I have problem with EF3000ise NOT power AC and pilot light off but DC is ok around 20 volts after 10 min back AC normaly but many surging then ok normal. I did clean carb (change jet), adjust valve, install filters, etc. i check services manual an point to magnetic core or main coil resitance (i dont know where it locate) or main control unit over $700. I think over used because i from puerto rico maria huracane affected 70 days without electricity. I dont want go yamaha service with repair cost very expense here PR because situation.
I completed to test AC problem following instructions of service manual check generating core volts AC 250v and 24v DC and all point to control unit $$$ if any have good price please contact I interest to buy it.