![]() The engine will start up in a low power state at 3 degrees ATDC (AFTER Top Dead Center) timing, holding this advanced timing state for 3 to 8 seconds, then flipping over to regular running timing of 26 degrees BTDC (BEFORE Top Dead Center). This is the "ASM" or advance start modules and new flywheel combination doing their thing You should notice that the engine will start up smoothly, then with no other pilot input the engine will rev up by several hundred RPM after 3 to 8 seconds. ![]() Once this wire is properly installed, there is no special start-up procedure needed. For more vintage models, you should be able to find the serial number listed on the machine itself. Here is detailed info on how to connect it. To activate the advance start module, you need to hook up a wire from the bottom 6 pin connector (purple) to the starter solenoid. The newer electronic modules with the built in advance start have a part number (laser etched on the sides, closest to the 1/3 carburetor) of 966 727. Serial Numbers All Pfaff machines have a serial number, allowing the owner to determine what year the machine was made. If this serial number tag is yellow, then the Rotax "advanced Start" system is built in. The quickest way to check is to look at the top of the electronic modules for the color of the serial number tag.
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