Originally Posted by JollyPopper

Remove the engine and engine mount as an assembly from the firewall. You will want the engine mount removed to fuel proof the firewall anyway. You might have to remove the muffler first in order to get to the engine mount to firewall screws on that side. After you have the engine and engine mount in your hand, you can remove the needle valve assembly from the back plate and then all four of your engine mount screws will have access to all four engine mount bolts.