Small Engines (Lawn Mowers, etc.)/Charging circuit


Need your assistance to help me understand how the battery gets the energy to recharge the battery when engine is running. The engine is ROTAX582UL used in my light hovercraft. What is the unit called. is it the rectifier/regulator?

Hi Yahaya

i have found web site for you to take a look at and download parts catalogue  

and maintenance manual

you are correct   it is a rectifier/regulator unit  

from memory  rotax units have  a stator / rotor assy   with  3 windings  - 2  ignition charge windings  and  the battery  a/c charging winding- ( this should have 3 wires ) all the same color   unit casing needs to be grounded to earth and get some cooling air over its fins to help get cool - it gets hot from converting a/c  to d/c  voltage.

when engine is running a rotor with magnets  spins over a stator winding  inducing  a  a/c voltage or sine wave is being output via those  3 wires to a solid state  rectifier/ regulator unit ( this unit  converts a/c voltage  to d/c voltage  by running a/c through a diode to become d/c )  the unit is also preset to a specific voltage where any excess output voltage not needed by the battery and system load  is directed to ground , and when system senses battery voltage is below a preset level - unit once again passes voltage back to battery to continue charging  in that way battery should never  boil or be undercharged   with the exception of  a fault of course!

take a look at web site and  down load mauals as above from web sites
i'am sure it will help you



Small Engines (Lawn Mowers, etc.)

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Briggs and Stratton MST qualified Tech - Certified Kohler Expert Tech 12 years experience in repair of Small Engines -Briggs,singles, twins Kohler, Honda , Kawasaki ----Husqvarna chainsaws and trimmers -shindiawa -chainsaws & trimmers etc Walker Mowers - Kubota Ride ons - Husqvarna ride on and outdoor power equipment, -Mtd Ride Ons, Push mowers etc


Briggs and stratton MST qualified Tech - Certified Kohler Expert tech 12 years experience in repair of small engines Husqvarna chainsaws and trimmers -shindiawa -chainsaws & trimmers etc WALKER zero turn mowers Kubota Ride on mowers Husqvarna ride on and outdoor power equipment Mtd Ride Ons, Push mowers etc some experience in 2 and 4 wheeler repair - Honda, Suzuki , Yamaha

Qualification - Briggs and stratton Master Service Tech 2005 onwards Qualification - Kohler Certified Tech Qualification - Mito NZQA National Certificate Outdoor Power Equipment Basic automotive trade skills & year 2 & 3 of Motorcycle engineering

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