Most recent update....I ended up finding a "Heavy Duty Marine Ignition Switch" from Cole Hersee Company. Part # M-550 Can be found on sites like Amazon for $ 24.95. It has a brass case and thus far seems to be a suitable replacement for my old Yanmar one. It is rated as at 12 VDC
Ignition ............ 10 amps
Start .................. 5 amps



I will post a follow up review in a few weeks....

http://thej30manifesto.blogspot.com/