Maintenance

Check the voltage of the battery with a digital voltmeter. Locate the voltage reading of the battery in the table and charge the battery for the recommended time interval to bring the charge up to a full charge of 12.6 volts or greater.

Important: Make sure the negative battery cable is disconnected and the battery charger used for charging the battery has an output of 16 volts and 7 amps or less to avoid damaging the battery (see chart for recommended charger settings).

Voltage

Percent

Maximum

Charging

Reading

Charge

Charger

Interval

 

 

Settings

 

12.6 or

100%

16 volts/7

No

greater

 

amps

Charging

 

 

 

Required

12.4 – 12.6

75–100%

16 volts/7

30 Minutes

 

 

amps

 

12.2 – 12.4

50–75%

16 volts/7

1 Hour

 

 

amps

 

12.0–12.2

25–50%

14.4 volts/4

2 Hours

 

 

amps

 

11.7–12.0

0–25%

14.4 volts/4

3 Hours

 

 

amps

 

11.7 or less

0%

14.4 volts/2

6 Hours or

 

 

amps

More

Recommended Jump

Starting Procedure

Service Interval: As required

1.Check the weak battery for terminal corrosion (white, green, or blue “snow”), it must be cleaned off prior to jump starting. Clean and tighten connections as necessary.

CAUTION

Corrosion or loose connections can cause unwanted electrical voltage spikes at anytime during the jump starting procedure.

Do Not attempt to jump start with loose or corroded battery terminals or damage to the engine may occur.

DANGER

Jump starting a weak battery that is cracked, frozen, has low electrolyte level, or an open/shorted battery cell, can cause an explosion resulting in serious personal injury.

Do Not jump start a weak battery if these conditions exist.

2.Make sure the booster is a good and fully charged lead acid battery at 12.6 volts or greater. Use properly sized jumper cables (4 to 6 AWG) with short lengths to reduce voltage drop between systems. Make sure the cables are color coded or labeled for the correct polarity.

CAUTION

Connecting the jumper cables incorrectly (wrong polarity) can immediately damage the electrical system.

Be certain of battery terminal polarity and jumper cable polarity when hooking up batteries.

Note: The following instructions are adapted from the SAE J1494 Rev. Dec. 2001 – Battery Booster Cables – Surface Vehicle Recommended Practice (SAE – Society of Automotive Engineers).

WARNING

Batteries contain acid and produce explosive gases.

Shield the eyes and face from the batteries at all times.

Do Not lean over the batteries.

Note: Be sure the vent caps are tight and level. Place a damp cloth, if available, over any vent caps on both batteries. Be sure the vehicles do not touch and that both electrical systems are off and at the same rated system voltage. These instructions are for negative ground systems only.

3.Connect the positive (+) cable to the positive (+) terminal of the discharged battery that is wired to the starter or solenoid as shown in Figure 12.

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Exmark 920 manual Recommended Jump Starting Procedure, Service Interval As required

0, 920 specifications

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