TOHATSU MD 30B2 Service Manual page 153

3. Remove engine anode 1 and check it.
Replace it if it is reduced to 2/3 of the original
size.
19) Inspection of Cylinder Head
1. Remove carbon deposit in the combustion chamber of
cylinder head, and check the interior for degradation,
damage and other defects.
2. Check water jacket interior for deposits.
When cleaning mating surfaces of cylinder head
by using a means such as a scraper or wire
brush, be careful not to scratch the surfaces.
3. Use straight edge 1 and thickness gauge 2 to check
distortion of cylinder head 3 in the directions shown.
Repair or replace if the distortion is over the specified limit.
Thickness Gauge :
Commercially Available Item
Functional Limit :
0.03 mm (0.0012 in)
4. If the distortion is over the limit, lap the component by
using a sheet of sand paper #240 - #400 placed on a
surface plate or thick plate glass and moving it on the
paper drawing the letter "8" on it. Finish by using sand
paper #600.
TLD D30/40/50B2 2013
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