Belt Tensioning Adjustment - Beta Marine Beta 43 Operator's Maintenance Manual

(6) Re-assemble using new 'O' rings. Do not over tighten
end cap bolts and make sure the tube stack is the right
way round for end cap location.
27
Zinc anode
Belt Tension
65 Amp alternator (heat exchanger cooled)
Warning: Belt tension must only be checked with the engine
switched off.
(1) On heat exchanger cooled engines a single 65 amp is
fitted as standard. This alternator is adjusted as follows.
(2) The belt tension is adjusted by swinging the alternator
outboard as it pivots on its support bolts. See photo 29.
(3) With the engine stopped, loosen the support bolts and
the link adjusting bolt.
29
Adjuster bolt
(7) Re-fill engine with water/anti-freeze solution and run
engine up to temperature to check for leaks.
28
(4) Push alternator outboard to tension and tighten link bolt.
Check that the depression of the belt at position shown
1
is approximately /
2
firmly by thumb. Tighten support bolts. See photo 30.
(5) Belt tension should be regularly checked especially
during the first 20 hours of running in a new belt, as
stretching occurs.
100 Amp alternator (option)
The same method applies as outlined above, but final
tensioning must be by hand only. Over tensioning will cause
premature failure of components.
30
21
" or 12 mm when pushed down