Tube Stack And 'Wasting Zinc Anode - Beta Marine Beta 14 Installation 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. Please
refer to image 57. On most engines this is on the aft
end of the heat exchanger.
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. Please refer to image 58.
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. Please refer to image 58.
7. Re-fill engine with coolant (water/anti-freeze solution)
and run engine up to temperature to check for leaks.
Please refer 'Filling the Engine Coolant System' on page
46.
*NB: On Beta 45T, 70T, 85T, 90T, 105T & 115T which are turbocharged, the anode is attached to the bolt inserted in
the front gear end cap of the heat exchanger additionally the tube stack must be removed and replaced from the front
gear end. Please refer to image 59 & 60.
59
Zinc anode
57
Zinc anode Zinc anode
58
strip is horizontally in place
Ensure the tube stack is inserted with groove
horizontally aligned to the end cap rubber sealing strip
60
58
Ensure rubber sealing