Mercury Racing 500R Operation And Maintenance Manual page 30

*Engine at normal operating temperature.
**The idle charge compensation may automatically increase the engine
speed up to 725 RPM to compensate for a low battery charge condition.
The increased idle RPM will charge the battery at a higher rate. Activating
troll control (optional accessory) will override the idle charge compensation
feature.
***Battery manufacturers may rate and test their batteries to different
standards. MCA, CCA, Ah, and reserve capacity (RC) are the ratings
recognized by Mercury Marine. Manufacturers that use standards different
than these, such as equivalent MCA, do not meet Mercury Marine battery
requirements.
ENGINE BATTERY SPECIFICATIONS
IMPORTANT: This engine requires a 12‑volt absorbed glass mat (AGM) marine
starting battery that meets the minimum ratings.
Do not use flooded (wet cell) lead acid batteries, gel cell lead acid batteries, or
lithium‑ion batteries for starting marine engines.
Each engine must be equipped with its own starting battery.
If the boat application requires additional battery loads for boat accessories or
marine electronics, install an auxiliary battery or batteries.
Required 12‑Volt Absorbed Glass Mat (AGM) Battery Ratings
USA (SAE)
starting battery
rating:
International (EN) starting battery rating:
NOTE: Do not use an engine starting battery that does not meet the specified
ratings. If a battery that does not meet the ratings is used, the electrical system
may perform poorly.
IMPORTANT: Boating industry standards (BIA, ABYC, etc.), federal standards,
and Coast Guard regulations must be adhered to when installing the battery.
Ensure that the battery cable installation meets the pull test requirements
and that the positive battery terminal is properly insulated in accordance with
regulations.
It is recommended (required in some states) that the battery be installed in an
enclosed case. Refer to local regulations.
GENERAL INFORMATION
With dedicated
house battery
Cranking battery
only
20
1000 minimum marine cranking
amps (MCA) with a minimum
reserve capacity of 100 minutes
RC25 rating
1000 minimum marine cranking
amps (MCA) with a minimum
reserve capacity of 135 minutes
RC25 rating
800 minimum cold cranking amps
(CCA) with a minimum of 65‑amp
hours (Ah)
eng