![]() who's to know what the future trends will become. The resale value for must sewing machine made around this time are not as valuable as they look, however, don't get me wrong. Every company that was involved in their manufacture thrived during this time period, as the insatiable need for sewing new clothing and repairing old clothing outstripped demand. The late 50's and early 60's are referred to the golden age of sewing machines, not because of any one particular ground breaking model, although there were a few, but because of the incredibly high sales for any and all machines. This table will tel you the age of machine that have serial numbers starting with two letters. After 1900 the machine serial numbers have a single or two-letter prefix. 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).Serial numbers on Singer sewing machines manufactured prior to 1900 have numbers only. 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. 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. Serial Numbers All Pfaff machines have a serial number, allowing the owner to determine what year the machine was made. production figures were: Year Annual Serial Numbers No. With those numbers you can contact the manufacturer and they should be able to tell you when your machine. In 1867 already 110 sewing machines were manufactured with 20 employees. 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. Locate the model and serial number on the machine. 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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