2. Description and Operation
The DA 40 has a Lycoming 4-cylinder, horizontally opposed, direct drive engine. The engine type is IO-360-M1A. The engine has a wet sump oil system. The IO-360-M1A is air cooled and has a fuel injector system. It has an electric starter and Slick magnetos. It also has either a SlickSTART magneto booster system or a Limited Authority Spark Advance ignition system (LASAR).
The IO-360-M1A engine has a hollow crankshaft which lets oil flow to the propeller from the propeller governor. The propeller flange is type SAE 2 Mod. with 6 mounting bushings. The propeller turns in a clockwise direction when viewed form the cockpit.
The power plant has these components installed:
) Cowling
The power plant has a top and bottom engine cowling. The two halves attach to each other and to the airframe with camloc quick release fasteners. The top cowling has one small access panel for the engine oil filler and dipstick. The bottom cowling has two large cooling air intakes and one air intake for the engine air filter.
) Engine Mount
The engine mount attaches to the firewall at five locations. Tubular steel makes the mounting frame. The engine attaches to the engine mount with shock-mounts. Rubber and metal bushings make the engine shock-mounts.
) Electrical Harness
Electrical cables go through the firewall to connect to the engine. They give electrical supply to the engine starter motor, ignition system and engine sensors. Electrical cables from the generator supply electrical power to the airplane electrical system.
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Air Intakes The bottom cowling has these air intakes: ) The intake on the front left face of the bottom cowling supplies cooling air for the engine. ) The intake on the front right face of the bottom cowling has three outlets: @ A small outlet which supplies additional cool air to the engine. @ An outlet which supplies cooling air through integral ducting to the oil cooler. @ An outlet which connects to a flexible hose which supplies cooling air to the cabin heat system, to the battery and to the alternator. ) Engine air intake. This intake is located in the lower center of the cowling and supplies air to the engine air filter.
Engine Drain Pipes The engine has these drain pipes: ) Engine driven fuel pump drain. ) Fuel flow divider drain. ) Induction manifold drain.
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Engine Specification
DA 40 Series

Engine manufacturer.  Lycoming 
Engine model.  IO-360-M1A 
Engine operating limits: Rated output power. Rated output rotation speed during take-off and climb. Max. continuous rotation speed.  180 HP (134.2 kW) 2700 RPM 2400 RPM 
Ground run-up limits: Ground idle speed.  740 ± 20 RPM 
Oil pressure: Minimum Normal Maximum  25 psi 55 - 95 psi 98 psi 
Fuel pressure: Minimum Normal Maximum  14 psi 14 - 35 psi 35 psi 
Oil temperature: Minimum (not for continuous operation). Normal Maximum  149 °F 149 - 245 °F 245 °F 
Cylinder head temperature: Minimum Normal Maximum  150 °F 150 - 475 °F 500 °F 
Fuel grade:  AVGAS 100 or 100LL 
Oil specification (see Section 12-10):  Refer to Lycoming Operator's Manual. 

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Trouble-Shooting
1. General
The table below lists the defects you could have with the power plant. It does not give trouble shooting data for the engine or the engine systems. Refer to the Lycoming Operator's Manual for engine and engine system trouble-shooting.
WARNING:  YOU MUST BE CAREFUL WHEN YOU DO POWER PLANT TROUBLE SHOOTING. OPERATION OF A DAMAGED ENGINE CAN CAUSE MORE DAMAGE TO THE ENGINE. THIS CAN CAUSE INJURY TO PERSONNEL.
　
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