Generac — Using a Booster Battery or Charger
Operation
From a Generac owner's manual covering: MDG150, MDG175, MDG250. Check it applies to your exact model before use.
Applies to: Generac MDG150, Generac MDG175, Generac MDG250, John Deere 6068HFG05 / 6068HFG06 engine
Before you start
- Explosion. Batteries emit explosive gases while charging. Keep fire and spark away.
- Equipment damage. Do not make battery connections in reverse.
Procedure
- Connect booster battery or batteries to produce the required system current.
- Connect one end of jumper cable to the POSITIVE (+) post of the booster battery.
- Connect the other end of the jumper cable to the POSITIVE (+) post of battery connected to starter.
- Connect one end of the other jumper cable to the NEGATIVE (-) post of the booster battery.
- Make the last connection of the NEGATIVE (-) cable to a good ground on the engine frame away from the batteries.
- Start the engine; disconnect jumper cables immediately after engine starts, NEGATIVE (-) cable first.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Parallel: Amps = twice as a single battery; Volts = same as single battery
Full service-parts list: Generac MDG150 →, Generac MDG175 →, Generac MDG250 →, John Deere 6068HFG05 / 6068HFG06 engine →
Source: Generac owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.