Translations:KAVAN AP09 - Instruction Manual/34/en

2. Engine Bolts and Firewall Requirements.

For aircraft with a flat firewall, we suggest the use a suitable plastic (glass filled) motor mount. If the aircraft provides wood mounting beams, please make sure the beams are level. We suggest mounting the engine with M3 socket cap screws, washers and locknuts to the motor mount. If using a glass filled mount, the firewall in the airplane should be aircraft grade plywood no less than 3 mm (1/8”) thick. The firewall should also be reinforced to meet the torque and power of the engine.