Tube Stack And 'Wasting Zinc Anode - Beta Marine Beta 10 Operator's Maintenance Manual

HEAT EXCHANGER TUBE STACK AND 'WASTING ZINC ANODE'
1. The wasting zinc anode should be checked regularly
at least every six months and replaced every year or
sooner, as necessary. The anode is attached to the
bolt inserted in the end cap of the heat exchanger.
See photo 48. On most engines this is on the aft end.
2. Unscrew the bolt and replace the complete unit with
a new one.
3. It is possible for fine sea weed and other debris to get
past the inlet filter and into the tube stack. This
should be removed and cleaned. See photo 49.
4. Drain off coolant into a bucket.
5. Unscrew the 6 end cap retaining bolts using a 5 mm
Hex key (3 each end of the heat exchanger). Remove
the 'O' rings and slide out tube stack. Carefully clean
tube stack and end caps.
6. Re-assemble using new 'O' rings. The tube stack can
be fitted either way around but must be aligned
correctly with the horizontal line and rubber seal
between the alignment marks at the exhaust end of
the heat exchanger. (This ensures correct coolant flow
in the heat exchanger) Do not over tighten end cap
bolts.
7. Re-fill engine with coolant (water / anti-freeze
solution) and run engine up to temperature to check
for leaks.
48
Zinc anode
49
50
40