the ps1 boards have a heat sink which is underneath the boards where the 8.4 volt battery if I remember correctly . you have tot urn the engine upside down when you remove the screw the board will come loose you will have to disconnect all the white red and yellow and maybe green wire plugs then you should be able to take the board out. there can be differences but you have to give us Engine item number if you want exact help! just curious but why do you want to take the boards out?
