JDParts.com shows the part number as CH12200 up through serial number 005498. Part number is CH18036 above that serial number. Inventory check shows one actually replaces the other.
Part Number: CH18036
Part Price: 86.90 USD
On Hand: 0 Check Other Stores
Description: Switch
Package Quantity:
1
Part Number: CH18036
Replaces Part: CH12200
Part Price: 86.90 USD
On Hand: 0 Check Other Stores
Description: Switch
Package Quantity:
1
If it has screws to attach the wires,then Hoye Tractor has one-HLS4130 $15.29
If it is the one that has pigtail wires,it is on national backorder.
It looks like Yanmar only used 2 different light switches on the early John Deeres?