Yamaha DRIVE2 AC 2019 Owner's/Operator's Manual page 31

Electrolyte 1/8" Below
Bottom of Fill Well
Max. Level -
(3 mm)
charged battery
Max. Level -
discharged battery
J0E
Fill Well
Electrolyte
1/8"
Y-937c
Y-936a
MAINTENANCE
Before charging: only add
G
distilled water if fluid is below the
top of the plates, and then add just
enough to cover plates.
After charging: open the vent caps
G
and look inside the fill wells. Add
distilled water until the electrolyte
level is 3 mm (1/8") below the
bottom of the fill well. A piece of
rubber can be used safely as a
dipstick to help determine this level.
Clean, replace and tighten all vent
caps.
NOTICE
Normal tap water contains
minerals which are harmful to a
battery; therefore, refill only with
distilled water.
3. Using a hydrometer, check the
specific gravity of the battery fluid
in each cell against the readings
on the chart below. Consult a
Yamaha dealer if any low readings
are found, or if readings vary more
than one point between cells.
Temperature
Satisfactory Uncorrected
Hydrometer Reading
°C °F
48.9 120
43.3 110
37.8 100
32.2 90
26.7 80
21.1 70
15.6 60
10.0 50
4.4 40
-1.1 30
1
2
3
4
5
6
7
8
9
1.244
1.248
10
1.252
1.256
1.260
11
1.264
1.268
1.272
1.276
1.280
8-4