up of scale and adherence of grease and oilClean, or replace if necessary1
CAUTION
Do not coat anode with oil, grease or paint, or the anti-corrosion function does not work normally