Kohler Courage 18 SV470-600 Electrical Issues
I'm glad to have found this forum! I have a Toro LX-425 tractor with a Kohler Courage 18 SV470-600 engine. The tractor is now six years old and has been well cared for and runs OK.
The problem is that I have to trickle charge the battery in order to get it to start. If I don't, it turns over very grudgingly and sometimes will get enough gumption to start, but it's still a concern.
This problem actually started last fall. I first suspected the battery and took it to AutoZone to have it tested under load. They checked and said it was fine. I did some research online and found that my problem is not unique. In fact similar problems are written about on this forum - but too often the resolution is not reported!
Any way, I did the first check suggested in the Service Manual and put a VOM across the battery terminals. At rest it reads 12.65 volts. When starting it drops to fractional voltage levels, like .45 volts. When running it reads over 14 volts. When I shut down the engine, it read 13+ and steadily dropped back down to 12.5 to 12.6 volts over about a ten second period.
The manual says - "Battery Test
Test the battery voltage by connecting a DC voltmeter
across the battery terminals and cranking the engine.
If the battery drops below 9 volts while cranking, the
battery is discharged or faulty."
So now I suspect the battery again. Before I drop some significant bucks on a new battery, I thought I would ask you guys what you think. Is there something else I should be looking at?