Kenmore Overlock Machine 385.16644 Owner's Manual (P/N 788800090, OEM)

The official 1999 OEM manual (P/N 788800090) for the Kenmore 385.16644 Overlock machine serves as the baseline PDF reference for servicing this 385-series serger. Across 114 pages, it delivers the exact factory specifications required for bench work, troubleshooting, and daily shop operations on 2, 3, and 4-thread configurations. Having direct access to the factory differential feed ratios (1:0.5 to 1:2.25) prevents fabric stretching or puckering, eliminating trial-and-error test runs on the bench.

• Provides essential setup data for thread paths, tension adjustments, and upper knife positioning
• Includes 56 operational diagrams and 16 detailed thread-path illustrations
• Features comprehensive machine-setting specification tables mapping fabric types to needle sizes
• Details the operation of 7 critical components: the lower looper pre-tension setting slider, changeable thread guide, telescoping thread guide bar, needle plate setting knob, cutting width adjusting dial, two-thread spreader, and chaining finger
• Covers specific techniques including the rolled hem, narrow hem, picot edge, decorative flatlock, pintuck, braiding, edging curves, and blind hem

User Guide and Maintenance Structure

Accurate threading and feed timing make or break a serger's performance. This documentation breaks down the machine setup from the ground up, supported by visual aids like the color-coded threading chart and upper knife replacement views. You get clear visuals for identifying specific thread paths and dialing in differential feed ratios. The text covers the integration of specialized attachments, such as the blind stitch and elastic feet. It also details routine shop tasks, saving you the cost of an expensive workshop visit. You will find exact, step-by-step procedures for replacing the upper knife, adjusting the cutting width, cleaning the feed dog, and oiling the machine's internal mechanical points.

Technical Specification Highlights

The manual provides hard data through reference tables like the comprehensive thread and needle chart for overedge width and differential feed settings. Need to know the tension ranges for a 4-thread heavy denim run versus a 3-thread lightweight organza edge? The cross-reference charts map it out precisely, alongside detailed thread tension adjustment schematics. A dedicated performance problems chart provides a specific diagnostic tool to isolate the root cause of skipped stitches and thread breaks. Service-relevant metrics include the 15-watt bulb requirement and the 1300 RPM maximum speed threshold. Please note that these specifications are provided for reference and adjustment purposes; always consult a certified technician before undertaking internal electrical or mechanical repairs to ensure safe operation.