Belt Tensioning Adjustment; Air Filter Inspection / Replacement - Beta Marine Beta 10 Operator's Maintenance Manual

Belt Tension
Warning: Belt tension must only be checked with the engine
switched off.
These engines are fitted as standard with a single belt that
drives both the 40 Amp battery charging alternator and the
fresh water /engine coolant circulating pump.
40 Amp alternator (heat exchanger cooled)
(1) The belt tension is adjusted by swinging the alternator
outboard as it pivots on its support bolts. See photo 36.
(2) With the engine stopped, loosen the support bolts and
the link adjusting bolt.
36
Adjuster bolt
Air Filter Intake
These engines are fitted with an air intake filter which should be checked every season and changed every 2 years or sooner if
badly clogged. If badly clogged check more often.
38
(3) Push alternator outboard by hand to tension the belt, then
tighten link bolt. Check that the depression of the belt (at
position shown) is approximately
pushed down firmly by thumb. Tighten support bolts. See
photo 36.
(4) Belt tension should be regularly checked especially during
the first 20 hours of running in a new belt, as stretching
occurs.
70 Amp alternator (option)
The same method applies as outlined above with the
'polyvee' flat belt, but final tensioning must be by hand only.
Over tensioning will cause premature failure of components.
37
39
25
1
/ " or 12 mm when
2