Charge problem Honda 20HP engine

mc_harley · Dec 20, 2013

Hi, I am mc_harley from the Netherlands and this is my first post here. My hobby is buying, repairing and selling sit on lawnmowers. I prefer Stiga Villa and Park frontmowers. But now I have a problem with a sit on mower with no brand. I only see 4422 and powered by Honda. Now I like to have some help from you.
I am working on this mower with a 20hp engine I got it starting, driving and running but not charging the battery. I have power on the white wire comming from the regulator/rectifier but when I connect this wire to the battery to charge the wire is getting so hot that the wireprotection is melting. Can someone tell me what is wrong here. I think the regulator/rectifier needs to be replaced or am I wrong?

thanx
mc_harley

Fish · Dec 20, 2013

How many volts DC? The other 2 wires going up to the alt? unplug them and take an AC reading there too.

mc_harley · Dec 21, 2013

Fish said:
How many volts DC? The other 2 wires going up to the alt? unplug them and take an AC reading there too.

Hi Gonzo,
the 2 wires comming from alt, I took one off and I read AC 22.5 to 7 DC 0.00 up to 0.10
1 took the other and I read also AC 22.5 to 7 DC 0.01 up to 0.03
When I take both wires off at same time I have 0 reading.

Then I took the white wire that has to be connected to the battery and also read AC 22,5 to 7 DC 0.00 up to 0.10 and sometimes just 0.00

I hope I did this right and you can help me.

Greetings,
mc_harley

Fish · Dec 21, 2013

Take an AC reading by putting a lead on each wire coming from the alt, I don't know the numbers for Honda, but Kohler's alt's should read 28 vac or higher, if you have that, the alt should be OK. There are some Honda folks here, maybe they will chime in.

jroske · Dec 30, 2013

mc_harley said:
Hi Gonzo,
the 2 wires comming from alt, I took one off and I read AC 22.5 to 7 DC 0.00 up to 0.10
1 took the other and I read also AC 22.5 to 7 DC 0.01 up to 0.03
When I take both wires off at same time I have 0 reading.

Then I took the white wire that has to be connected to the battery and also read AC 22,5 to 7 DC 0.00 up to 0.10 and sometimes just 0.00

I hope I did this right and you can help me.

Greetings,
mc_harley

Do you have the model and serial number of the motor?

mc_harley · Dec 31, 2013

jroske said:
Do you have the model and serial number of the motor?

Hi Jroske,
Where I bought the Lawnmower he couldn't solve the problem but he wrote down a number like GJAD 1004299 QAF4 the model is GXV620. I just bought a new multimeter and trying to find out how it works. I think that the rectifier is dead. I had a spare from another 16hp motor and this one is dead too. I have a rectifier from a Briggs and Stratton, is it possible to connect this one to the wire coming from alt and see of this will work.

I found something else, the mowerdeck is connected with a PTO. There are 2 wires going to the PTO and between these two wires is a diode (blown up) but what is the reasen of that diode it is connected between pos. and neg.

Thanx
mc_harley

robert@honda · Jan 3, 2014

The charge coil should measure 0.23-0.21 ohms (for the smaller 3A coil)
The larger 30A charge coil should measure 0.17 - 0.23 ohms.

Here's how to inspect / text the regulator/rectifier:

Note the 3A type has 3 wires, while the 20A type has a 6-wire plug:

Hope this helps...

mc_harley · Jan 3, 2014

Thanx Robert@Honda,

I don't have the multimeter you adviced. I used the UT109 and messured >| according your info but I only got a reading from ACG1 to Batt(W) 0,470 and the same from ACG2 to Batt(W) 0,470 everyting else is OL. For R , I didn't get any reading. This was the spare rectifier I used first.
The originel that was on the Honda had readings from every point but I could see on the backside that it was blown open. I didn't put the spare rectifier on the Honda yet but I try this tomorrow. Why is there a diode (this one is also blown up) on the PTO wires (+ |< - )? Normaly there is no diode.
Anyway thank you for your help.
Mc_harley

mc_harley · Jan 4, 2014

I tested today the spare rectifier. Output alt. 2 wires one side 25.5 Vac the other side 28.5 Vac. Then I tried output dc and I get 10.5 and after a while 6.5. Wire didn't get hot anymore. Bud for charging the battery I think I need a new rectifier.
These thngs are expensive does anyone have a solution with a cheaper universal or maybe from a bike that I can use.
I want to thank everyone for his help for now.
I think the brand is Wikov Slavia 4422 (1998) by Wisconsin Engeneering. I cannot find a picture.

Greeting
mc_harley

mc_harley · Jan 7, 2014

Last info!!
I bought a new rectifier and put it on the mower. (SH621A 12 with only 4 wires out against 6 wires out from the old rectifier (SH621 12) but it works fine Battery is charging 14,60 V and no wires are hot.
I think I will need you when I have my next problem that I cann't figure out.

Charge problem Honda 20HP engine

More options

mc_harley

Member

Fish

Lawn Pro

mc_harley

Member

Fish

Lawn Pro

jroske

Member

mc_harley

Member

robert@honda

Lawn Addict

mc_harley

Member

mc_harley

Member

mc_harley

Member

Footer Links 1

Footer Links 2