STIHL MS 170 Not Oiling
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
85%
CONF
|
Worm Gear Drive Link
The oil pump is mechanically driven by a worm gear with a metal engagement arm that hooks into the clutch drum. Over time, friction or mechanical stress causes this arm to wear down or lose its hook geometry, preventing the pump from rotating when the chain is engaged. Replacing the worm gear restores the mechanical connection between the engine's crankshaft and the oil pump plunger.
SKU: 1123 640 7105
|
VIEW ON AMAZON
#CommissionsEarned
|
|
10%
CONF
|
Oil Pump Assembly
Internal seals or the reciprocating plunger within the pump body can fail or become scored by fine particulate matter that bypasses the filter. If the drive link is intact but no oil is being displaced, the internal vacuum of the pump assembly has likely been compromised, requiring a full replacement of the non-serviceable pump housing.
SKU: 1123 640 3201
|
VIEW ON AMAZON
#CommissionsEarned
|
|
5%
CONF
|
Oil Pickup Hose and Filter
The elastomer oil line can degrade or collapse over time, or the porous filter element can become saturated with 'jellied' bio-oil or fine sawdust. This creates a vacuum restriction that prevents the pump from drawing fluid from the reservoir even if the mechanical drive is functional.
SKU: 1123 647 9400
|
VIEW ON AMAZON
#CommissionsEarned
|
DIY Repair Guide
Watch exactly how to replace the Worm Gear Drive Link.
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.