Description
Overview:
This Genuine Husqvarna Flywheel Ratchet Setting Screw (part no. 501 81 99‐01) is a precision-engineered fastener used to set and secure the flywheel ratchet on a wide range of Husqvarna machines, including the K750 and K950 disc cutters. Manufactured from durable, high-strength steel with a protective finish, it withstands vibration and harsh site conditions. The correct setting of the flywheel ratchet is important for reliable starter engagement and consistent machine performance. This OEM screw is a direct-fit replacement for the original component, helping restore proper function when the existing screw is worn, corroded, or missing. Suitable for both professional users and DIY maintenance, it is a small but essential part for keeping Husqvarna disc cutters and chainsaws running efficiently.
Key Features:
- Genuine Husqvarna OEM part for assured compatibility and performance
- Robust steel construction with protective finish for long service life
- Precision thread and head profile for accurate ratchet setting and secure fit
- Direct replacement for the original screw; no modifications required
- Helps maintain reliable starter ratchet engagement and smooth operation
- Compatible across many Husqvarna disc cutters and chainsaws
- Easy to fit with standard hand tools, reducing downtime
- Suitable for preventative maintenance as well as repair work
Typical Applications:
Used when servicing or rebuilding the flywheel and starter ratchet assembly, replacing damaged, corroded, or lost screws, or during routine maintenance of Husqvarna disc cutters and chainsaws. Ideal for workshop repairs, on-site servicing, and equipment overhauls where reliable starting and correct ratchet alignment are required.
Also known as:
Flywheel screw, ratchet screw, setting screw, flywheel ratchet set screw, starter ratchet screw, ratchet adjustment screw, pawl screw.
Fits Models:
242, 246, 254, 257, 261, 262XP, 265RX, 266, 266C, 268, 268K, 272K, 281, 281XP, 288, 288XP, 3120, 3120K, 3120XP, 3122K, 325HD75 X-Series, 356BF, 356BT, 362XP, 371K, 371XP, 375K, 385, 385XP, 390XP, 395XP, 42, 545, 550XP, 550XPG, 555, 556, 560XP, 560XPG, 562XP, 562XPG, 570, 570II, 576XP, 576XP AutoTune, 576XPAutoTune, 61, 66, K1250, K1250 Active, K1250 Rail, K1250Active, K1250Rail, K1260, K1260 Rail, K1260Rail, K1270, K1270 I, K1270 II, K1270 Rail I, K1270 Rail II, K1270I, K1270II, K1270RAIL, K1270RailI, K1270RailII, K650 Cut-n-Break, K650CUT-N-BREAK, K750, K760, K760 Cut-n-Break, K760 Rescue, K760CUT-N-BREAK, K760Rescue, K770, K950, K950 Chain, K950 Rescue, K950 Ring, K950Chain, K960, K960 Chain, K960 Rescue, K960 Ring, K960Chain, K960Rescue, K960Ring, K970, K970 Ring, K970Ring
Alternate Part Numbers:
501 81 99-01, 506 00 69-01, 506 00 69 01, 501-81-99-01, 506-00-69-01, 506006901, 501819901
Product Specifications
| L&S Part No. | 501 81 99 01 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 501819901 |
| Unit of Sale | 1 |
| Applications | 242, 246, 254, 257, 261, 262XP, 265RX, 266, 266C, 268, 268K, 272K, 281, 281XP, 288, 288XP, 3120, 3120K, 3120XP, 3122K, 325HD75 X-Series, 356BF, 356BT, 362XP, 371K, 371XP, 375K, 385, 385XP, 390XP, 395XP, 42, 545, 550XP, 550XPG, 555, 556, 560XP, 560XPG, 562XP, 562XPG, 570, 570II, 576XP, 576XP AutoTune, 576XPAutoTune, 61, 66, K1250, K1250 Active, K1250 Rail, K1250Active, K1250Rail, K1260, K1260 Rail, K1260Rail, K1270, K1270 I, K1270 II, K1270 Rail I, K1270 Rail II, K1270I, K1270II, K1270RAIL, K1270RailI, K1270RailII, K650 Cut-n-Break, K650CUT-N-BREAK, K750, K760, K760 Cut-n-Break, K760 Rescue, K760CUT-N-BREAK, K760Rescue, K770, K950, K950 Chain, K950 Rescue, K950 Ring, K950Chain, K960, K960 Chain, K960 Rescue, K960 Ring, K960Chain, K960Rescue, K960Ring, K970, K970 Ring, K970Ring |
| Machine Type | Disc Cutters |
| Fits Brands | Husqvarna |
| Fits Models | K750 | K950 | K1250 | K760 | K770 | K1260 | K1270, K1270 | K970 | 325HD75 X-SERIES | 3122K | K1250 Active | K1250 Rail | K1260 Rail | K650 Cut-n-Break | K760 Cut-n-Break | K760 RESCUE | K950 Rescue | K950 Ring | K960 | K960 Rescue | K960 Ring | K970 Ring | 242 | 246 | 254 | 257 | 261 | 262XP | 266 | 268 | 281 | 281XP | 288 | 288XP | 3120 | 3120XP | 362XP | 371XP | 385 | 385XP | 390XP | 395XP | 42 | 545 | 550XP, 550XPG | 555 | 556 | 560XP, 560XPG | 562XP, 562XPG | 570 | 570II | 576XP | 61 | 66 | 268K | 272K | 3120K | 371K | 265RX | 356BF | 356BT | 576XP AutoTune | K950 Chain | K960 Chain | K1270 I | K1270 II | K1270 II Smartguard | K1270 Rail I | K1270 Rail II | 375K |
